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Tsubame, Japan climate
Cfa Humid subtropical
Tsubame has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 31°C, while the coldest is January averaging around −1°C at night. Around 2049 mm of precipitation falls each year, peaking in December (288 mm) and easing off in May (94 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)Tsubame climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 6 | 10 | 17 | 22 | 26 | 29 | 31 | 27 | 21 | 14 | 8 |
| Avg temp (°C) | 2 | 2 | 6 | 11 | 17 | 21 | 25 | 26 | 22 | 16 | 10 | 5 |
| Avg low (°C) | −1 | −1 | 2 | 6 | 12 | 17 | 22 | 23 | 18 | 12 | 6 | 2 |
| Precipitation (mm) | 220 | 137 | 124 | 98 | 94 | 133 | 243 | 172 | 145 | 160 | 237 | 288 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 6 | 10 | 17 | 22 | 26 |
| Avg temp (°C) | 2 | 2 | 6 | 11 | 17 | 21 |
| Avg low (°C) | −1 | −1 | 2 | 6 | 12 | 17 |
| Precipitation (mm) | 220 | 137 | 124 | 98 | 94 | 133 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 31 | 27 | 21 | 14 | 8 |
| Avg temp (°C) | 25 | 26 | 22 | 16 | 10 | 5 |
| Avg low (°C) | 22 | 23 | 18 | 12 | 6 | 2 |
| Precipitation (mm) | 243 | 172 | 145 | 160 | 237 | 288 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 90 | 85 | 78 | 69 | 68 | 76 | 77 | 66 | 73 | 71 | 76 | 86 |
| Relative humidity (%) | 86 | 83 | 79 | 77 | 78 | 80 | 83 | 80 | 80 | 80 | 82 | 85 |
| Wind speed (km/h) | 11.3 | 12.1 | 9.7 | 6.8 | 4.9 | 4.1 | 4.0 | 4.5 | 5.4 | 6.2 | 7.3 | 9.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 90 | 85 | 78 | 69 | 68 | 76 |
| Relative humidity (%) | 86 | 83 | 79 | 77 | 78 | 80 |
| Wind speed (km/h) | 11.3 | 12.1 | 9.7 | 6.8 | 4.9 | 4.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 66 | 73 | 71 | 76 | 86 |
| Relative humidity (%) | 83 | 80 | 80 | 80 | 82 | 85 |
| Wind speed (km/h) | 4.0 | 4.5 | 5.4 | 6.2 | 7.3 | 9.5 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Sanjo, 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.