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Sendai, Japan climate
Cfa Humid subtropical
Sendai 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 2366 mm a year and is strongly seasonal — June alone averages 507 mm while January barely receives 85 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)Sendai climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 12 | 13 | 17 | 21 | 25 | 27 | 31 | 33 | 30 | 25 | 20 | 14 |
| Avg temp (°C) | 7 | 8 | 11 | 16 | 20 | 23 | 27 | 28 | 25 | 19 | 14 | 9 |
| Avg low (°C) | 2 | 3 | 6 | 10 | 15 | 20 | 24 | 24 | 21 | 15 | 9 | 4 |
| Precipitation (mm) | 85 | 114 | 156 | 179 | 209 | 507 | 334 | 239 | 231 | 95 | 111 | 105 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 12 | 13 | 17 | 21 | 25 | 27 |
| Avg temp (°C) | 7 | 8 | 11 | 16 | 20 | 23 |
| Avg low (°C) | 2 | 3 | 6 | 10 | 15 | 20 |
| Precipitation (mm) | 85 | 114 | 156 | 179 | 209 | 507 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 33 | 30 | 25 | 20 | 14 |
| Avg temp (°C) | 27 | 28 | 25 | 19 | 14 | 9 |
| Avg low (°C) | 24 | 24 | 21 | 15 | 9 | 4 |
| Precipitation (mm) | 334 | 239 | 231 | 95 | 111 | 105 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 72 | 69 | 67 | 71 | 83 | 66 | 60 | 62 | 56 | 61 | 68 |
| Relative humidity (%) | 83 | 81 | 80 | 79 | 81 | 86 | 86 | 84 | 84 | 82 | 83 | 83 |
| Wind speed (km/h) | 5.5 | 5.6 | 5.4 | 4.9 | 4.2 | 4.1 | 4.0 | 4.1 | 4.0 | 4.2 | 4.6 | 5.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 73 | 72 | 69 | 67 | 71 | 83 |
| Relative humidity (%) | 83 | 81 | 80 | 79 | 81 | 86 |
| Wind speed (km/h) | 5.5 | 5.6 | 5.4 | 4.9 | 4.2 | 4.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 66 | 60 | 62 | 56 | 61 | 68 |
| Relative humidity (%) | 86 | 84 | 84 | 82 | 83 | 83 |
| Wind speed (km/h) | 4.0 | 4.1 | 4.0 | 4.2 | 4.6 | 5.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Sendai, about 2 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.