Saijō, Japan climate
Cfa Humid subtropical
Saijō has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 32°C, while the coldest is January averaging around 2°C at night. Precipitation totals about 1494 mm a year and is strongly seasonal — September alone averages 230 mm while January barely receives 53 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)Saijō climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 10 | 14 | 19 | 24 | 27 | 31 | 32 | 28 | 23 | 17 | 12 |
| Avg temp (°C) | 6 | 6 | 9 | 14 | 19 | 23 | 27 | 27 | 24 | 18 | 13 | 8 |
| Avg low (°C) | 2 | 2 | 5 | 9 | 14 | 19 | 23 | 24 | 20 | 15 | 9 | 4 |
| Precipitation (mm) | 53 | 69 | 110 | 103 | 127 | 209 | 186 | 125 | 230 | 152 | 71 | 59 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 10 | 14 | 19 | 24 | 27 |
| Avg temp (°C) | 6 | 6 | 9 | 14 | 19 | 23 |
| Avg low (°C) | 2 | 2 | 5 | 9 | 14 | 19 |
| Precipitation (mm) | 53 | 69 | 110 | 103 | 127 | 209 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 32 | 28 | 23 | 17 | 12 |
| Avg temp (°C) | 27 | 27 | 24 | 18 | 13 | 8 |
| Avg low (°C) | 23 | 24 | 20 | 15 | 9 | 4 |
| Precipitation (mm) | 186 | 125 | 230 | 152 | 71 | 59 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 69 | 68 | 66 | 72 | 83 | 75 | 66 | 72 | 65 | 65 | 65 |
| Relative humidity (%) | 81 | 79 | 77 | 76 | 78 | 82 | 83 | 81 | 81 | 81 | 80 | 81 |
| Wind speed (km/h) | 7.7 | 7.5 | 7.2 | 6.1 | 5.0 | 4.3 | 4.5 | 4.9 | 5.7 | 6.3 | 6.5 | 7.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 69 | 68 | 66 | 72 | 83 |
| Relative humidity (%) | 81 | 79 | 77 | 76 | 78 | 82 |
| Wind speed (km/h) | 7.7 | 7.5 | 7.2 | 6.1 | 5.0 | 4.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 66 | 72 | 65 | 65 | 65 |
| Relative humidity (%) | 83 | 81 | 81 | 81 | 80 | 81 |
| Wind speed (km/h) | 4.5 | 4.9 | 5.7 | 6.3 | 6.5 | 7.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Saijo, about 10 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.