Ōshū, Japan climate
Cfa Humid subtropical
Ōshū has a strongly seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 29°C, while the coldest is January averaging around −4°C at night. Around 1363 mm of precipitation falls each year, peaking in July (197 mm) and easing off in February (56 mm).
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Summers
Warm
Highs near 29°C in August.
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Winters
Cold
Lows near −4°C in January.
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Rain
Wet
About 1363 mm of rain a year.
Wettest in July
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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 figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Ōshū climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 2 | 4 | 8 | 15 | 21 | 24 | 27 | 29 | 25 | 19 | 12 | 5 |
| Avg temp (°C) | −1 | 0 | 3 | 9 | 15 | 19 | 23 | 24 | 20 | 14 | 7 | 2 |
| Avg low (°C) | −4 | −4 | −1 | 4 | 10 | 15 | 19 | 21 | 16 | 9 | 3 | −2 |
| Precipitation (mm) | 73 | 56 | 88 | 86 | 112 | 128 | 197 | 165 | 156 | 118 | 92 | 92 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 2 | 4 | 8 | 15 | 21 | 24 |
| Avg temp (°C) | −1 | 0 | 3 | 9 | 15 | 19 |
| Avg low (°C) | −4 | −4 | −1 | 4 | 10 | 15 |
| Precipitation (mm) | 73 | 56 | 88 | 86 | 112 | 128 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 29 | 25 | 19 | 12 | 5 |
| Avg temp (°C) | 23 | 24 | 20 | 14 | 7 | 2 |
| Avg low (°C) | 19 | 21 | 16 | 9 | 3 | −2 |
| Precipitation (mm) | 197 | 165 | 156 | 118 | 92 | 92 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 67 | 67 | 70 | 69 | 71 | 76 | 80 | 73 | 74 | 68 | 67 | 70 |
| Relative humidity (%) | 95 | 95 | 88 | 82 | 81 | 83 | 86 | 86 | 87 | 86 | 89 | 92 |
| Wind speed (mph) | 1.7 | 2.4 | 2.0 | 0.9 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 67 | 67 | 70 | 69 | 71 | 76 |
| Relative humidity (%) | 95 | 95 | 88 | 82 | 81 | 83 |
| Wind speed (mph) | 1.7 | 2.4 | 2.0 | 0.9 | 0.2 | 0.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 80 | 73 | 74 | 68 | 67 | 70 |
| Relative humidity (%) | 86 | 86 | 87 | 86 | 89 | 92 |
| Wind speed (mph) | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.6 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Kitakami, about 17 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.