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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 86°F, while the coldest is January averaging around 24°F at night. Around 57 inches of precipitation falls each year, peaking in July (7.0 inches) and easing off in April (2.7 inches).
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 (°F) | 37 | 38 | 46 | 60 | 72 | 78 | 83 | 86 | 78 | 66 | 54 | 42 |
| Avg temp (°F) | 31 | 31 | 37 | 49 | 60 | 68 | 74 | 76 | 68 | 56 | 45 | 35 |
| Avg low (°F) | 24 | 24 | 29 | 38 | 49 | 59 | 67 | 68 | 61 | 48 | 37 | 29 |
| Precipitation (in) | 6.3 | 4.0 | 3.4 | 2.7 | 2.8 | 4.5 | 7.0 | 6.0 | 5.0 | 4.6 | 4.1 | 6.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 37 | 38 | 46 | 60 | 72 | 78 |
| Avg temp (°F) | 31 | 31 | 37 | 49 | 60 | 68 |
| Avg low (°F) | 24 | 24 | 29 | 38 | 49 | 59 |
| Precipitation (in) | 6.3 | 4.0 | 3.4 | 2.7 | 2.8 | 4.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 83 | 86 | 78 | 66 | 54 | 42 |
| Avg temp (°F) | 74 | 76 | 68 | 56 | 45 | 35 |
| Avg low (°F) | 67 | 68 | 61 | 48 | 37 | 29 |
| Precipitation (in) | 7.0 | 6.0 | 5.0 | 4.6 | 4.1 | 6.2 |
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 (mph) | 2.8 | 3.7 | 3.0 | 1.7 | 0.7 | 0.4 | 0.4 | 0.4 | 0.4 | 0.5 | 0.7 | 1.5 |
| 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 (mph) | 2.8 | 3.7 | 3.0 | 1.7 | 0.7 | 0.4 |
| 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 (mph) | 0.4 | 0.4 | 0.4 | 0.5 | 0.7 | 1.5 |
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.