Urayasu, Japan climate

Cfa Humid subtropical

Urayasu has a seasonal mild-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 2°C at night. Precipitation totals about 1371 mm a year and is strongly seasonal — October alone averages 206 mm while January barely receives 50 mm.

☀️ Summers

Warm

Highs near 30°C in August.

❄️ Winters

Chilly

Lows near 2°C in January.

🌧️ Rain

Wet

About 1371 mm of rain a year.

Wettest in October

⛅ Sky & trend

Often cloudy

Cloudy skies 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)

Urayasu climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	10	11	13	18	22	25	29	30	27	22	17	12
Avg temp (°C)	6	7	9	14	18	22	25	27	24	18	13	8
Avg low (°C)	2	3	6	10	15	19	23	24	21	16	10	5
Precipitation (mm)	50	51	103	112	123	150	129	108	196	206	91	53

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	10	11	13	18	22	25
Avg temp (°C)	6	7	9	14	18	22
Avg low (°C)	2	3	6	10	15	19
Precipitation (mm)	50	51	103	112	123	150

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	29	30	27	22	17	12
Avg temp (°C)	25	27	24	18	13	8
Avg low (°C)	23	24	21	16	10	5
Precipitation (mm)	129	108	196	206	91	53

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	46	52	60	64	70	82	75	64	71	67	56	45
Relative humidity (%)	75	74	75	77	79	82	83	81	82	82	80	77
Wind speed (m/s)	2.7	2.9	3.0	2.9	2.7	2.3	2.4	2.3	2.5	2.5	2.3	2.5

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	46	52	60	64	70	82
Relative humidity (%)	75	74	75	77	79	82
Wind speed (m/s)	2.7	2.9	3.0	2.9	2.7	2.3

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	75	64	71	67	56	45
Relative humidity (%)	83	81	82	82	80	77
Wind speed (m/s)	2.4	2.3	2.5	2.5	2.3	2.5

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Edogawa-rinkai, about 4 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 →