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Monthly climate in Ko Olina, Hawaii, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Ko Olina features a tropical savanna climate (As).Temperatures typically range between 23 °C (73 °F) and 26 °C (80 °F) through the year, but rarely can drop to 18 °C (65 °F) or can rise to as high as 28 °C (83 °F).The average annual precipitation amounts to about 358 mm (14.1 inches) and receives 40 rainy days on the 1 mm (0.04 inches) threshold annually.Ko Olina enjoys an average of 3576 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 Ko Olina, Hawaii, United States §

The warmest months in Ko Olina are July, August and September, with daily mean temperatures ranging from 26 to 26 °C (79 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 23 to 24 °C (73 - 75 °F) throughout the day. On average each year, Ko Olina experiences 183 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 Ko Olina, 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
(78°F)		 25°C
(78°F)		 25°C
(78°F)		 25°C
(78°F)		 27°C
(80°F)		 27°C
(81°F)		 28°C
(82°F)		 28°C
(83°F)		 28°C
(83°F)		 28°C
(83°F)		 27°C
(81°F)		 26°C
(79°F)
Mean maximum 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(78°F)		 26°C
(79°F)		 27°C
(80°F)		 27°C
(81°F)		 28°C
(82°F)		 28°C
(82°F)		 27°C
(81°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
(77°F)		 26°C
(79°F)		 27°C
(80°F)		 27°C
(81°F)		 27°C
(81°F)		 26°C
(80°F)		 26°C
(79°F)		 25°C
(77°F)
Daily mean 24°C
(75°F)		 23°C
(73°F)		 23°C
(74°F)		 24°C
(75°F)		 24°C
(76°F)		 25°C
(78°F)		 26°C
(79°F)		 26°C
(80°F)		 26°C
(80°F)		 26°C
(79°F)		 25°C
(78°F)		 24°C
(76°F)
Average low 23°C
(74°F)		 22°C
(72°F)		 22°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
(78°F)		 25°C
(78°F)		 25°C
(77°F)		 24°C
(75°F)
Mean minimum 21°C
(71°F)		 20°C
(68°F)		 21°C
(70°F)		 22°C
(71°F)		 22°C
(72°F)		 24°C
(75°F)		 24°C
(76°F)		 25°C
(77°F)		 25°C
(77°F)		 24°C
(75°F)		 23°C
(73°F)		 22°C
(71°F)
Minimum 20°C
(69°F)		 18°C
(65°F)		 19°C
(67°F)		 21°C
(70°F)		 20°C
(68°F)		 23°C
(73°F)		 24°C
(75°F)		 24°C
(76°F)		 24°C
(76°F)		 23°C
(73°F)		 21°C
(71°F)		 19°C
(67°F)

Compare climate in Ko Olina with other places

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

Monthly average precipitation in Ko Olina, Hawaii, United States §

Ko Olina usually has the most precipitation in February, March and December, with an average of 6 rainy days and 63 mm (2.5 inches) of precipitation per month.The driest months in Ko Olina are January, July and August. On average, 9 mm (0.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ko Olina, 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) 10 (0.4) 58 (2.3) 59 (2.3) 21 (0.8) 16 (0.6) 33 (1.3) 6 (0.3) 9 (0.4) 13 (0.5) 42 (1.7) 18 (0.7) 70 (2.8)
Average precipitation days (≥ 1 mm) 2 7 6 3 1 1 1 2 2 5 5 5

Monthly sunshine hours in Ko Olina, Hawaii, United States §

The sunniest months in Ko Olina are May, July and August, when the sun shines an average of 11 hours 1 minutes a day.Least sunny months in Ko Olina: January, February and December receive an average of 7 hours 59 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ko Olina, 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 218 255 286 308 337 337 349 338 317 300 273 253
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 Ko Olina, Hawaii, United States §

Ko Olina experiences the highest level of ultraviolet (UV) radiation in April, July and September, when the maximum UV index can reach values of 12 - 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 Ko Olina UV Index data.

Average daily maximum UV levels by month for Ko Olina, 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 12 13 12 12 11 8 7