Nanto, Japan climate
Cfa Humid subtropical
Nanto 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 30°F at night. Around 88 inches of precipitation falls each year, peaking in December (10.6 inches) and easing off in May (4.3 inches).
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Summers
Warm
Highs near 87°F in August.
❄️
Winters
Cold
Lows near 30°F in January.
🌧️
Rain
Very wet
About 88 in of rain a year.
Wettest in December
⛅
Sky & trend
Often grey
Overcast skies dominate much of the year.
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)Nanto climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 42 | 44 | 51 | 62 | 72 | 77 | 84 | 87 | 79 | 69 | 59 | 48 |
| Avg temp (°F) | 36 | 36 | 43 | 53 | 62 | 69 | 76 | 79 | 71 | 61 | 51 | 41 |
| Avg low (°F) | 30 | 30 | 35 | 44 | 54 | 63 | 71 | 72 | 65 | 54 | 44 | 35 |
| Precipitation (in) | 9.4 | 6.0 | 5.6 | 4.6 | 4.3 | 6.6 | 9.0 | 7.9 | 8.4 | 6.6 | 8.7 | 10.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 42 | 44 | 51 | 62 | 72 | 77 |
| Avg temp (°F) | 36 | 36 | 43 | 53 | 62 | 69 |
| Avg low (°F) | 30 | 30 | 35 | 44 | 54 | 63 |
| Precipitation (in) | 9.4 | 6.0 | 5.6 | 4.6 | 4.3 | 6.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 84 | 87 | 79 | 69 | 59 | 48 |
| Avg temp (°F) | 76 | 79 | 71 | 61 | 51 | 41 |
| Avg low (°F) | 71 | 72 | 65 | 54 | 44 | 35 |
| Precipitation (in) | 9.0 | 7.9 | 8.4 | 6.6 | 8.7 | 10.6 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 90 | 86 | 78 | 72 | 73 | 81 | 79 | 69 | 76 | 72 | 77 | 86 |
| Relative humidity (%) | 89 | 87 | 82 | 76 | 75 | 79 | 82 | 81 | 82 | 83 | 84 | 88 |
| Wind speed (mph) | 7.7 | 7.6 | 7.6 | 7.2 | 6.3 | 5.3 | 5.6 | 5.1 | 5.5 | 5.8 | 6.6 | 7.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 90 | 86 | 78 | 72 | 73 | 81 |
| Relative humidity (%) | 89 | 87 | 82 | 76 | 75 | 79 |
| Wind speed (mph) | 7.7 | 7.6 | 7.6 | 7.2 | 6.3 | 5.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 79 | 69 | 76 | 72 | 77 | 86 |
| Relative humidity (%) | 82 | 81 | 82 | 83 | 84 | 88 |
| Wind speed (mph) | 5.6 | 5.1 | 5.5 | 5.8 | 6.6 | 7.5 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Tonami, about 12 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.