Kushiro, Japan climate

Dfb Warm-summer humid continental

Kushiro has a seasonal cold-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is August with an average daily high near 22°C, while the coldest is January averaging around −10°C at night. Precipitation totals about 1080 mm a year and is strongly seasonal — September alone averages 153 mm while February barely receives 25 mm.

☀️ Summers

Mild

Highs near 22°C in August.

❄️ Winters

Very cold

Lows near −10°C in January.

🌧️ Rain

Wet

About 1080 mm of rain a year.

Wettest in September

⛅ 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)

Kushiro climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	0	0	3	8	13	16	20	22	20	15	9	3
Avg temp (°C)	−5	−4	0	4	9	12	16	18	17	11	5	−2
Avg low (°C)	−10	−9	−4	1	5	10	14	16	13	6	0	−7
Precipitation (mm)	40	25	56	79	116	114	120	142	153	113	65	57

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	0	0	3	8	13	16
Avg temp (°C)	−5	−4	0	4	9	12
Avg low (°C)	−10	−9	−4	1	5	10
Precipitation (mm)	40	25	56	79	116	114

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	20	22	20	15	9	3
Avg temp (°C)	16	18	17	11	5	−2
Avg low (°C)	14	16	13	6	0	−7
Precipitation (mm)	120	142	153	113	65	57

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	56	59	62	71	75	81	84	80	72	58	56	55
Relative humidity (%)	87	86	82	82	85	88	89	88	86	83	82	84
Wind speed (km/h)	15.4	15.8	15.9	13.6	12.0	9.8	9.1	9.9	11.6	13.6	15.2	15.8

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	56	59	62	71	75	81
Relative humidity (%)	87	86	82	82	85	88
Wind speed (km/h)	15.4	15.8	15.9	13.6	12.0	9.8

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	84	80	72	58	56	55
Relative humidity (%)	89	88	86	83	82	84
Wind speed (km/h)	9.1	9.9	11.6	13.6	15.2	15.8

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Kushiro, about 1 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 →