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Sasayama, Japan climate
Cfa Humid subtropical
Sasayama has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 91°F, while the coldest is January averaging around 31°F at night. Around 64 inches of precipitation falls each year, peaking in July (8.7 inches) and easing off in January (2.5 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)Sasayama climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 46 | 48 | 55 | 66 | 75 | 81 | 87 | 91 | 82 | 72 | 61 | 51 |
| Avg temp (°F) | 38 | 39 | 45 | 55 | 64 | 71 | 78 | 80 | 73 | 62 | 51 | 42 |
| Avg low (°F) | 31 | 31 | 36 | 44 | 55 | 64 | 72 | 73 | 66 | 54 | 43 | 34 |
| Precipitation (in) | 2.5 | 2.9 | 4.6 | 5.0 | 6.0 | 7.3 | 8.7 | 6.7 | 8.6 | 5.6 | 3.2 | 2.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 46 | 48 | 55 | 66 | 75 | 81 |
| Avg temp (°F) | 38 | 39 | 45 | 55 | 64 | 71 |
| Avg low (°F) | 31 | 31 | 36 | 44 | 55 | 64 |
| Precipitation (in) | 2.5 | 2.9 | 4.6 | 5.0 | 6.0 | 7.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 87 | 91 | 82 | 72 | 61 | 51 |
| Avg temp (°F) | 78 | 80 | 73 | 62 | 51 | 42 |
| Avg low (°F) | 72 | 73 | 66 | 54 | 43 | 34 |
| Precipitation (in) | 8.7 | 6.7 | 8.6 | 5.6 | 3.2 | 2.7 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 84 | 81 | 75 | 69 | 71 | 81 | 77 | 66 | 74 | 70 | 74 | 80 |
| Relative humidity (%) | 87 | 84 | 81 | 80 | 81 | 84 | 86 | 84 | 85 | 84 | 85 | 87 |
| Wind speed (mph) | 4.5 | 5.0 | 5.3 | 4.8 | 4.2 | 3.7 | 3.8 | 3.7 | 4.1 | 4.1 | 3.8 | 4.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 84 | 81 | 75 | 69 | 71 | 81 |
| Relative humidity (%) | 87 | 84 | 81 | 80 | 81 | 84 |
| Wind speed (mph) | 4.5 | 5.0 | 5.3 | 4.8 | 4.2 | 3.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 66 | 74 | 70 | 74 | 80 |
| Relative humidity (%) | 86 | 84 | 85 | 84 | 85 | 87 |
| Wind speed (mph) | 3.8 | 3.7 | 4.1 | 4.1 | 3.8 | 4.1 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Kaibara, about 16 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.