AI-generatedHilo, Hawaii at a glance
- Best time
- All year
- Warmest month
- Aug · 26°
- Warmest sea
- Sep · 26.6°
- Sunshine a year
- 2,750 h
- Rain a year
- 1,408 mm
- Climate
- Tropical
- Time zone
- UTC−10
- Elevation
- 18 m
Climate in Hilo, Hawaii
Hilo, Hawaii has a tropical climate: it is warm all year round, and the seasons differ mainly in how much rain falls. August is the warmest month with average highs of 26 °C, while February is the coolest at 23 °C. With around 2,750 hours of sunshine a year, Hilo, Hawaii is sunny; July is the sunniest month with 8.8 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Good
Best time to visit: January – December
October is in the hurricane season
Keep in mindFrequent rainStorm season
A typical day in October
- Morning, 08:00: about 23°
- Midday, 13:00: about 26°
- Afternoon, 16:00: about 26°
- Evening, 20:00: about 24°
- Night, 23:00: about 23°
06:1417:58
Warm enough for a T-shirt in the evening.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 06:01–06:44 · evening 17:28–18:11
- Blue hour
- Morning 05:52–06:01 · evening 18:11–18:20
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.
What is the weather like in Hilo, Hawaii in October?
In October, Hilo, Hawaii is warm: daytime highs average 26 °C, and even at night it stays warm at around 21 °C. The sea averages 26.5 °C – lovely and warm for swimming. The sun shines for around 7 hours a day. It is the rainy season: rain falls on about 20 days, totalling 97 mm. The air is often humid and muggy. All in all, October is a good month for a holiday in Hilo, Hawaii.
More details for October
- Daylight
- 11 h 43 min06:14 – 17:58
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 30 daysdew point 18 °C or moreAll months
- Wind
- 17 km/haverage daily peakAll months
- Cloud cover
- 60 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−10Pacific/Honolulu
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %73 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in October
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Sea temperature in Hilo, Hawaii
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 25.7 – 27.3 °C
Swimming season: All year
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Hilo, Hawaii ranges from 24.1 °C in March to 26.6 °C in September. At 20 °C and more, the sea is warm enough for swimming all year round.
The sea warms up slowly: it is warmest in September, while the air already peaks in August. The sea temperature varies from year to year: in September, eight out of ten years were between 25.7 and 27.4 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 24.5° | 23.8° | 25.2° | pleasant |
| FebruaryFeb | 24.2° | 23.5° | 24.8° | pleasant |
| MarchMar | 24.1° | 23.5° | 24.9° | pleasant |
| AprilApr | 24.4° | 23.6° | 25.2° | pleasant |
| MayMay | 24.9° | 24.2° | 25.7° | pleasant |
| JuneJun | 25.5° | 24.5° | 26.1° | pleasant |
| JulyJul | 25.9° | 25.2° | 26.6° | pleasant |
| AugustAug | 26.3° | 25.5° | 27.0° | warm |
| SeptemberSep | 26.6° | 25.7° | 27.4° | warm |
| OctoberOct | 26.5° | 25.7° | 27.3° | warm |
| NovemberNov | 25.9° | 25.1° | 26.6° | pleasant |
| DecemberDec | 25.0° | 24.4° | 25.8° | pleasant |
Sunshine hours in Hilo, Hawaii
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 7.4 of 11.7 hours of daylight in Hilo, Hawaii, 63 % of the day.
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.
UV index in Hilo, Hawaii
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 9 · very highStay in the shade around midday; SPF 50, clothing, hat and sunglasses.
The sun is strongest in May (UV 12).
Minutes until sunburn in October
- Very fair skin
- about 15 min
- Fair skin
- about 20 min
- Light brown skin
- about 25 min
- Olive skin
- about 30 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, 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.
Rain in Hilo, Hawaii: 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, Hilo, Hawaii has about 20 rainy days with 97 mm of rain in total.
Wind and clouds in Hilo, Hawaii
How breezy and how cloudy Hilo, Hawaii 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 Hilo, Hawaii typically peaks at 17 km/h during the day: Beaufort 3, light 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 60 % of the sky over Hilo, Hawaii: variable cloud, with about 7.4 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 and humidity in Hilo, Hawaii
How often the day gets hot in Hilo, Hawaii (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, Hilo, Hawaii has about 0 hot days, with an average daytime high of 26 °C: often muggy. The air feels warmer than the thermometer says: light, airy clothes and slow days help.
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
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Hilo, Hawaii
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Pleasant 15–20°
- Warm 20–24°
- muggy month (10+ muggy days)
WarmOctober: nights around 21°. Tropical nights: a fan or air conditioning helps. Muggy on about 30 days (dew point 18 °C or more).
The coolest nights are in February (19°), the warmest in August (22°). Tropical nights of 20 °C and more are the rule from April to December; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) from January to March. It is muggy (dew point 18 °C or more) on about 258 days a year, mostly from March to January.
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 | 70 | 24° | 19° | 24.5° | 7.1 h | 15 | 112 |
| FebruaryFeb | 66 | 23° | 19° | 24.2° | 6.7 h | 16 | 138 |
| MarchMar | 62 | 24° | 19° | 24.1° | 6.5 h | 21 | 154 |
| AprilApr | 65 | 24° | 20° | 24.4° | 7.6 h | 23 | 123 |
| MayMay | 67 | 25° | 20° | 24.9° | 8.0 h | 22 | 108 |
| JuneJun | 69 | 25° | 21° | 25.5° | 8.7 h | 23 | 86 |
| JulyJul | 69 | 26° | 21° | 25.9° | 8.8 h | 24 | 97 |
| AugustAug | 68 | 26° | 22° | 26.3° | 8.4 h | 23 | 131 |
| SeptemberSep | 66 | 26° | 22° | 26.6° | 7.9 h | 21 | 83 |
| OctoberOct | 65 | 26° | 21° | 26.5° | 7.4 h | 20 | 97 |
| NovemberNov | 62 | 25° | 21° | 25.9° | 6.6 h | 19 | 128 |
| DecemberDec | 62 | 24° | 20° | 25.0° | 6.6 h | 20 | 153 |
Climate averages 1996–2025, 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
19.73° N, 155.09° W · 18 m · Pacific/Honolulu
Best time to visit Hilo, Hawaii
The best time to visit Hilo, Hawaii is all year round. The sea stays too cool for a classic beach holiday: even in September it only reaches 26.6 °C. The wettest month is March with 154 mm of precipitation.
Hilo, Hawaii through the seasons
How the weather changes over the seasons, with averages for each.
Hilo, Hawaii in spring
Mar – May
Good
- 24–25 °C by day
- Sea 25 °C
- 7 h of sun a day
- 66 rainy days in all
Hilo, Hawaii in summer
Jun – Aug
Good
- 25–26 °C by day
- Sea 26 °C
- 9 h of sun a day
- 70 rainy days in all
Hilo, Hawaii in autumn
Sep – Nov
Good
- 25–26 °C by day
- Sea 26 °C
- 7 h of sun a day
- 60 rainy days in all
Hilo, Hawaii in winter
Dec – Feb
Good
- 23–24 °C by day
- Sea 25 °C
- 7 h of sun a day
- 51 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Hilo, Hawaii for you.
Your best months: January – March
Based on the climate averages; tap a month to see its details.
Compare two months in Hilo, Hawaii
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
January has the better holiday weather in Hilo, Hawaii: score 70 against 65. In January, days are 2 °C cooler than in October. The sea is 2 °C cooler in January. January has 5 fewer rainy days.
| Month | October | January |
|---|---|---|
| Weather score | 65 | 70better |
| Day high | 26° | 24° |
| Night low | 21° | 19° |
| Sea | 26.5° | 24.5° |
| Sunshine | 7.4 h | 7.1 h |
| Rainy days | 20 | 15better |
| Rainfall | 97 mmbetter | 112 mm |
| Muggy days | 30 | 12better |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
No month
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
No month
15–28 °C and not too much rain
Rainy months
All year
12 or more rainy days
Hilo, Hawaii month by month
The typical weather for every month at a glance.
70January24° · Sea 25° · 7 h
In January, Hilo, Hawaii is warm: daytime highs average 24 °C, and nights cool down to about 19 °C. The sea averages 24.5 °C – pleasant for swimming. The sun shines for around 7 hours a day. It is the rainy season: rain falls on about 15 days, totalling 112 mm. All in all, January is a good month for a holiday in Hilo, Hawaii.
Hilo, Hawaii in January66February23° · Sea 24° · 7 h
In February, Hilo, Hawaii is warm: daytime highs average 23 °C, and nights cool down to about 19 °C. The sea averages 24.2 °C – pleasant for swimming. The sun shines for around 7 hours a day. It is the rainy season: rain falls on about 16 days, totalling 138 mm. All in all, February is a good month for a holiday in Hilo, Hawaii.
Hilo, Hawaii in February62March24° · Sea 24° · 7 h
In March, Hilo, Hawaii is warm: daytime highs average 24 °C, and nights cool down to about 19 °C. The sea averages 24.1 °C – pleasant for swimming. The sun shines for around 7 hours a day. It is the rainy season: rain falls on about 21 days, totalling 154 mm. All in all, March is a good month for a holiday in Hilo, Hawaii.
Hilo, Hawaii in March65April24° · Sea 24° · 8 h
In April, Hilo, Hawaii is warm: daytime highs average 24 °C, and nights cool down to about 20 °C. The sea averages 24.4 °C – pleasant for swimming. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 23 days, totalling 123 mm. The air is often humid and muggy. All in all, April is a good month for a holiday in Hilo, Hawaii.
Hilo, Hawaii in April67May25° · Sea 25° · 8 h
In May, Hilo, Hawaii is warm: daytime highs average 25 °C, and even at night it stays warm at around 20 °C. The sea averages 24.9 °C – pleasant for swimming. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 22 days, totalling 108 mm. The air is often humid and muggy. All in all, May is a good month for a holiday in Hilo, Hawaii.
Hilo, Hawaii in May69June25° · Sea 26° · 9 h
In June, Hilo, Hawaii is warm: daytime highs average 25 °C, and even at night it stays warm at around 21 °C. The sea averages 25.5 °C – pleasant for swimming. The sun shines for around 9 hours a day. It is the rainy season: rain falls on about 23 days, totalling 86 mm. The air is often humid and muggy. All in all, June is a good month for a holiday in Hilo, Hawaii.
Hilo, Hawaii in June69July26° · Sea 26° · 9 h
In July, Hilo, Hawaii is warm: daytime highs average 26 °C, and even at night it stays warm at around 21 °C. The sea averages 25.9 °C – pleasant for swimming. The sun shines for around 9 hours a day. It is the rainy season: rain falls on about 24 days, totalling 97 mm. The air is often humid and muggy. All in all, July is a good month for a holiday in Hilo, Hawaii.
Hilo, Hawaii in July68August26° · Sea 26° · 8 h
In August, Hilo, Hawaii is warm: daytime highs average 26 °C, and even at night it stays warm at around 22 °C. The sea averages 26.3 °C – lovely and warm for swimming. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 23 days, totalling 131 mm. The air is often humid and muggy. All in all, August is a good month for a holiday in Hilo, Hawaii.
Hilo, Hawaii in August66September26° · Sea 27° · 8 h
In September, Hilo, Hawaii is warm: daytime highs average 26 °C, and even at night it stays warm at around 22 °C. The sea averages 26.6 °C – lovely and warm for swimming. The sun shines for around 8 hours a day. It is the rainy season: rain falls on about 21 days, totalling 83 mm. The air is often humid and muggy. All in all, September is a good month for a holiday in Hilo, Hawaii.
Hilo, Hawaii in September65October26° · Sea 27° · 7 h
In October, Hilo, Hawaii is warm: daytime highs average 26 °C, and even at night it stays warm at around 21 °C. The sea averages 26.5 °C – lovely and warm for swimming. The sun shines for around 7 hours a day. It is the rainy season: rain falls on about 20 days, totalling 97 mm. The air is often humid and muggy. All in all, October is a good month for a holiday in Hilo, Hawaii.
Hilo, Hawaii in October62November25° · Sea 26° · 7 h
In November, Hilo, Hawaii is warm: daytime highs average 25 °C, and even at night it stays warm at around 21 °C. The sea averages 25.9 °C – pleasant for swimming. The sun shines for around 7 hours a day. It is the rainy season: rain falls on about 19 days, totalling 128 mm. The air is often humid and muggy. All in all, November is a good month for a holiday in Hilo, Hawaii.
Hilo, Hawaii in November62December24° · Sea 25° · 7 h
In December, Hilo, Hawaii is warm: daytime highs average 24 °C, and nights cool down to about 20 °C. The sea averages 25.0 °C – pleasant for swimming. The sun shines for around 7 hours a day. It is the rainy season: rain falls on about 20 days, totalling 153 mm. The air is often humid and muggy. All in all, December is a good month for a holiday in Hilo, Hawaii.
Hilo, Hawaii in DecemberHilo, Hawaii compared
Put Hilo, Hawaii side by side with another destination.
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Hilo vs. Kailua-Kona
In October the holiday weather in Hilo and Kailua-Kona is about equally good (score 65 vs. 67). During the day Kailua-Kona is 1 °C cooler than Hilo. The sea is about equally warm. Kailua-Kona gets one more hour of sunshine a day.
| in October | Hilo | Kailua-Kona |
|---|---|---|
| Holiday score | 65 | 67 |
| Daytime high | 26° | 25° |
| Sea | 27° | 27° |
| Sunshine | 7 h | 8 h |
| Rainy days | 20 | 26 |
| Best time | All year | Apr – Nov |
Through the year
USA in October: the best places
In October, Hilo, Hawaii ranks 26 among the 31 nearest destinations in this country.
- Mariposa (Yosemite)23°98
- 2Long Beach25°19°98
- 3Los Angeles26°19°98
- 4Lahaina28°27°97
- 5Lanai25°27°96
- 6San Jose23°96
- 7Sacramento25°96
- 8Kihei29°27°95
- 26HiloThis page26°27°65
Planning a trip to Hilo, Hawaii
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Hilo, Hawaii 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.
Hilo, Hawaii has similar weather in all school holidays (scores 64 to 68).
- 64
Easter holidays
Mar – Apr
Good
- 24 °C by day
- Sea 24 °C
- 7.3 h of sun a day
- 22 rainy days a month
Keep in mind: Frequent rain
- 67
May half-term
May – Jun
Good
- 25 °C by day
- Sea 25 °C
- 8.1 h of sun a day
- 22 rainy days a month
Keep in mind: Frequent rain
- 68
Summer holidays
Jul – Aug
Good
- 26 °C by day
- Sea 26 °C
- 8.5 h of sun a day
- 23 rainy days a month
Keep in mind: Frequent rain, Storm season
- 65
October half-term
Oct
Good
- 26 °C by day
- Sea 27 °C
- 7.4 h of sun a day
- 20 rainy days a month
Keep in mind: Frequent rain, Storm season
- 66
Christmas holidays
Dec – Jan
Good
- 24 °C by day
- Sea 25 °C
- 6.9 h of sun a day
- 17 rainy days a month
Keep in mind: Frequent rain
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 14 h 35 min
- Distance
- 11,720 km
- Time zone
- UTC−10
- Jet lag
- About 7 days (11 h west)
Rule of thumb for flying west: for a few days before, stay up a little later, and get afternoon and evening 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
Hilo, Hawaii lies in an area that Central Pacific hurricanes can reach. The hurricane season runs from June to November, with most storms from August to September. 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: Season
- November: Season
- December
Official season dates of the regional warning centres (NOAA, JMA, IMD, Météo-France, BoM); not a forecast.
Frequently asked questions about Hilo, Hawaii
When is the best time to visit Hilo, Hawaii?
The best time to visit Hilo, Hawaii is all year round. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Hilo, Hawaii?
The sea temperature in Hilo, Hawaii ranges from 24.1 °C in March to 26.6 °C in September. At 20 °C and more, the sea is warm enough for swimming all year round.
Can you swim in Hilo, Hawaii in October?
Yes. In October the sea averages 26.5 °C – lovely and warm for swimming.
What is the warmest month in Hilo, Hawaii?
August is the warmest month, with average highs of 26 °C and nights around 22 °C. February is the coolest month at 23 °C.
When does it rain most in Hilo, Hawaii?
The wettest month is March with 154 mm of precipitation. The driest month is September with 83 mm.
How many hours of sunshine does Hilo, Hawaii get?
Hilo, Hawaii gets around 2,750 hours of sunshine a year. The sunniest month is July with 8.8 hours a day; in March there are 6.5 hours a day.
What time zone is Hilo, Hawaii in?
Hilo, Hawaii uses the time zone Pacific/Honolulu, at UTC−10 all year.
How long is the flight from London to Hilo, Hawaii?
A nonstop flight from London to Hilo, Hawaii takes about 14 h 35 min, for a straight-line distance of about 11,720 km. Most routes need a change of planes, which adds time.
When is hurricane season in Hilo, Hawaii?
Hilo, Hawaii lies in an area that Central Pacific hurricanes can reach. The hurricane season runs from June to November, with most storms from August to September. 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 Hilo, Hawaii?
Hilo, Hawaii has similar weather in all school holidays (scores 64 to 68). Holiday ratings (0–100): Easter holidays 64, May half-term 67, Summer holidays 68, October half-term 65, Christmas holidays 66.
Near Hilo, Hawaii
Other destinations close by.
Places with a climate like Hilo, Hawaii
Destinations whose weather through the year is closest to Hilo, Hawaii's – good alternatives.