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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 87°F, while the coldest is January averaging around 31°F at night. Around 81 inches of precipitation falls each year, peaking in December (11.3 inches) and easing off in May (3.7 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)Tsubame climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 41 | 42 | 50 | 62 | 72 | 78 | 84 | 87 | 81 | 69 | 58 | 46 |
| Avg temp (°F) | 36 | 36 | 42 | 52 | 63 | 70 | 77 | 79 | 72 | 61 | 50 | 40 |
| Avg low (°F) | 31 | 31 | 35 | 43 | 54 | 63 | 71 | 73 | 65 | 54 | 43 | 35 |
| Precipitation (in) | 8.6 | 5.4 | 4.9 | 3.9 | 3.7 | 5.2 | 9.6 | 6.8 | 5.7 | 6.3 | 9.3 | 11.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 41 | 42 | 50 | 62 | 72 | 78 |
| Avg temp (°F) | 36 | 36 | 42 | 52 | 63 | 70 |
| Avg low (°F) | 31 | 31 | 35 | 43 | 54 | 63 |
| Precipitation (in) | 8.6 | 5.4 | 4.9 | 3.9 | 3.7 | 5.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 84 | 87 | 81 | 69 | 58 | 46 |
| Avg temp (°F) | 77 | 79 | 72 | 61 | 50 | 40 |
| Avg low (°F) | 71 | 73 | 65 | 54 | 43 | 35 |
| Precipitation (in) | 9.6 | 6.8 | 5.7 | 6.3 | 9.3 | 11.3 |
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 (mph) | 7.0 | 7.5 | 6.0 | 4.3 | 3.0 | 2.6 | 2.5 | 2.8 | 3.4 | 3.9 | 4.6 | 5.9 |
| 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 (mph) | 7.0 | 7.5 | 6.0 | 4.3 | 3.0 | 2.6 |
| 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 (mph) | 2.5 | 2.8 | 3.4 | 3.9 | 4.6 | 5.9 |
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.