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Monthly climate in Kapolei, Hawaii, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Kapolei features a tropical savanna climate (As). Temperatures typically range between 22 °C (73 °F) and 26 °C (79 °F) through the year, but rarely can drop to 17 °C (63 °F) or can rise to as high as 28 °C (83 °F). The average annual precipitation amounts to about 390 mm (15.3 inches) and receives 56 rainy days on the 1 mm (0.04 inches) threshold annually. Kapolei enjoys an average of 3592 hours of sunshine throughout the year, and daylight varies from 10 hours 50 minutes to 13 hours 23 minutes per day.

Monthly average temperatures in Kapolei, Hawaii, United States §

The warmest months in Kapolei are July, August and September, with daily mean temperatures ranging from 26 to 26 °C (79 - 79 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 22 to 23 °C (73 - 74 °F) throughout the day. On average each year, Kapolei experiences 184 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 Kapolei, 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 26°C
(79°F)		 25°C
(78°F)		 25°C
(78°F)		 26°C
(79°F)		 27°C
(81°F)		 27°C
(81°F)		 28°C
(82°F)		 28°C
(83°F)		 28°C
(83°F)		 28°C
(83°F)		 28°C
(83°F)		 26°C
(80°F)
Mean maximum 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(78°F)		 26°C
(80°F)		 27°C
(80°F)		 27°C
(81°F)		 28°C
(82°F)		 28°C
(82°F)		 27°C
(82°F)		 27°C
(81°F)		 26°C
(78°F)
Average high 24°C
(76°F)		 23°C
(74°F)		 24°C
(75°F)		 24°C
(76°F)		 25°C
(78°F)		 26°C
(79°F)		 27°C
(80°F)		 27°C
(81°F)		 27°C
(81°F)		 27°C
(80°F)		 26°C
(79°F)		 25°C
(77°F)
Daily mean 23°C
(74°F)		 22°C
(73°F)		 23°C
(73°F)		 23°C
(75°F)		 24°C
(76°F)		 25°C
(78°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(78°F)		 25°C
(77°F)		 24°C
(75°F)
Average low 22°C
(73°F)		 22°C
(71°F)		 22°C
(72°F)		 23°C
(73°F)		 23°C
(74°F)		 24°C
(76°F)		 25°C
(77°F)		 25°C
(78°F)		 25°C
(78°F)		 25°C
(77°F)		 24°C
(76°F)		 23°C
(74°F)
Mean minimum 21°C
(70°F)		 19°C
(67°F)		 20°C
(69°F)		 21°C
(70°F)		 21°C
(71°F)		 23°C
(74°F)		 24°C
(75°F)		 25°C
(77°F)		 24°C
(76°F)		 23°C
(74°F)		 22°C
(72°F)		 21°C
(71°F)
Minimum 20°C
(68°F)		 17°C
(63°F)		 19°C
(66°F)		 20°C
(69°F)		 19°C
(67°F)		 23°C
(73°F)		 23°C
(74°F)		 24°C
(75°F)		 24°C
(75°F)		 23°C
(73°F)		 21°C
(70°F)		 19°C
(67°F)

Compare climate in Kapolei with other places

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

Monthly average precipitation in Kapolei, Hawaii, United States §

Kapolei usually has the most precipitation in February, March and December, with an average of 7 rainy days and 62 mm (2.4 inches) of precipitation per month. The driest months in Kapolei are January, July and August. On average, 12 mm (0.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Kapolei, 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) 13 (0.5) 58 (2.3) 64 (2.5) 28 (1.1) 23 (0.9) 33 (1.3) 11 (0.4) 13 (0.5) 18 (0.7) 43 (1.7) 22 (0.9) 63 (2.5)
Average precipitation days (≥ 1 mm) 3 8 7 5 4 2 2 2 3 7 6 7

Monthly sunshine hours in Kapolei, Hawaii, United States §

The sunniest months in Kapolei are June, July and August, when the sun shines an average of 11 hours 9 minutes a day. Least sunny months in Kapolei: January, February and December receive an average of 8 hours 3 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Kapolei, 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 222 253 289 310 337 338 350 338 319 301 274 256
Mean daily daylight hours 10h 59m 11h 26m 12h 2m 12h 38m 13h 9m 13h 23m 13h 15m 12h 48m 12h 13m 11h 37m 11h 5m 10h 50m

Solar UV radiation in Kapolei, Hawaii, United States §

Kapolei 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 Kapolei UV Index data.

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

Detailed Monthly Weather Insights for Kapolei, Hawaii, United States

Discover in-depth weather details for every month in Kapolei. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Kapolei's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.