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Monthly climate in Wailuku, Hawaii, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Wailuku features a tropical savanna climate (As).Temperatures typically range between 23 °C (73 °F) and 27 °C (80 °F) through the year, but rarely can drop to 16 °C (61 °F) or can rise to as high as 32 °C (89 °F).The average annual precipitation amounts to about 430 mm (16.9 inches) and receives 80 rainy days on the 1 mm (0.04 inches) threshold annually.Wailuku enjoys an average of 3591 hours of sunshine throughout the year, and daylight varies from 10 hours 52 minutes to 13 hours 22 minutes per day.

Monthly average temperatures in Wailuku, Hawaii, United States §

The warmest months in Wailuku are July, August and September, with daily mean temperatures ranging from 26 to 27 °C (80 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 23 to 23 °C (73 - 74 °F) throughout the day. On average each year, Wailuku experiences 294 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 Wailuku, 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 28°C
(83°F)		 28°C
(83°F)		 29°C
(84°F)		 29°C
(84°F)		 31°C
(88°F)		 31°C
(88°F)		 31°C
(88°F)		 31°C
(89°F)		 32°C
(89°F)		 31°C
(88°F)		 31°C
(87°F)		 29°C
(85°F)
Mean maximum 28°C
(82°F)		 28°C
(82°F)		 28°C
(82°F)		 28°C
(83°F)		 29°C
(85°F)		 30°C
(86°F)		 30°C
(87°F)		 30°C
(87°F)		 31°C
(88°F)		 30°C
(87°F)		 30°C
(86°F)		 28°C
(83°F)
Average high 26°C
(79°F)		 25°C
(78°F)		 26°C
(79°F)		 27°C
(80°F)		 28°C
(82°F)		 29°C
(84°F)		 29°C
(85°F)		 29°C
(85°F)		 30°C
(85°F)		 29°C
(84°F)		 28°C
(82°F)		 26°C
(80°F)
Daily mean 23°C
(74°F)		 23°C
(73°F)		 23°C
(74°F)		 24°C
(75°F)		 25°C
(77°F)		 26°C
(79°F)		 26°C
(80°F)		 27°C
(80°F)		 27°C
(80°F)		 26°C
(79°F)		 25°C
(77°F)		 24°C
(75°F)
Average low 21°C
(70°F)		 20°C
(69°F)		 21°C
(70°F)		 22°C
(72°F)		 23°C
(73°F)		 24°C
(75°F)		 24°C
(76°F)		 24°C
(76°F)		 24°C
(76°F)		 24°C
(75°F)		 23°C
(73°F)		 22°C
(71°F)
Mean minimum 20°C
(67°F)		 18°C
(64°F)		 19°C
(67°F)		 20°C
(69°F)		 20°C
(69°F)		 23°C
(73°F)		 23°C
(74°F)		 23°C
(74°F)		 23°C
(74°F)		 22°C
(72°F)		 21°C
(70°F)		 20°C
(68°F)
Minimum 19°C
(66°F)		 16°C
(61°F)		 18°C
(64°F)		 19°C
(66°F)		 19°C
(66°F)		 22°C
(72°F)		 22°C
(73°F)		 22°C
(72°F)		 23°C
(73°F)		 21°C
(70°F)		 19°C
(67°F)		 18°C
(65°F)

Compare climate in Wailuku with other places

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

Monthly average precipitation in Wailuku, Hawaii, United States §

Wailuku usually has the most precipitation in February, March and April, with an average of 9 rainy days and 59 mm (2.3 inches) of precipitation per month.The driest months in Wailuku are June, July and September. On average, 17 mm (0.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Wailuku, 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) 32 (1.3) 75 (2.9) 52 (2.0) 49 (1.9) 36 (1.4) 11 (0.4) 23 (0.9) 25 (1.0) 17 (0.7) 40 (1.6) 25 (1.0) 45 (1.8)
Average precipitation days (≥ 1 mm) 5 10 10 9 6 2 4 5 4 7 7 11

Monthly sunshine hours in Wailuku, Hawaii, United States §

The sunniest months in Wailuku are June, July and August, when the sun shines an average of 11 hours 9 minutes a day.Least sunny months in Wailuku: January, February and December receive an average of 8 hours 8 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Wailuku, 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 221 254 289 310 334 342 348 335 316 300 271 263
Mean daily daylight hours 11h 0m 11h 27m 12h 2m 12h 38m 13h 7m 13h 22m 13h 14m 12h 47m 12h 13m 11h 37m 11h 7m 10h 52m

Solar UV radiation in Wailuku, Hawaii, United States §

Wailuku experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 13 - 13, which corresponds to the Extreme category of sun exposure.January, November and December are in the High / Very High exposure category. In these months, the maximum values of the UV index do not exceed 8. For more detailed information, check out our hourly Wailuku UV Index data.

Average daily maximum UV levels by month for Wailuku, 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) 7 10 11 12 12 13 13 13 12 11 8 8