nomadseason

Monthly climate in Iwai, Ibaraki, Japan

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Iwai features a humid subtropical climate (Cfa).Temperatures typically range between 4 °C (40 °F) and 28 °C (82 °F) through the year, but rarely can drop to -8 °C (18 °F) or can rise to as high as 37 °C (99 °F).The average annual precipitation amounts to about 1447 mm (57.0 inches) and receives 139 rainy days on the 1 mm (0.04 inches) threshold annually.Iwai enjoys an average of 2916 hours of sunshine throughout the year, and daylight varies from 9 hours 45 minutes to 14 hours 32 minutes per day.

Monthly average temperatures in Iwai, Ibaraki, Japan §

The warmest months in Iwai are July, August and September, with daily mean temperatures ranging from 24 to 28 °C (75 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 7 °C (40 - 44 °F) throughout the day. On average each year, Iwai experiences 99 days above 25 °C (77.0 °F) and 36 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Iwai, Ibaraki, 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 17°C
(63°F)		 21°C
(70°F)		 24°C
(75°F)		 28°C
(83°F)		 33°C
(91°F)		 33°C
(92°F)		 37°C
(99°F)		 37°C
(99°F)		 35°C
(95°F)		 32°C
(90°F)		 24°C
(75°F)		 21°C
(70°F)
Mean maximum 15°C
(60°F)		 17°C
(64°F)		 22°C
(72°F)		 26°C
(79°F)		 30°C
(86°F)		 30°C
(86°F)		 34°C
(94°F)		 36°C
(97°F)		 33°C
(92°F)		 29°C
(85°F)		 22°C
(72°F)		 18°C
(65°F)
Average high 9°C
(49°F)		 11°C
(51°F)		 15°C
(59°F)		 19°C
(66°F)		 24°C
(75°F)		 26°C
(79°F)		 29°C
(85°F)		 32°C
(89°F)		 27°C
(81°F)		 22°C
(71°F)		 17°C
(63°F)		 11°C
(53°F)
Daily mean 4°C
(40°F)		 6°C
(42°F)		 10°C
(50°F)		 14°C
(58°F)		 19°C
(67°F)		 22°C
(72°F)		 26°C
(79°F)		 28°C
(82°F)		 24°C
(75°F)		 18°C
(65°F)		 13°C
(55°F)		 7°C
(44°F)
Average low -0°C
(32°F)		 1°C
(34°F)		 5°C
(41°F)		 10°C
(50°F)		 15°C
(60°F)		 19°C
(66°F)		 23°C
(74°F)		 25°C
(77°F)		 21°C
(69°F)		 15°C
(59°F)		 9°C
(48°F)		 2°C
(37°F)
Mean minimum -5°C
(23°F)		 -4°C
(26°F)		 -2°C
(29°F)		 3°C
(38°F)		 8°C
(46°F)		 16°C
(60°F)		 19°C
(67°F)		 20°C
(68°F)		 15°C
(60°F)		 9°C
(48°F)		 2°C
(36°F)		 -3°C
(28°F)
Minimum -8°C
(18°F)		 -5°C
(23°F)		 -3°C
(26°F)		 1°C
(33°F)		 6°C
(42°F)		 13°C
(56°F)		 17°C
(63°F)		 17°C
(62°F)		 13°C
(55°F)		 6°C
(44°F)		 -1°C
(31°F)		 -4°C
(26°F)

Compare climate in Iwai with other places

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

Monthly average precipitation in Iwai, Ibaraki, Japan §

Iwai usually has the most precipitation in July, September and October, with an average of 16 rainy days and 211 mm (8.3 inches) of precipitation per month.The driest months in Iwai are January, February and December. On average, 45 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Iwai, Ibaraki, 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) 42 (1.6) 39 (1.5) 123 (4.9) 109 (4.3) 121 (4.8) 142 (5.6) 225 (8.9) 111 (4.4) 171 (6.7) 238 (9.4) 72 (2.8) 54 (2.1)
Average precipitation days (≥ 1 mm) 5 7 11 11 12 15 19 14 17 14 8 6

Monthly sunshine hours in Iwai, Ibaraki, Japan §

The sunniest months in Iwai are April, May and August, when the sun shines an average of 9 hours 4 minutes a day.Least sunny months in Iwai: January, October and December receive an average of 6 hours 44 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Iwai, Ibaraki, 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 191 237 259 273 281 259 233 279 233 206 231 229
Mean daily daylight hours 10h 0m 10h 51m 11h 57m 13h 6m 14h 3m 14h 32m 14h 18m 13h 27m 12h 22m 11h 14m 10h 15m 9h 45m

Solar UV radiation in Iwai, Ibaraki, Japan §

Iwai experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure.January, February and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Iwai UV Index data.

Average daily maximum UV levels by month for Iwai, Ibaraki, 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) 3 5 7 9 10 11 11 10 9 7 5 3