AI-generatedYamaguchi at a glance
- Best time
- Apr – May, Oct – Nov
- Warmest month
- Aug · 32°
- Sunshine a year
- 1,970 h
- Rain a year
- 1,666 mm
- Climate
- Temperate
- Time zone
- UTC+9
- Elevation
- 157 m
Climate in Yamaguchi
Yamaguchi has a temperate climate with warm summers and cool winters. August is the warmest month with average highs of 32 °C, while January is the coolest at 9 °C. With around 1,970 hours of sunshine a year, Yamaguchi is moderately sunny; May is the sunniest month with 6.7 hours a day.
Holiday weather through the year
Best time to visit Yamaguchi
The best time to visit Yamaguchi is from April to May and from October to November. In October, though, the typhoon season is at its peak: check the forecast before you go. For sightseeing, day trips and hiking, conditions are most comfortable from April to May and from October to November. Rain is frequent from June to September; the wettest month is July with 271 mm.
Yamaguchi through the seasons
How the weather changes over the seasons, with averages for each.
Yamaguchi in spring
Mar – May
Good
- 14–24 °C by day
- 6.2 h of sun a day
- 33 rainy days in all
Yamaguchi in summer
Jun – Aug
Fair
- 27–32 °C by day
- 5.8 h of sun a day
- 46 rainy days in all
Yamaguchi in autumn
Sep – Nov
Good
- 17–29 °C by day
- 5.3 h of sun a day
- 29 rainy days in all
Yamaguchi in winter
Dec – Feb
Poor
- 9–11 °C by day
- 4.2 h of sun a day
- 29 rainy days in all
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Apr – May, Oct – Nov
15–28 °C and not too much rain
Rainy months
Jun – Sep
Rainy season or more than 12 rainy days
Find your perfect month
Tell us what you like and we rate every month in Yamaguchi for you.
Your best months: May, October
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Excellent
Best time to visit: April – May, October – November
October is the peak of the typhoon season Hurricane season
Good forSightseeing & walks
Keep in mindStorm season
A typical day in October
- Morning, 08:00: about 17°
- Midday, 13:00: about 23°
- Afternoon, 16:00: about 22°
- Evening, 20:00: about 18°
- Night, 23:00: about 16°
06:1817:41
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 06:03–06:52 · evening 17:08–17:57
- Blue hour
- Morning 05:53–06:03 · evening 17:57–18:07
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 Yamaguchi 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 20° at the end. The days get 1.0 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 26° | 20° |
| Night-time low | 16° | 10° |
| Daylight | 11.9 h | 10.9 h |
What is the weather like in Yamaguchi in October?
In October, Yamaguchi is warm: daytime highs average 23 °C, and nights cool down to about 13 °C. Expect around 5.7 hours of sunshine a day. Rain falls on about 8 days, adding up to 96 mm. All in all, October is an excellent month for a holiday in Yamaguchi.
More details for October
- Daylight
- 11 h 23 min06:18 – 17:41
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 4 daysdew point 18 °C or moreAll months
- Wind
- 13 km/haverage daily peakAll months
- Cloud cover
- 51 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+9offset from UTC
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %45 %
- Few rainy daysweight 30 %70 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Compare two months in Yamaguchi
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 May bring similar holiday weather to Yamaguchi (score 80 and 78). In May, days are 1 °C warmer than in October. May has 3 more rainy days. The sun shines an hour longer a day in May.
| Month | October | May |
|---|---|---|
| Holiday weather score | 80 | 78 |
| Daytime high | 23° | 24° |
| Night-time low | 13° | 14° |
| Sunshine | 5.7 h | 6.7 hbetter |
| Rainy days | 8better | 11 |
| Rainfall | 96 mmbetter | 155 mm |
| Muggy days | 4 | 2better |
Based on the climate averages 1996–2025.
Yamaguchi month by month
The typical weather for every month at a glance.
26January9° · 3.9 h
In January, Yamaguchi is cold: daytime highs average 9 °C, and nights cool down to about 1 °C. The sun is scarce, with only about 3.9 hours a day. Rain is frequent, with about 10 rainy days and 61 mm in total. All in all, January is not an ideal month for a holiday in Yamaguchi.
Yamaguchi in January35February10° · 4.7 h
In February, Yamaguchi is cool: daytime highs average 10 °C, and nights cool down to about 1 °C. Expect around 4.7 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 72 mm in total. All in all, February is not an ideal month for a holiday in Yamaguchi.
Yamaguchi in February54March14° · 5.5 h
In March, Yamaguchi is cool: daytime highs average 14 °C, and nights cool down to about 4 °C. Expect around 5.5 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 117 mm in total. All in all, March is a so-so month for a holiday in Yamaguchi.
Yamaguchi in March77April20° · 6.4 h
In April, Yamaguchi is mild: daytime highs average 20 °C, and nights cool down to about 9 °C. Expect around 6.4 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 132 mm in total. All in all, April is a good month for a holiday in Yamaguchi.
Yamaguchi in April78May24° · 6.7 h
In May, Yamaguchi is warm: daytime highs average 24 °C, and nights cool down to about 14 °C. The sun shines for around 6.7 hours a day. Rain is frequent, with about 11 rainy days and 155 mm in total. All in all, May is a good month for a holiday in Yamaguchi.
Yamaguchi in May64June27° · 5.2 h
In June, Yamaguchi is hot: daytime highs average 27 °C, and nights cool down to about 18 °C. Expect around 5.2 hours of sunshine a day. It rains often – on about 15 days, adding up to 243 mm. The air is often humid and muggy. All in all, June is a good month for a holiday in Yamaguchi.
Yamaguchi in June37July31° · 5.6 h
In July, Yamaguchi is hot: daytime highs average 31 °C, and even at night it stays warm at around 23 °C. Expect around 5.6 hours of sunshine a day. It rains often – on about 17 days, adding up to 271 mm. On about 20 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is not an ideal month for a holiday in Yamaguchi.
Yamaguchi in July35August32° · 6.7 h
In August, Yamaguchi is hot: daytime highs average 32 °C, and even at night it stays warm at around 24 °C. The sun shines for around 6.7 hours a day. It rains often – on about 15 days, adding up to 185 mm. On about 27 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is not an ideal month for a holiday in Yamaguchi.
Yamaguchi in August59September29° · 5.5 h
In September, Yamaguchi is hot: daytime highs average 29 °C, and even at night it stays warm at around 20 °C. Expect around 5.5 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 189 mm in total. On about 10 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, September is a so-so month for a holiday in Yamaguchi.
Yamaguchi in September80October23° · 5.7 h
In October, Yamaguchi is warm: daytime highs average 23 °C, and nights cool down to about 13 °C. Expect around 5.7 hours of sunshine a day. Rain falls on about 8 days, adding up to 96 mm. All in all, October is an excellent month for a holiday in Yamaguchi.
Yamaguchi in October73November17° · 4.8 h
In November, Yamaguchi is mild: daytime highs average 17 °C, and nights cool down to about 8 °C. Expect around 4.8 hours of sunshine a day. Rain falls on about 8 days, adding up to 81 mm. All in all, November is a good month for a holiday in Yamaguchi.
Yamaguchi in November38December11° · 4.0 h
In December, Yamaguchi is cool: daytime highs average 11 °C, and nights cool down to about 3 °C. Expect around 4.0 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 64 mm in total. All in all, December is not an ideal month for a holiday in Yamaguchi.
Yamaguchi in DecemberClimate in detail
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Yamaguchi
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 4 days (dew point 18 °C or more).
The coolest nights are in January (1°), 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 December to March, so the room should be heated. It is muggy (dew point 18 °C or more) on about 104 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 | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|
| JanuaryJan | 26 | 9° | 1° | 3.9 h | 10 | 61 |
| FebruaryFeb | 35 | 10° | 1° | 4.7 h | 10 | 72 |
| MarchMar | 54 | 14° | 4° | 5.5 h | 11 | 117 |
| AprilApr | 77 | 20° | 9° | 6.4 h | 11 | 132 |
| MayMay | 78 | 24° | 14° | 6.7 h | 11 | 155 |
| JuneJun | 64 | 27° | 18° | 5.2 h | 15 | 243 |
| JulyJul | 37 | 31° | 23° | 5.6 h | 17 | 271 |
| AugustAug | 35 | 32° | 24° | 6.7 h | 15 | 185 |
| SeptemberSep | 59 | 29° | 20° | 5.5 h | 13 | 189 |
| OctoberOct | 80 | 23° | 13° | 5.7 h | 8 | 96 |
| NovemberNov | 73 | 17° | 8° | 4.8 h | 8 | 81 |
| DecemberDec | 38 | 11° | 3° | 4.0 h | 10 | 64 |
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
34.18° N, 131.47° E · 157 m · Asia/Tokyo
Sunshine hours in Yamaguchi
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 5.7 of 11.4 hours of daylight in Yamaguchi, 50 % 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 in Yamaguchi: 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, Yamaguchi has about 8 rainy days with 96 mm of rain in total.
UV index in Yamaguchi
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 and clouds in Yamaguchi
How breezy and how cloudy Yamaguchi 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 Yamaguchi typically peaks at 13 km/h during the day: Beaufort 3, gentle breeze.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 51 % of the sky over Yamaguchi: variable cloud, with about 5.7 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 and humidity in Yamaguchi
How often the day gets hot in Yamaguchi (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, Yamaguchi has about 0 hot days, with an average daytime high of 23 °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 Yamaguchi
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Yamaguchi 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.
Yamaguchi has its best school-holiday weather during October half-term (score 80) and its weakest during the Christmas holidays (score 32).
- 70
Easter holidays
Mar – Apr
Good
- 18 °C by day
- 6.1 h of sun a day
- 11 rainy days a month
- 75
May half-term
May – Jun
Good
- 25 °C by day
- 6.4 h of sun a day
- 11 rainy days a month
Good for: Sightseeing & walks
- 36
Summer holidays
Jul – Aug
Poor
- 32 °C by day
- 6.3 h of sun a day
- 16 rainy days a month
Keep in mind: Frequent rain, Storm season
- 80
October half-term
Oct
ExcellentBest holidays
- 23 °C by day
- 5.7 h of sun a day
- 8 rainy days a month
Good for: Sightseeing & walks
Keep in mind: Storm season
- 32
Christmas holidays
Dec – Jan
Poor
- 10 °C by day
- 4.0 h of sun a day
- 10 rainy days a month
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 11 h 50 min
- Distance
- 9,400 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.
Storm season
Yamaguchi 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
Yamaguchi compared
Put Yamaguchi side by side with another destination.
Yamaguchi vs Shimonoseki
In October the holiday weather in Yamaguchi and Shimonoseki is about equally good (score 80 vs 80). During the day Shimonoseki is 1 °C warmer than Yamaguchi.
| in October | Yamaguchi | Shimonoseki |
|---|---|---|
| Holiday weather score | 80 | 80 |
| Daytime high | 23° | 24° |
| Sea | no sea nearby | 23° |
| Sunshine | 6 h | 6 h |
| Rainy days | 8 | 8 |
| Best time | Apr – May, Oct – Nov | Apr – May, Oct – Nov |
Through the year
Japan in October: the best places
In October, Yamaguchi ranks 6 among the 31 nearest destinations in this country.
- Sasebo24°24°82
- 2Hiroshima24°23°81
- 3Kure23°23°81
- 4Fukuoka24°23°81
- 5Nagasaki24°24°81
- 6YamaguchiThis page23°80
- 7Shimonoseki24°23°80
- 8Kumamoto24°23°80
Near Yamaguchi
Other destinations close by.
Places with a climate like Yamaguchi
Destinations whose weather through the year is closest to Yamaguchi's – good alternatives.
Frequently asked questions about Yamaguchi
When is the best time to visit Yamaguchi?
The best time to visit Yamaguchi is from April to May and from October to November. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
What is the warmest month in Yamaguchi?
August is the warmest month, with average highs of 32 °C and nights around 24 °C. January is the coolest month at 9 °C.
When does it rain most in Yamaguchi?
Rain is frequent from June to September; the wettest month is July with 271 mm. The driest month is January with 61 mm.
How many hours of sunshine does Yamaguchi get?
Yamaguchi gets around 1,970 hours of sunshine a year. The sunniest month is May with 6.7 hours a day; in January there are 3.9 hours a day.
What time zone is Yamaguchi in?
Yamaguchi is on UTC+9 all year.
How long is the flight from London to Yamaguchi?
A nonstop flight from London to Yamaguchi takes about 11 h 50 min, for a straight-line distance of about 9,400 km. Most routes need a change of planes, which adds time.
When is typhoon season in Yamaguchi?
Yamaguchi 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 Yamaguchi?
Yamaguchi has its best school-holiday weather during October half-term (score 80) and its weakest during the Christmas holidays (score 32). Holiday ratings (0–100): Easter holidays 70, May half-term 75, summer holidays 36, October half-term 80, Christmas holidays 32.