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Shiojiri, Japan climate
Cfa Humid subtropical
Shiojiri has a strongly seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 31°C, while the coldest is January averaging around −7°C at night. Precipitation totals about 1102 mm a year and is strongly seasonal — October alone averages 151 mm while January barely receives 35 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)Shiojiri climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 4 | 6 | 11 | 17 | 23 | 26 | 29 | 31 | 26 | 19 | 13 | 7 |
| Avg temp (°C) | −1 | 0 | 4 | 10 | 16 | 20 | 23 | 24 | 20 | 13 | 7 | 2 |
| Avg low (°C) | −7 | −6 | −3 | 3 | 9 | 14 | 19 | 20 | 15 | 8 | 1 | −4 |
| Precipitation (mm) | 35 | 41 | 80 | 91 | 103 | 114 | 147 | 98 | 143 | 151 | 60 | 40 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 4 | 6 | 11 | 17 | 23 | 26 |
| Avg temp (°C) | −1 | 0 | 4 | 10 | 16 | 20 |
| Avg low (°C) | −7 | −6 | −3 | 3 | 9 | 14 |
| Precipitation (mm) | 35 | 41 | 80 | 91 | 103 | 114 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 31 | 26 | 19 | 13 | 7 |
| Avg temp (°C) | 23 | 24 | 20 | 13 | 7 | 2 |
| Avg low (°C) | 19 | 20 | 15 | 8 | 1 | −4 |
| Precipitation (mm) | 147 | 98 | 143 | 151 | 60 | 40 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 75 | 73 | 69 | 71 | 80 | 79 | 70 | 76 | 71 | 72 | 77 |
| Relative humidity (%) | 88 | 85 | 80 | 76 | 75 | 80 | 83 | 82 | 84 | 85 | 85 | 86 |
| Wind speed (km/h) | 9.0 | 9.3 | 9.2 | 8.5 | 7.1 | 5.8 | 5.9 | 5.2 | 5.5 | 5.9 | 6.9 | 8.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 75 | 73 | 69 | 71 | 80 |
| Relative humidity (%) | 88 | 85 | 80 | 76 | 75 | 80 |
| Wind speed (km/h) | 9.0 | 9.3 | 9.2 | 8.5 | 7.1 | 5.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 79 | 70 | 76 | 71 | 72 | 77 |
| Relative humidity (%) | 83 | 82 | 84 | 85 | 85 | 86 |
| Wind speed (km/h) | 5.9 | 5.2 | 5.5 | 5.9 | 6.9 | 8.5 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Matsumoto-imai, about 8 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.