nomadseason

Monthly climate in Seiyo, Ehime, Japan

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Seiyo features a humid subtropical climate (Cfa).Temperatures typically range between 4 °C (40 °F) and 27 °C (80 °F) through the year, but rarely can drop to -10 °C (15 °F) or can rise to as high as 35 °C (95 °F).The average annual precipitation amounts to about 2046 mm (80.6 inches) and receives 150 rainy days on the 1 mm (0.04 inches) threshold annually.Seiyo enjoys an average of 3181 hours of sunshine throughout the year, and daylight varies from 9 hours 58 minutes to 14 hours 18 minutes per day.

Monthly average temperatures in Seiyo, Ehime, Japan §

The warmest months in Seiyo are July, August and September, with daily mean temperatures ranging from 23 to 27 °C (74 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 6 °C (40 - 43 °F) throughout the day. On average each year, Seiyo experiences 97 days above 25 °C (77.0 °F) and 41 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Seiyo, Ehime, 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 16°C
(60°F)		 20°C
(68°F)		 22°C
(72°F)		 26°C
(79°F)		 30°C
(86°F)		 31°C
(87°F)		 34°C
(94°F)		 35°C
(95°F)		 33°C
(92°F)		 29°C
(85°F)		 24°C
(75°F)		 21°C
(70°F)
Mean maximum 14°C
(57°F)		 15°C
(60°F)		 21°C
(69°F)		 25°C
(77°F)		 28°C
(83°F)		 29°C
(85°F)		 33°C
(92°F)		 34°C
(94°F)		 32°C
(90°F)		 28°C
(83°F)		 22°C
(72°F)		 17°C
(62°F)
Average high 8°C
(47°F)		 9°C
(49°F)		 14°C
(58°F)		 19°C
(66°F)		 23°C
(73°F)		 26°C
(78°F)		 29°C
(84°F)		 31°C
(88°F)		 27°C
(81°F)		 22°C
(72°F)		 17°C
(62°F)		 11°C
(51°F)
Daily mean 4°C
(40°F)		 5°C
(41°F)		 9°C
(49°F)		 14°C
(57°F)		 18°C
(65°F)		 22°C
(71°F)		 25°C
(78°F)		 27°C
(80°F)		 23°C
(74°F)		 18°C
(64°F)		 11°C
(52°F)		 6°C
(43°F)
Average low 0°C
(33°F)		 1°C
(33°F)		 4°C
(40°F)		 8°C
(48°F)		 13°C
(56°F)		 18°C
(64°F)		 22°C
(72°F)		 23°C
(74°F)		 20°C
(67°F)		 13°C
(56°F)		 6°C
(43°F)		 2°C
(35°F)
Mean minimum -4°C
(24°F)		 -4°C
(24°F)		 -1°C
(30°F)		 1°C
(34°F)		 6°C
(43°F)		 13°C
(56°F)		 19°C
(67°F)		 20°C
(68°F)		 14°C
(57°F)		 6°C
(43°F)		 -1°C
(31°F)		 -2°C
(28°F)
Minimum -7°C
(20°F)		 -10°C
(15°F)		 -2°C
(29°F)		 -1°C
(31°F)		 3°C
(39°F)		 11°C
(52°F)		 17°C
(62°F)		 18°C
(64°F)		 12°C
(54°F)		 4°C
(40°F)		 -2°C
(29°F)		 -3°C
(28°F)

Compare climate in Seiyo with other places

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

Monthly average precipitation in Seiyo, Ehime, Japan §

Seiyo usually has the most precipitation in June, July and September, with an average of 17 rainy days and 291 mm (11.5 inches) of precipitation per month.The driest months in Seiyo are January, November and December. On average, 63 mm (2.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Seiyo, Ehime, 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) 60 (2.4) 97 (3.8) 140 (5.5) 140 (5.5) 174 (6.8) 236 (9.3) 409 (16.1) 219 (8.6) 229 (9.0) 213 (8.4) 62 (2.4) 69 (2.7)
Average precipitation days (≥ 1 mm) 9 11 13 10 12 15 20 17 16 11 8 8

Monthly sunshine hours in Seiyo, Ehime, Japan §

The sunniest months in Seiyo are April, May and August, when the sun shines an average of 9 hours 51 minutes a day.Least sunny months in Seiyo: January, February and December receive an average of 7 hours 12 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Seiyo, Ehime, 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 191 237 273 288 304 283 287 313 268 260 244 227
Mean daily daylight hours 10h 11m 10h 58m 11h 58m 13h 0m 13h 52m 14h 18m 14h 5m 13h 20m 12h 20m 11h 19m 10h 25m 9h 58m

Solar UV radiation in Seiyo, Ehime, Japan §

Seiyo experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 12 - 12, which corresponds to the Extreme category of sun exposure.January, February and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Seiyo UV Index data.

Average daily maximum UV levels by month for Seiyo, Ehime, 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) 4 6 9 10 12 11 12 12 11 8 6 4