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Monthly climate in Onna, Okinawa, Japan

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Onna features a humid subtropical climate (Cfa).Temperatures typically range between 18 °C (65 °F) and 28 °C (83 °F) through the year, but rarely can drop to 12 °C (53 °F) or can rise to as high as 30 °C (87 °F).The average annual precipitation amounts to about 2014 mm (79.3 inches) and receives 164 rainy days on the 1 mm (0.04 inches) threshold annually.Onna enjoys an average of 3088 hours of sunshine throughout the year, and daylight varies from 10 hours 29 minutes to 13 hours 45 minutes per day.

Monthly average temperatures in Onna, Okinawa, Japan §

The warmest months in Onna are July, August and September, with daily mean temperatures ranging from 28 to 28 °C (82 - 83 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 18 to 20 °C (65 - 68 °F) throughout the day. On average each year, Onna experiences 136 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 Onna, Okinawa, Japan.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 24°C
(75°F)		 24°C
(75°F)		 24°C
(76°F)		 26°C
(79°F)		 28°C
(82°F)		 29°C
(84°F)		 30°C
(87°F)		 30°C
(87°F)		 30°C
(86°F)		 29°C
(84°F)		 26°C
(80°F)		 25°C
(78°F)
Mean maximum 23°C
(74°F)		 22°C
(72°F)		 23°C
(74°F)		 24°C
(76°F)		 26°C
(80°F)		 28°C
(83°F)		 29°C
(85°F)		 29°C
(85°F)		 29°C
(85°F)		 28°C
(83°F)		 26°C
(78°F)		 24°C
(75°F)
Average high 19°C
(67°F)		 19°C
(67°F)		 21°C
(70°F)		 22°C
(72°F)		 25°C
(76°F)		 27°C
(81°F)		 28°C
(83°F)		 29°C
(84°F)		 28°C
(83°F)		 26°C
(80°F)		 24°C
(75°F)		 21°C
(70°F)
Daily mean 18°C
(65°F)		 18°C
(65°F)		 20°C
(68°F)		 21°C
(70°F)		 24°C
(75°F)		 26°C
(80°F)		 28°C
(83°F)		 28°C
(83°F)		 28°C
(82°F)		 26°C
(78°F)		 23°C
(74°F)		 20°C
(68°F)
Average low 17°C
(63°F)		 17°C
(63°F)		 19°C
(66°F)		 20°C
(69°F)		 23°C
(74°F)		 26°C
(79°F)		 27°C
(82°F)		 28°C
(82°F)		 27°C
(81°F)		 25°C
(77°F)		 22°C
(72°F)		 19°C
(67°F)
Mean minimum 14°C
(57°F)		 13°C
(56°F)		 15°C
(60°F)		 17°C
(62°F)		 20°C
(68°F)		 23°C
(74°F)		 26°C
(79°F)		 26°C
(79°F)		 25°C
(78°F)		 22°C
(72°F)		 19°C
(67°F)		 15°C
(60°F)
Minimum 12°C
(53°F)		 12°C
(53°F)		 14°C
(57°F)		 15°C
(60°F)		 19°C
(66°F)		 21°C
(69°F)		 26°C
(78°F)		 26°C
(78°F)		 24°C
(75°F)		 21°C
(70°F)		 19°C
(66°F)		 14°C
(57°F)

Compare climate in Onna with other places

Compare temperature, precipitation, sunshine, UV index in Onna, Okinawa, Japan with other places around the world.

Monthly average precipitation in Onna, Okinawa, Japan §

Onna usually has the most precipitation in May, June and September, with an average of 16 rainy days and 259 mm (10.2 inches) of precipitation per month.The driest months in Onna are January, February and November. On average, 101 mm (4.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Onna, Okinawa, Japan.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) 99 (3.9) 98 (3.9) 109 (4.3) 146 (5.7) 213 (8.4) 328 (12.9) 180 (7.1) 187 (7.4) 237 (9.3) 149 (5.8) 106 (4.2) 162 (6.4)
Average precipitation days (≥ 1 mm) 11 13 12 12 12 20 12 16 18 12 11 15

Monthly sunshine hours in Onna, Okinawa, Japan §

The sunniest months in Onna are May, July and August, when the sun shines an average of 10 hours 7 minutes a day.Least sunny months in Onna: January, February and December receive an average of 6 hours 1 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Onna, Okinawa, Japan.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 153 202 268 268 305 263 317 318 295 274 227 192
Mean daily daylight hours 10h 40m 11h 14m 12h 0m 12h 47m 13h 26m 13h 45m 13h 35m 13h 1m 12h 17m 11h 30m 10h 50m 10h 29m

Solar UV radiation in Onna, Okinawa, Japan §

Onna experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 13 - 13, which corresponds to the Extreme category of sun exposure.January, October and December are in the High / 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 Onna UV Index data.

Average daily maximum UV levels by month for Onna, Okinawa, Japan.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 9 11 12 13 13 13 13 12 9 9 6