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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 91°F, while the coldest is January averaging around 36°F at night. Precipitation totals about 93 inches a year and is strongly seasonal — June alone averages 19.9 inches while January barely receives 3.35 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)Sendai climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 53 | 56 | 62 | 70 | 77 | 81 | 88 | 91 | 86 | 78 | 68 | 58 |
| Avg temp (°F) | 44 | 46 | 52 | 60 | 67 | 74 | 81 | 82 | 76 | 67 | 57 | 47 |
| Avg low (°F) | 36 | 37 | 42 | 50 | 59 | 67 | 74 | 75 | 69 | 58 | 48 | 39 |
| Precipitation (in) | 3.3 | 4.5 | 6.2 | 7.1 | 8.2 | 19.9 | 13.2 | 9.4 | 9.1 | 3.7 | 4.4 | 4.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 53 | 56 | 62 | 70 | 77 | 81 |
| Avg temp (°F) | 44 | 46 | 52 | 60 | 67 | 74 |
| Avg low (°F) | 36 | 37 | 42 | 50 | 59 | 67 |
| Precipitation (in) | 3.3 | 4.5 | 6.2 | 7.1 | 8.2 | 19.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 88 | 91 | 86 | 78 | 68 | 58 |
| Avg temp (°F) | 81 | 82 | 76 | 67 | 57 | 47 |
| Avg low (°F) | 74 | 75 | 69 | 58 | 48 | 39 |
| Precipitation (in) | 13.2 | 9.4 | 9.1 | 3.7 | 4.4 | 4.1 |
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 (mph) | 3.4 | 3.5 | 3.4 | 3.1 | 2.6 | 2.5 | 2.5 | 2.6 | 2.5 | 2.6 | 2.9 | 3.3 |
| 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 (mph) | 3.4 | 3.5 | 3.4 | 3.1 | 2.6 | 2.5 |
| 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 (mph) | 2.5 | 2.6 | 2.5 | 2.6 | 2.9 | 3.3 |
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.