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Yonezawa, Japan climate
Cfa Humid subtropical
Yonezawa 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 −4°C at night. Around 1438 mm of precipitation falls each year, peaking in July (178 mm) and easing off in April (67 mm).
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)Yonezawa climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 3 | 4 | 8 | 16 | 22 | 25 | 28 | 30 | 25 | 19 | 12 | 6 |
| Avg temp (°C) | −1 | −1 | 3 | 9 | 16 | 20 | 23 | 25 | 20 | 14 | 7 | 2 |
| Avg low (°C) | −4 | −5 | −2 | 4 | 10 | 15 | 19 | 20 | 16 | 9 | 3 | −2 |
| Precipitation (mm) | 160 | 102 | 85 | 67 | 71 | 114 | 178 | 151 | 128 | 118 | 105 | 158 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 3 | 4 | 8 | 16 | 22 | 25 |
| Avg temp (°C) | −1 | −1 | 3 | 9 | 16 | 20 |
| Avg low (°C) | −4 | −5 | −2 | 4 | 10 | 15 |
| Precipitation (mm) | 160 | 102 | 85 | 67 | 71 | 114 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 30 | 25 | 19 | 12 | 6 |
| Avg temp (°C) | 23 | 25 | 20 | 14 | 7 | 2 |
| Avg low (°C) | 19 | 20 | 16 | 9 | 3 | −2 |
| Precipitation (mm) | 178 | 151 | 128 | 118 | 105 | 158 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 62 | 63 | 65 | 66 | 69 | 77 | 78 | 69 | 74 | 68 | 63 | 63 |
| Relative humidity (%) | 96 | 94 | 87 | 81 | 80 | 82 | 85 | 83 | 85 | 87 | 90 | 93 |
| Wind speed (km/h) | 4.5 | 5.9 | 4.8 | 2.7 | 1.1 | 0.6 | 0.6 | 0.6 | 0.6 | 0.8 | 1.1 | 2.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 62 | 63 | 65 | 66 | 69 | 77 |
| Relative humidity (%) | 96 | 94 | 87 | 81 | 80 | 82 |
| Wind speed (km/h) | 4.5 | 5.9 | 4.8 | 2.7 | 1.1 | 0.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 69 | 74 | 68 | 63 | 63 |
| Relative humidity (%) | 85 | 83 | 85 | 87 | 90 | 93 |
| Wind speed (km/h) | 0.6 | 0.6 | 0.6 | 0.8 | 1.1 | 2.4 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Yonezawa, about 2 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.