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Monthly climate in Hilo, Hawaii, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Hilo features a oceanic climate (Cfb).Temperatures typically range between 21 °C (70 °F) and 24 °C (76 °F) through the year, but rarely can drop to 17 °C (62 °F) or can rise to as high as 29 °C (85 °F).The average annual precipitation amounts to about 2118 mm (83.4 inches) and receives 296 rainy days on the 1 mm (0.04 inches) threshold annually.Hilo enjoys an average of 3399 hours of sunshine throughout the year, and daylight varies from 10 hours 56 minutes to 13 hours 17 minutes per day.

Monthly average temperatures in Hilo, Hawaii, United States §

The warmest months in Hilo are August, September and October, with daily mean temperatures ranging from 24 to 24 °C (75 - 76 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 21 to 21 °C (70 - 71 °F) throughout the day. On average each year, Hilo experiences 97 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Hilo, Hawaii, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 25°C
(77°F)		 26°C
(79°F)		 26°C
(78°F)		 26°C
(80°F)		 26°C
(79°F)		 27°C
(80°F)		 29°C
(85°F)		 27°C
(82°F)		 28°C
(82°F)		 28°C
(82°F)		 27°C
(80°F)		 26°C
(78°F)
Mean maximum 24°C
(76°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 26°C
(78°F)		 25°C
(78°F)		 27°C
(80°F)		 27°C
(81°F)		 27°C
(81°F)		 27°C
(81°F)		 26°C
(80°F)		 25°C
(77°F)
Average high 23°C
(74°F)		 23°C
(73°F)		 23°C
(73°F)		 23°C
(74°F)		 24°C
(75°F)		 25°C
(77°F)		 25°C
(78°F)		 26°C
(78°F)		 26°C
(79°F)		 25°C
(78°F)		 25°C
(76°F)		 23°C
(74°F)
Daily mean 21°C
(71°F)		 21°C
(70°F)		 21°C
(70°F)		 22°C
(71°F)		 22°C
(73°F)		 23°C
(74°F)		 24°C
(75°F)		 24°C
(75°F)		 24°C
(76°F)		 24°C
(75°F)		 23°C
(74°F)		 22°C
(71°F)
Average low 20°C
(68°F)		 20°C
(68°F)		 20°C
(68°F)		 20°C
(69°F)		 21°C
(70°F)		 22°C
(71°F)		 22°C
(72°F)		 23°C
(73°F)		 23°C
(73°F)		 22°C
(72°F)		 22°C
(71°F)		 21°C
(69°F)
Mean minimum 19°C
(66°F)		 18°C
(64°F)		 18°C
(65°F)		 19°C
(67°F)		 20°C
(68°F)		 21°C
(70°F)		 21°C
(71°F)		 22°C
(71°F)		 22°C
(72°F)		 21°C
(71°F)		 20°C
(69°F)		 19°C
(67°F)
Minimum 18°C
(65°F)		 17°C
(62°F)		 17°C
(64°F)		 18°C
(65°F)		 19°C
(67°F)		 20°C
(69°F)		 21°C
(70°F)		 21°C
(70°F)		 21°C
(71°F)		 20°C
(69°F)		 20°C
(68°F)		 18°C
(65°F)

Compare climate in Hilo with other places

Compare temperature, precipitation, sunshine, UV index in Hilo, Hawaii, United States with other places around the world.

Monthly average precipitation in Hilo, Hawaii, United States §

Hilo usually has the most precipitation in February, March and December, with an average of 24 rainy days and 238 mm (9.4 inches) of precipitation per month.The driest months in Hilo are June, July and September. On average, 115 mm (4.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hilo, Hawaii, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 158 (6.2) 262 (10.3) 225 (8.8) 195 (7.7) 166 (6.5) 106 (4.2) 131 (5.1) 197 (7.8) 108 (4.3) 189 (7.4) 153 (6.0) 228 (9.0)
Average precipitation days (≥ 1 mm) 20 23 26 25 27 25 28 27 24 23 24 24

Monthly sunshine hours in Hilo, Hawaii, United States §

The sunniest months in Hilo are June, July and August, when the sun shines an average of 10 hours 47 minutes a day.Least sunny months in Hilo: January, February and March receive an average of 7 hours 44 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hilo, Hawaii, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 211 244 249 284 317 331 338 322 304 283 259 251
Mean daily daylight hours 11h 4m 11h 29m 12h 2m 12h 36m 13h 4m 13h 17m 13h 10m 12h 45m 12h 12m 11h 39m 11h 10m 10h 56m

Solar UV radiation in Hilo, Hawaii, United States §

Hilo experiences the highest level of ultraviolet (UV) radiation in April, July and August, when the maximum UV index can reach values of 13 - 14, which corresponds to the Extreme category of sun exposure.January, November and December are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 9. For more detailed information, check out our hourly Hilo UV Index data.

Average daily maximum UV levels by month for Hilo, Hawaii, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 8 11 12 13 13 13 14 14 13 12 9 8