Daisen, Japan climate

Cfa Humid subtropical

Daisen has a strongly seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 30°C, while the coldest is January averaging around −5°C at night. Around 2163 mm of precipitation falls each year, peaking in December (268 mm) and easing off in April (107 mm).

☀️ Summers

Warm

Highs near 30°C in August.

❄️ Winters

Cold

Lows near −5°C in January.

🌧️ Rain

Very wet

About 2163 mm of rain a year.

Wettest in December

⛅ Sky & trend

Often grey

Overcast skies dominate much of the year.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Daisen climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	2	3	7	15	21	25	28	30	26	19	12	5
Avg temp (°C)	−1	−1	2	8	15	19	23	24	20	13	7	1
Avg low (°C)	−5	−5	−3	2	9	14	19	20	15	8	2	−2
Precipitation (mm)	256	168	131	107	114	128	196	194	167	192	242	268

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	2	3	7	15	21	25
Avg temp (°C)	−1	−1	2	8	15	19
Avg low (°C)	−5	−5	−3	2	9	14
Precipitation (mm)	256	168	131	107	114	128

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	28	30	26	19	12	5
Avg temp (°C)	23	24	20	13	7	1
Avg low (°C)	19	20	15	8	2	−2
Precipitation (mm)	196	194	167	192	242	268

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	83	80	78	73	71	74	79	71	74	72	78	84
Relative humidity (%)	83	81	77	78	80	82	85	82	79	78	80	83
Wind speed (m/s)	4.3	4.4	3.7	2.6	1.9	1.6	1.6	1.7	2.1	2.5	3.0	3.8

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	83	80	78	73	71	74
Relative humidity (%)	83	81	77	78	80	82
Wind speed (m/s)	4.3	4.4	3.7	2.6	1.9	1.6

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	79	71	74	72	78	84
Relative humidity (%)	85	82	79	78	80	83
Wind speed (m/s)	1.6	1.7	2.1	2.5	3.0	3.8

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Higashiyuri, about 23 km from the city centre.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →