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Monthly climate in Chonan, Chiba, Japan

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Chonan features a humid subtropical climate (Cfa).Temperatures typically range between 6 °C (44 °F) and 28 °C (82 °F) through the year, but rarely can drop to -1 °C (30 °F) or can rise to as high as 35 °C (96 °F).The average annual precipitation amounts to about 1632 mm (64.3 inches) and receives 142 rainy days on the 1 mm (0.04 inches) threshold annually.Chonan enjoys an average of 2970 hours of sunshine throughout the year, and daylight varies from 9 hours 47 minutes to 14 hours 29 minutes per day.

Monthly average temperatures in Chonan, Chiba, Japan §

The warmest months in Chonan are July, August and September, with daily mean temperatures ranging from 24 to 28 °C (76 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 6 to 9 °C (44 - 49 °F) throughout the day. On average each year, Chonan experiences 85 days above 25 °C (77.0 °F) and 2 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Chonan, Chiba, 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 18°C
(64°F)		 19°C
(66°F)		 22°C
(71°F)		 25°C
(77°F)		 30°C
(86°F)		 31°C
(89°F)		 35°C
(96°F)		 35°C
(95°F)		 33°C
(92°F)		 29°C
(85°F)		 23°C
(74°F)		 22°C
(71°F)
Mean maximum 15°C
(60°F)		 16°C
(61°F)		 20°C
(68°F)		 23°C
(74°F)		 27°C
(82°F)		 28°C
(83°F)		 32°C
(90°F)		 34°C
(94°F)		 31°C
(89°F)		 28°C
(82°F)		 22°C
(71°F)		 18°C
(65°F)
Average high 9°C
(49°F)		 10°C
(51°F)		 14°C
(57°F)		 18°C
(64°F)		 22°C
(72°F)		 25°C
(77°F)		 28°C
(83°F)		 31°C
(87°F)		 27°C
(80°F)		 22°C
(71°F)		 17°C
(63°F)		 12°C
(54°F)
Daily mean 6°C
(44°F)		 7°C
(45°F)		 11°C
(52°F)		 15°C
(58°F)		 19°C
(67°F)		 22°C
(72°F)		 26°C
(79°F)		 28°C
(82°F)		 24°C
(76°F)		 19°C
(67°F)		 15°C
(59°F)		 9°C
(49°F)
Average low 3°C
(38°F)		 4°C
(40°F)		 8°C
(46°F)		 11°C
(53°F)		 17°C
(62°F)		 20°C
(68°F)		 24°C
(75°F)		 25°C
(78°F)		 22°C
(72°F)		 17°C
(63°F)		 12°C
(54°F)		 6°C
(44°F)
Mean minimum 0°C
(33°F)		 0°C
(33°F)		 2°C
(37°F)		 6°C
(43°F)		 12°C
(53°F)		 17°C
(63°F)		 21°C
(69°F)		 21°C
(71°F)		 18°C
(65°F)		 12°C
(54°F)		 7°C
(44°F)		 2°C
(35°F)
Minimum -1°C
(31°F)		 -1°C
(30°F)		 1°C
(34°F)		 4°C
(40°F)		 11°C
(52°F)		 16°C
(61°F)		 19°C
(66°F)		 20°C
(68°F)		 16°C
(61°F)		 10°C
(50°F)		 5°C
(40°F)		 -1°C
(31°F)

Compare climate in Chonan with other places

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

Monthly average precipitation in Chonan, Chiba, Japan §

Chonan usually has the most precipitation in July, September and October, with an average of 16 rainy days and 223 mm (8.8 inches) of precipitation per month.The driest months in Chonan are January, February and December. On average, 62 mm (2.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Chonan, Chiba, 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) 58 (2.3) 49 (1.9) 148 (5.8) 117 (4.6) 131 (5.1) 171 (6.7) 205 (8.1) 105 (4.1) 192 (7.6) 271 (10.7) 107 (4.2) 78 (3.1)
Average precipitation days (≥ 1 mm) 6 8 13 11 10 13 16 14 16 16 11 8

Monthly sunshine hours in Chonan, Chiba, Japan §

The sunniest months in Chonan are April, May and August, when the sun shines an average of 9 hours 25 minutes a day.Least sunny months in Chonan: January, October and December receive an average of 6 hours 39 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Chonan, Chiba, 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 186 228 255 276 288 268 263 302 244 211 223 221
Mean daily daylight hours 10h 2m 10h 53m 11h 58m 13h 5m 14h 1m 14h 29m 14h 15m 13h 26m 12h 22m 11h 15m 10h 17m 9h 47m

Solar UV radiation in Chonan, Chiba, Japan §

Chonan experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 11 - 11, which corresponds to the 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 Chonan UV Index data.

Average daily maximum UV levels by month for Chonan, Chiba, 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 8 9 11 11 11 11 9 7 5 4