Saiki, Japan climate
Cfa Humid subtropical
Saiki has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 88°F, while the coldest is January averaging around 37°F at night. Precipitation totals about 84 inches a year and is strongly seasonal — September alone averages 13.3 inches while December barely receives 2.37 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)Saiki climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 52 | 53 | 59 | 67 | 75 | 79 | 86 | 88 | 82 | 74 | 65 | 56 |
| Avg temp (°F) | 44 | 46 | 51 | 59 | 67 | 72 | 79 | 81 | 75 | 66 | 57 | 48 |
| Avg low (°F) | 37 | 38 | 43 | 51 | 59 | 67 | 74 | 75 | 70 | 60 | 49 | 40 |
| Precipitation (in) | 2.5 | 2.8 | 4.6 | 5.4 | 7.0 | 13.1 | 11.1 | 9.7 | 13.3 | 7.9 | 4.1 | 2.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 52 | 53 | 59 | 67 | 75 | 79 |
| Avg temp (°F) | 44 | 46 | 51 | 59 | 67 | 72 |
| Avg low (°F) | 37 | 38 | 43 | 51 | 59 | 67 |
| Precipitation (in) | 2.5 | 2.8 | 4.6 | 5.4 | 7.0 | 13.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 86 | 88 | 82 | 74 | 65 | 56 |
| Avg temp (°F) | 79 | 81 | 75 | 66 | 57 | 48 |
| Avg low (°F) | 74 | 75 | 70 | 60 | 49 | 40 |
| Precipitation (in) | 11.1 | 9.7 | 13.3 | 7.9 | 4.1 | 2.4 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 64 | 65 | 65 | 72 | 84 | 72 | 66 | 70 | 60 | 58 | 57 |
| Relative humidity (%) | 78 | 76 | 75 | 76 | 79 | 84 | 85 | 84 | 83 | 79 | 78 | 78 |
| Wind speed (mph) | 5.9 | 5.7 | 5.3 | 4.4 | 3.5 | 2.9 | 2.7 | 3.0 | 3.8 | 4.6 | 5.0 | 5.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 64 | 65 | 65 | 72 | 84 |
| Relative humidity (%) | 78 | 76 | 75 | 76 | 79 | 84 |
| Wind speed (mph) | 5.9 | 5.7 | 5.3 | 4.4 | 3.5 | 2.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 72 | 66 | 70 | 60 | 58 | 57 |
| Relative humidity (%) | 85 | 84 | 83 | 79 | 78 | 78 |
| Wind speed (mph) | 2.7 | 3.0 | 3.8 | 4.6 | 5.0 | 5.7 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Saiki, inside the city.
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.