Hilo, HI Climate & Monthly Averages
The climate of Hilo
Located in Hawaii, United States, Hilo experiences a tropical rainforest climate with steady heat, high humidity and frequent downpours in every month. Afternoon temperatures peak near 80°F (27°C) in August and dip to about 75°F (24°C) in February, with around 93.6 inches (2378 mm) of precipitation falling across the year.
Climate quick facts
- Hottest month: August - highs near 80°F (27°C)
- Coldest month: February - highs near 75°F (24°C)
- Record high: 86°F (30°C) · Record low: 58°F (14°C) (2015–2024)
- Wettest month: March (23 rainy days) · Sunniest: June (11.7 h sun/day)
- Climate type: tropical rainforest - steady heat, high humidity and frequent downpours in every month
Temperatures through the year
The warmest stretch of the year centers on August. Highs average 80°F (27°C) and overnight lows stay near 71°F (22°C). The coolest month is February, with typical highs of 75°F (24°C) and lows around 65°F (18°C). Based on 2015–2024 weather data, temperatures have reached as high as 86°F (30°C) and dropped as low as 58°F (14°C).
Rain, sun and snow
March is usually the wettest month. It brings about 9.9 inches (250 mm) of rain over 23 days, while June is the driest. June brings the most sunshine, averaging 11.7 hours of sun a day.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 76° | 65° | 15 | 5.7 in | 9.7 h/day | 79% |
| February | 75° | 65° | 20 | 8.5 in | 9.3 h/day | 80% |
| March | 75° | 66° | 23 | 9.9 in | 8.6 h/day | 82% |
| April | 76° | 67° | 24 | 9.3 in | 9.8 h/day | 82% |
| May | 77° | 68° | 26 | 8.0 in | 10.4 h/day | 82% |
| June | 78° | 69° | 23 | 5.1 in | 11.7 h/day | 82% |
| July | 80° | 70° | 27 | 6.6 in | 11.7 h/day | 82% |
| August | 80° | 71° | 26 | 9.1 in | 11.0 h/day | 83% |
| September | 80° | 71° | 24 | 5.5 in | 10.9 h/day | 81% |
| October | 80° | 70° | 22 | 8.5 in | 10.0 h/day | 81% |
| November | 78° | 68° | 22 | 9.4 in | 9.1 h/day | 82% |
| December | 76° | 66° | 22 | 8.0 in | 8.8 h/day | 82% |
Hilo month by month
Hilo weather in January
January brings highs around 76°F (24°C), lows near 65°F (18°C), about 15 wet days.
Hilo weather in February
February brings highs around 75°F (24°C), lows near 65°F (18°C), about 20 wet days - typically the coldest month of the year in Hilo.
Hilo weather in March
March brings highs around 75°F (24°C), lows near 66°F (19°C), about 23 wet days - typically the wettest month of the year in Hilo.
Hilo weather in April
April brings highs around 76°F (24°C), lows near 67°F (19°C), about 24 wet days.
Hilo weather in May
May brings highs around 77°F (25°C), lows near 68°F (20°C), about 26 wet days.
Hilo weather in June
June brings highs around 78°F (26°C), lows near 69°F (20°C), about 23 wet days - typically the driest month and the sunniest month of the year in Hilo.
Hilo weather in July
July brings highs around 80°F (26°C), lows near 70°F (21°C), about 27 wet days.
Hilo weather in August
August brings highs around 80°F (27°C), lows near 71°F (22°C), about 26 wet days - typically the hottest month of the year in Hilo.
Hilo weather in September
September brings highs around 80°F (27°C), lows near 71°F (21°C), about 24 wet days.
Hilo weather in October
October brings highs around 80°F (26°C), lows near 70°F (21°C), about 22 wet days.
Hilo weather in November
November brings highs around 78°F (25°C), lows near 68°F (20°C), about 22 wet days.
Hilo weather in December
December brings highs around 76°F (24°C), lows near 66°F (19°C), about 22 wet days.
Seasons in Hilo
March through May
March through May in Hilo is pleasantly warm, with daytime highs averaging 76°F (24°C) and nights around 67°F (19°C); expect showers on roughly 74 days across the season.
June through August
June through August in Hilo is mild and warm, with daytime highs averaging 79°F (26°C) and nights around 70°F (21°C); expect showers on roughly 76 days across the season.
September through November
September through November in Hilo brings comfortable warmth, with daytime highs averaging 79°F (26°C) and nights around 70°F (21°C); expect showers on roughly 68 days across the season.
December through February
December through February in Hilo is pleasantly warm, with daytime highs averaging 75°F (24°C) and nights around 65°F (18°C); expect showers on roughly 56 days across the season.
Climate questions, answered
What is the average temperature in Hilo?
Is Hilo hot in summer?
Is Hilo cold in winter?
How many rainy days does Hilo get in a year?
Best time to visit Hilo
The best time to visit Hilo is generally January to June, when these months combine the driest skies with the most comfortable heat. Daytime temperatures in that window typically sit near 76°F (24°C).
Pack for Hilo with a compact umbrella or rain shell - showers are a regular feature. Evenings can feel noticeably cooler than afternoons - August nights average 71°F (22°C).
Hilo temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.