Saga, Japan climate
Cfa Humid subtropical
Saga has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 33°C, while the coldest is January averaging around 2°C at night. Precipitation totals about 1951 mm a year and is strongly seasonal — July alone averages 367 mm while January barely receives 54 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)Saga climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 12 | 15 | 21 | 26 | 28 | 32 | 33 | 29 | 24 | 18 | 12 |
| Avg temp (°C) | 6 | 7 | 10 | 15 | 20 | 24 | 27 | 28 | 25 | 19 | 13 | 8 |
| Avg low (°C) | 2 | 3 | 6 | 10 | 15 | 20 | 24 | 25 | 21 | 15 | 9 | 4 |
| Precipitation (mm) | 54 | 77 | 121 | 162 | 183 | 327 | 367 | 252 | 169 | 90 | 89 | 60 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 12 | 15 | 21 | 26 | 28 |
| Avg temp (°C) | 6 | 7 | 10 | 15 | 20 | 24 |
| Avg low (°C) | 2 | 3 | 6 | 10 | 15 | 20 |
| Precipitation (mm) | 54 | 77 | 121 | 162 | 183 | 327 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 33 | 29 | 24 | 18 | 12 |
| Avg temp (°C) | 27 | 28 | 25 | 19 | 13 | 8 |
| Avg low (°C) | 24 | 25 | 21 | 15 | 9 | 4 |
| Precipitation (mm) | 367 | 252 | 169 | 90 | 89 | 60 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 73 | 70 | 67 | 68 | 81 | 73 | 66 | 67 | 60 | 65 | 71 |
| Relative humidity (%) | 75 | 74 | 74 | 76 | 79 | 85 | 86 | 83 | 81 | 76 | 74 | 75 |
| Wind speed (km/h) | 14.7 | 14.2 | 13.6 | 11.7 | 9.8 | 9.1 | 9.4 | 9.8 | 11.8 | 12.7 | 12.6 | 14.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 73 | 70 | 67 | 68 | 81 |
| Relative humidity (%) | 75 | 74 | 74 | 76 | 79 | 85 |
| Wind speed (km/h) | 14.7 | 14.2 | 13.6 | 11.7 | 9.8 | 9.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 66 | 67 | 60 | 65 | 71 |
| Relative humidity (%) | 86 | 83 | 81 | 76 | 74 | 75 |
| Wind speed (km/h) | 9.4 | 9.8 | 11.8 | 12.7 | 12.6 | 14.1 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Saga, about 4 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.