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Sayama, Japan climate
Cfa Humid subtropical
Sayama has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 93°F, while the coldest is January averaging around 35°F at night. Around 49 inches of precipitation falls each year, peaking in June (6.5 inches) and easing off in January (1.9 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)Sayama climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 49 | 51 | 58 | 68 | 77 | 83 | 90 | 93 | 85 | 74 | 64 | 54 |
| Avg temp (°F) | 42 | 43 | 49 | 58 | 67 | 74 | 81 | 83 | 76 | 65 | 55 | 46 |
| Avg low (°F) | 35 | 35 | 40 | 49 | 58 | 66 | 74 | 76 | 69 | 58 | 47 | 39 |
| Precipitation (in) | 1.9 | 2.3 | 3.9 | 3.6 | 5.0 | 6.5 | 6.1 | 3.4 | 5.5 | 5.5 | 2.9 | 2.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 49 | 51 | 58 | 68 | 77 | 83 |
| Avg temp (°F) | 42 | 43 | 49 | 58 | 67 | 74 |
| Avg low (°F) | 35 | 35 | 40 | 49 | 58 | 66 |
| Precipitation (in) | 1.9 | 2.3 | 3.9 | 3.6 | 5.0 | 6.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 90 | 93 | 85 | 74 | 64 | 54 |
| Avg temp (°F) | 81 | 83 | 76 | 65 | 55 | 46 |
| Avg low (°F) | 74 | 76 | 69 | 58 | 47 | 39 |
| Precipitation (in) | 6.1 | 3.4 | 5.5 | 5.5 | 2.9 | 2.0 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 72 | 69 | 67 | 65 | 69 | 80 | 74 | 63 | 70 | 66 | 66 | 69 |
| Relative humidity (%) | 84 | 81 | 80 | 78 | 80 | 83 | 85 | 84 | 84 | 84 | 84 | 84 |
| Wind speed (mph) | 4.8 | 5.0 | 5.1 | 4.6 | 4.0 | 3.6 | 3.5 | 3.4 | 3.6 | 3.8 | 3.8 | 4.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 72 | 69 | 67 | 65 | 69 | 80 |
| Relative humidity (%) | 84 | 81 | 80 | 78 | 80 | 83 |
| Wind speed (mph) | 4.8 | 5.0 | 5.1 | 4.6 | 4.0 | 3.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 63 | 70 | 66 | 66 | 69 |
| Relative humidity (%) | 85 | 84 | 84 | 84 | 84 | 84 |
| Wind speed (mph) | 3.5 | 3.4 | 3.6 | 3.8 | 3.8 | 4.4 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Sakai, 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.