Home › Cities › Japan › Niigata
Niigata, Japan climate
Cfa Humid subtropical
Niigata 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 32°F at night. Around 73 inches of precipitation falls each year, peaking in December (8.9 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)Niigata climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 42 | 44 | 51 | 61 | 70 | 77 | 84 | 87 | 80 | 69 | 58 | 48 |
| Avg temp (°F) | 37 | 38 | 43 | 52 | 62 | 70 | 77 | 80 | 73 | 62 | 51 | 42 |
| Avg low (°F) | 32 | 32 | 36 | 45 | 55 | 64 | 71 | 74 | 66 | 55 | 44 | 36 |
| Precipitation (in) | 7.1 | 4.6 | 4.4 | 3.8 | 3.7 | 4.8 | 8.8 | 6.4 | 6.0 | 6.2 | 8.0 | 8.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 42 | 44 | 51 | 61 | 70 | 77 |
| Avg temp (°F) | 37 | 38 | 43 | 52 | 62 | 70 |
| Avg low (°F) | 32 | 32 | 36 | 45 | 55 | 64 |
| Precipitation (in) | 7.1 | 4.6 | 4.4 | 3.8 | 3.7 | 4.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 84 | 87 | 80 | 69 | 58 | 48 |
| Avg temp (°F) | 77 | 80 | 73 | 62 | 51 | 42 |
| Avg low (°F) | 71 | 74 | 66 | 55 | 44 | 36 |
| Precipitation (in) | 8.8 | 6.4 | 6.0 | 6.2 | 8.0 | 8.9 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 86 | 81 | 77 | 73 | 70 | 78 | 79 | 69 | 76 | 75 | 78 | 84 |
| Relative humidity (%) | 79 | 76 | 74 | 77 | 80 | 82 | 85 | 80 | 76 | 73 | 75 | 78 |
| Wind speed (mph) | 13.9 | 13.2 | 10.9 | 8.1 | 6.0 | 5.3 | 5.1 | 6.0 | 7.6 | 9.0 | 10.7 | 13.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 86 | 81 | 77 | 73 | 70 | 78 |
| Relative humidity (%) | 79 | 76 | 74 | 77 | 80 | 82 |
| Wind speed (mph) | 13.9 | 13.2 | 10.9 | 8.1 | 6.0 | 5.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 79 | 69 | 76 | 75 | 78 | 84 |
| Relative humidity (%) | 85 | 80 | 76 | 73 | 75 | 78 |
| Wind speed (mph) | 5.1 | 6.0 | 7.6 | 9.0 | 10.7 | 13.1 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Niigata, 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.