AI-generatedOnomichi at a glance
- Best time
- May – Oct
- Warmest month
- Aug · 34°
- Warmest sea
- Aug · 27.8°
- Sunshine a year
- 1,990 h
- Rain a year
- 1,268 mm
- Climate
- Temperate
- Time zone
- UTC+9
- Elevation
- 52 m
Climate in Onomichi
Onomichi has a temperate climate with warm summers and cool winters. August is the warmest month with average highs of 34 °C, while January is the coolest at 10 °C. With around 1,990 hours of sunshine a year, Onomichi is moderately sunny; May is the sunniest month with 6.7 hours a day.
Holiday weather through the year
Best time to visit Onomichi
The best time to visit Onomichi is from May to October. In August, September and October, though, the typhoon season is at its peak: check the forecast before you go. For a beach holiday – sea from 21 °C, warm and mostly dry – go in June and from August to October. For sightseeing, day trips and hiking, conditions are most comfortable from April to May and from October to November. In August it can get very hot, with highs of up to 34 °C. The wettest month is July with 180 mm of precipitation.
Onomichi through the seasons
How the weather changes over the seasons, with averages for each.
Onomichi in spring
Mar – May
Poor
- 15–25 °C by day
- Sea 15 °C
- 6.2 h of sun a day
- 29 rainy days in all
Onomichi in summer
Jun – Aug
Good
- 28–34 °C by day
- Sea 25 °C
- 5.8 h of sun a day
- 34 rainy days in all
Onomichi in autumn
Sep – Nov
Good
- 18–30 °C by day
- Sea 24 °C
- 5.2 h of sun a day
- 24 rainy days in all
Onomichi in winter
Dec – Feb
Poor
- 10–12 °C by day
- Sea 14 °C
- 4.6 h of sun a day
- 18 rainy days in all
Which month for what?
Beach & swimming
Jun, Aug – Oct
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Apr – May, Oct – Nov
15–28 °C and not too much rain
Peak heat
Aug
Highs of 33 °C or more
Find your perfect month
Tell us what you like and we rate every month in Onomichi for you.
Your best months: September
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Good
Best time to visit: May – October
October is the peak of the typhoon season Hurricane season
Where to go in OctoberSea temperature in October
Good forBeach & swimmingSightseeing & walks
Keep in mindStorm season
A typical day in October
- Morning, 08:00: about 17°
- Midday, 13:00: about 24°
- Afternoon, 16:00: about 23°
- Evening, 20:00: about 18°
- Night, 23:00: about 16°
06:1117:34
Pleasant evenings; a light layer can help.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 05:56–06:45 · evening 17:00–17:50
- Blue hour
- Morning 05:46–05:56 · evening 17:50–17:59
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
October in Onomichi compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 26° at the start of the month to 21° at the end. The sea cools from 25° to 22°. The days get 1.0 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 26° | 21° |
| Night-time low | 17° | 10° |
| Sea | 25° | 22° |
| Daylight | 11.9 h | 10.9 h |
What is the weather like in Onomichi in October?
In October, Onomichi is warm: daytime highs average 24 °C, and nights cool down to about 13 °C. The sea averages 23.8 °C – pleasant for swimming. Expect around 5.4 hours of sunshine a day. Rain falls on about 8 days, adding up to 111 mm. All in all, October is a good month for a holiday in Onomichi.
More details for October
- Daylight
- 11 h 23 min06:11 – 17:34
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 3 daysdew point 18 °C or moreAll months
- Wind
- 15 km/haverage daily peakAll months
- Cloud cover
- 50 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+9offset from UTC
How the score comes together
- Temperatureweight 35 %78 %
- Seaweight 25 %97 %
- Sunshineweight 20 %40 %
- Few rainy daysweight 20 %72 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Swimwear
- Sunscreen
- A jumper for the evenings
Compare two months in Onomichi
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
October and September bring similar holiday weather to Onomichi (score 74 and 78). In September, days are 6 °C warmer than in October. The sea is 3 °C warmer in September. September has 2 more rainy days.
| Month | October | September |
|---|---|---|
| Holiday weather score | 74 | 78 |
| Daytime high | 24° | 30° |
| Night-time low | 13° | 20° |
| Sea | 23.8° | 26.9° |
| Sunshine | 5.4 h | 5.2 h |
| Rainy days | 8better | 10 |
| Rainfall | 111 mmbetter | 144 mm |
| Muggy days | 3better | 20 |
Based on the climate averages 1996–2025.
Onomichi month by month
The typical weather for every month at a glance.
23January10° · Sea 14° · 4.5 h
In January, Onomichi is cold: daytime highs average 10 °C, and nights cool down to about 0 °C. The sea averages 13.8 °C – swimming is only for the hardy. Expect around 4.5 hours of sunshine a day. Rain falls on about 5 days, adding up to 43 mm. All in all, January is not an ideal month for a holiday in Onomichi.
Onomichi in January22February11° · Sea 13° · 4.9 h
In February, Onomichi is cool: daytime highs average 11 °C, and nights cool down to about 1 °C. The sea averages 12.5 °C – swimming is only for the hardy. Expect around 4.9 hours of sunshine a day. Rain falls on about 7 days, adding up to 56 mm. All in all, February is not an ideal month for a holiday in Onomichi.
Onomichi in February21March15° · Sea 13° · 5.6 h
In March, Onomichi is cool: daytime highs average 15 °C, and nights cool down to about 4 °C. The sea averages 12.9 °C – swimming is only for the hardy. Expect around 5.6 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 95 mm in total. All in all, March is not an ideal month for a holiday in Onomichi.
Onomichi in March31April21° · Sea 15° · 6.3 h
In April, Onomichi is mild: daytime highs average 21 °C, and nights cool down to about 9 °C. The sea averages 14.9 °C – swimming is only for the hardy. Expect around 6.3 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 109 mm in total. All in all, April is not an ideal month for a holiday in Onomichi.
Onomichi in April63May25° · Sea 18° · 6.7 h
In May, Onomichi is warm: daytime highs average 25 °C, and nights cool down to about 14 °C. The sea averages 18.0 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 6.7 hours a day. Rain is frequent, with about 10 rainy days and 131 mm in total. All in all, May is a good month for a holiday in Onomichi.
Onomichi in May68June28° · Sea 22° · 5.1 h
In June, Onomichi is hot: daytime highs average 28 °C, and nights cool down to about 19 °C. The sea averages 21.7 °C – refreshing for a swim. Expect around 5.1 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 178 mm in total. On about 6 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, June is a good month for a holiday in Onomichi.
Onomichi in June72July32° · Sea 25° · 5.6 h
In July, Onomichi is hot: daytime highs average 32 °C, and even at night it stays warm at around 23 °C. The sea averages 25.4 °C – pleasant for swimming. Expect around 5.6 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 180 mm in total. On about 24 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is a good month for a holiday in Onomichi.
Onomichi in July70August34° · Sea 28° · 6.7 h
In August, Onomichi is very hot: daytime highs average 34 °C, and even at night it stays warm at around 24 °C. The sea averages 27.8 °C – lovely and warm for swimming. The sun shines for around 6.7 hours a day. Rain is frequent, with about 10 rainy days and 116 mm in total. On about 29 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is a good month for a holiday in Onomichi.
Onomichi in August78September30° · Sea 27° · 5.2 h
In September, Onomichi is hot: daytime highs average 30 °C, and even at night it stays warm at around 20 °C. The sea averages 26.9 °C – lovely and warm for swimming. Expect around 5.2 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 144 mm in total. On about 13 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, September is a good month for a holiday in Onomichi.
Onomichi in September74October24° · Sea 24° · 5.4 h
In October, Onomichi is warm: daytime highs average 24 °C, and nights cool down to about 13 °C. The sea averages 23.8 °C – pleasant for swimming. Expect around 5.4 hours of sunshine a day. Rain falls on about 8 days, adding up to 111 mm. All in all, October is a good month for a holiday in Onomichi.
Onomichi in October33November18° · Sea 20° · 4.9 h
In November, Onomichi is mild: daytime highs average 18 °C, and nights cool down to about 7 °C. The sea averages 19.7 °C – bracing, so a wetsuit helps for longer swims. Expect around 4.9 hours of sunshine a day. Rain falls on about 6 days, adding up to 60 mm. All in all, November is not an ideal month for a holiday in Onomichi.
Onomichi in November23December12° · Sea 16° · 4.5 h
In December, Onomichi is cool: daytime highs average 12 °C, and nights cool down to about 2 °C. The sea averages 16.3 °C – swimming is only for the hardy. Expect around 4.5 hours of sunshine a day. Rain falls on about 5 days, adding up to 46 mm. All in all, December is not an ideal month for a holiday in Onomichi.
Onomichi in DecemberClimate in detail
Year & climate table
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Onomichi
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
- Warm 20–24°
- Hot 24° and more
- muggy month (15+ muggy days)
CoolOctober: nights around 13°. A duvet at night and a jumper for the evening. Muggy on about 3 days (dew point 18 °C or more).
The coolest nights are in January (0°), the warmest in August (24°). Tropical nights of 20 °C and more are the rule from July to September; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) in June. Nights fall below 8 °C on average from November to March, so the room should be heated. It is muggy (dew point 18 °C or more) on about 101 days a year, mostly from June to September.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 23 | 10° | 0° | 13.8° | 4.5 h | 5 | 43 |
| FebruaryFeb | 22 | 11° | 1° | 12.5° | 4.9 h | 7 | 56 |
| MarchMar | 21 | 15° | 4° | 12.9° | 5.6 h | 10 | 95 |
| AprilApr | 31 | 21° | 9° | 14.9° | 6.3 h | 10 | 109 |
| MayMay | 63 | 25° | 14° | 18.0° | 6.7 h | 10 | 131 |
| JuneJun | 68 | 28° | 19° | 21.7° | 5.1 h | 12 | 178 |
| JulyJul | 72 | 32° | 23° | 25.4° | 5.6 h | 12 | 180 |
| AugustAug | 70 | 34° | 24° | 27.8° | 6.7 h | 10 | 116 |
| SeptemberSep | 78 | 30° | 20° | 26.9° | 5.2 h | 10 | 144 |
| OctoberOct | 74 | 24° | 13° | 23.8° | 5.4 h | 8 | 111 |
| NovemberNov | 33 | 18° | 7° | 19.7° | 4.9 h | 6 | 60 |
| DecemberDec | 23 | 12° | 2° | 16.3° | 4.5 h | 5 | 46 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
34.42° N, 133.20° E · 52 m · Asia/Tokyo
Sea temperature
Sea temperature in Onomichi
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 22.9 – 24.7 °C
Swimming season: Jun – Oct
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Onomichi ranges from 12.5 °C in February to 27.8 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to October.
From October to February the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in August, eight out of ten years were between 26.7 and 28.9 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 13.8° | 12.1° | 16.5° | cold |
| FebruaryFeb | 12.5° | 10.4° | 15.8° | cold |
| MarchMar | 12.9° | 11.0° | 16.0° | cold |
| AprilApr | 14.9° | 13.5° | 16.8° | cold |
| MayMay | 18.0° | 17.2° | 18.7° | fresh |
| JuneJun | 21.7° | 21.1° | 22.3° | refreshing |
| JulyJul | 25.4° | 24.3° | 26.5° | pleasant |
| AugustAug | 27.8° | 26.7° | 28.9° | warm |
| SeptemberSep | 26.9° | 26.1° | 28.4° | warm |
| OctoberOct | 23.8° | 22.9° | 24.7° | pleasant |
| NovemberNov | 19.7° | 19.1° | 20.3° | fresh |
| DecemberDec | 16.3° | 15.2° | 17.6° | cold |
Sunshine
Sunshine hours in Onomichi
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 5.4 of 11.4 hours of daylight in Onomichi, 47 % of the daylight hours.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
Rain
Rain in Onomichi: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Onomichi has about 8 rainy days with 111 mm of rain in total.
UV index
UV index in Onomichi
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 5 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 11).
Minutes until sunburn in October
- Very fair skin
- about 25 min
- Fair skin
- about 30 min
- Light brown skin
- about 45 min
- Olive skin
- about 55 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Wind & clouds
Wind and clouds in Onomichi
How breezy and how cloudy Onomichi is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Onomichi typically peaks at 15 km/h during the day: Beaufort 3, gentle breeze.
Breezy months for windsurfing and kiting
The daily breeze rarely reaches Beaufort 4 (20 km/h), so wind sports depend on single windy days.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 50 % of the sky over Onomichi: variable cloud, with about 5.4 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat & humidity
Heat and humidity in Onomichi
How often the day gets hot in Onomichi (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Onomichi has about 0 hot days, with an average daytime high of 24 °C: pleasant. Heat plays no part this month.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Planning a trip to Onomichi
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Onomichi in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Onomichi has its best school-holiday weather during October half-term (score 74) and its weakest during the Christmas holidays (score 23).
- 28
Easter holidays
Mar – Apr
Poor
- 19 °C by day
- Sea 14 °C
- 6.1 h of sun a day
- 10 rainy days a month
- 64
May half-term
May – Jun
Good
- 26 °C by day
- Sea 19 °C
- 6.4 h of sun a day
- 10 rainy days a month
Good for: Sightseeing & walks
- 71
Summer holidays
Jul – Aug
Good
- 33 °C by day
- Sea 27 °C
- 6.3 h of sun a day
- 11 rainy days a month
Keep in mind: Peak heat, Storm season
- 74
October half-term
Oct
GoodBest holidays
- 24 °C by day
- Sea 24 °C
- 5.4 h of sun a day
- 8 rainy days a month
Good for: Beach & swimming, Sightseeing & walks
Keep in mind: Storm season
- 23
Christmas holidays
Dec – Jan
Poor
- 11 °C by day
- Sea 15 °C
- 4.5 h of sun a day
- 5 rainy days a month
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 11 h 55 min
- Distance
- 9,450 km
- Time zone
- UTC+9
- Jet lag
- About 8 days (8 h east)
Rule of thumb for flying east: for a few days before, go to bed and get up a little earlier, and get plenty of morning light at your destination.
Most routes need a change of planes, which adds time.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Good to know: Japan
- Currency
- Japanese Yen (JPY)
- Language
- Japanese
- Sockets
- Type A, B · 100 V
- Traffic
- Drives on the left
- Dialling code
- +81
UK plugs need a travel adapter
Only 100 V: chargers marked 100–240 V work, other devices need a voltage converter.
Sources: GeoNames (CC BY 4.0) and Wikidata (CC0). Please check details before you travel.
Storm season
Onomichi lies in an area that Pacific typhoons can reach. The typhoon season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
- January
- February
- March
- April
- May
- June: Season
- July: Season
- August: Peak
- September: Peak
- October: Peak
- November: Season
- December
Official season dates of the regional warning centres (NOAA, JMA, IMD, Météo-France, BoM, Fiji Meteorological Service); not a forecast.
Compare & alternatives
Compare with another place
Onomichi compared
Put Onomichi side by side with another destination.
Onomichi vs Fukuyama
In October the holiday weather in Onomichi and Fukuyama is about equally good (score 74 vs 75). During the day it is about as warm in Fukuyama as in Onomichi. The sea is about equally warm.
| in October | Onomichi | Fukuyama |
|---|---|---|
| Holiday weather score | 74 | 75 |
| Daytime high | 24° | 24° |
| Sea | 24° | 24° |
| Sunshine | 5 h | 5 h |
| Rainy days | 8 | 8 |
| Best time | May – Oct | Apr – May, Oct – Nov |
Through the year
Best places in the country
Japan in October: the best places
In October, Onomichi ranks 20 among the 31 nearest destinations in this country.
- Kure23°23°81
- 2Hiroshima24°23°81
- 3Yamaguchi23°80
- 4Ube24°23°80
- 5Shimonoseki24°23°80
- 6Fukuyama24°24°79
- 7Imabari24°24°79
- 8Ōita24°23°79
- 20OnomichiThis page24°24°74
Places nearby
Near Onomichi
Other destinations close by.
Places with a similar climate
Places with a climate like Onomichi
Destinations whose weather through the year is closest to Onomichi's – good alternatives.
Frequently asked questions about Onomichi
When is the best time to visit Onomichi?
The best time to visit Onomichi is from May to October. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Onomichi?
The sea temperature in Onomichi ranges from 12.5 °C in February to 27.8 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to October.
Can you swim in Onomichi in October?
Yes. In October the sea averages 23.8 °C – pleasant for swimming.
What is the warmest month in Onomichi?
August is the warmest month, with average highs of 34 °C and nights around 24 °C. January is the coolest month at 10 °C.
When does it rain most in Onomichi?
The wettest month is July with 180 mm of precipitation. The driest month is January with 43 mm.
How many hours of sunshine does Onomichi get?
Onomichi gets around 1,990 hours of sunshine a year. The sunniest month is May with 6.7 hours a day; in January there are 4.5 hours a day.
What time zone is Onomichi in?
Onomichi is on UTC+9 all year.
How long is the flight from London to Onomichi?
A nonstop flight from London to Onomichi takes about 11 h 55 min, for a straight-line distance of about 9,450 km. Most routes need a change of planes, which adds time.
When is typhoon season in Onomichi?
Onomichi lies in an area that Pacific typhoons can reach. The typhoon season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
Which school holidays are best for Onomichi?
Onomichi has its best school-holiday weather during October half-term (score 74) and its weakest during the Christmas holidays (score 23). Holiday ratings (0–100): Easter holidays 28, May half-term 64, summer holidays 71, October half-term 74, Christmas holidays 23.