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Narutochō-mitsuishi, Japan climate
Cfa Humid subtropical
Narutochō-mitsuishi has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 89°F, while the coldest is January averaging around 35°F at night. Precipitation totals about 57 inches a year and is strongly seasonal — September alone averages 8.9 inches while January barely receives 1.45 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)Narutochō-mitsuishi climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 50 | 52 | 58 | 66 | 74 | 80 | 86 | 89 | 83 | 74 | 64 | 54 |
| Avg temp (°F) | 42 | 43 | 48 | 57 | 65 | 72 | 79 | 81 | 75 | 66 | 56 | 47 |
| Avg low (°F) | 35 | 35 | 39 | 47 | 57 | 66 | 74 | 75 | 69 | 58 | 48 | 40 |
| Precipitation (in) | 1.4 | 2.3 | 3.4 | 3.5 | 4.5 | 6.7 | 7.8 | 5.6 | 8.9 | 7.3 | 2.9 | 2.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 50 | 52 | 58 | 66 | 74 | 80 |
| Avg temp (°F) | 42 | 43 | 48 | 57 | 65 | 72 |
| Avg low (°F) | 35 | 35 | 39 | 47 | 57 | 66 |
| Precipitation (in) | 1.4 | 2.3 | 3.4 | 3.5 | 4.5 | 6.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 86 | 89 | 83 | 74 | 64 | 54 |
| Avg temp (°F) | 79 | 81 | 75 | 66 | 56 | 47 |
| Avg low (°F) | 74 | 75 | 69 | 58 | 48 | 40 |
| Precipitation (in) | 7.8 | 5.6 | 8.9 | 7.3 | 2.9 | 2.9 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 73 | 68 | 65 | 67 | 78 | 72 | 62 | 69 | 66 | 70 | 73 |
| Relative humidity (%) | 77 | 75 | 74 | 75 | 79 | 84 | 86 | 83 | 80 | 77 | 76 | 76 |
| Wind speed (mph) | 8.9 | 8.9 | 8.5 | 7.1 | 5.7 | 5.1 | 5.0 | 5.4 | 6.6 | 7.6 | 7.6 | 8.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 73 | 68 | 65 | 67 | 78 |
| Relative humidity (%) | 77 | 75 | 74 | 75 | 79 | 84 |
| Wind speed (mph) | 8.9 | 8.9 | 8.5 | 7.1 | 5.7 | 5.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 72 | 62 | 69 | 66 | 70 | 73 |
| Relative humidity (%) | 86 | 83 | 80 | 77 | 76 | 76 |
| Wind speed (mph) | 5.0 | 5.4 | 6.6 | 7.6 | 7.6 | 8.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Nandan, about 10 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.