Gero, Japan climate
Cfa Humid subtropical
Gero has a seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 88°F, while the coldest is January averaging around 25°F at night. Precipitation totals about 96 inches a year and is strongly seasonal — July alone averages 15.7 inches while January barely receives 3.16 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)Gero climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 42 | 45 | 53 | 64 | 73 | 79 | 85 | 88 | 80 | 69 | 58 | 46 |
| Avg temp (°F) | 33 | 34 | 41 | 51 | 61 | 68 | 74 | 76 | 69 | 58 | 46 | 37 |
| Avg low (°F) | 25 | 26 | 31 | 40 | 50 | 59 | 67 | 69 | 62 | 50 | 38 | 29 |
| Precipitation (in) | 3.2 | 3.8 | 6.5 | 7.3 | 7.8 | 10.8 | 15.7 | 12.6 | 11.9 | 7.2 | 5.2 | 3.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 42 | 45 | 53 | 64 | 73 | 79 |
| Avg temp (°F) | 33 | 34 | 41 | 51 | 61 | 68 |
| Avg low (°F) | 25 | 26 | 31 | 40 | 50 | 59 |
| Precipitation (in) | 3.2 | 3.8 | 6.5 | 7.3 | 7.8 | 10.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 85 | 88 | 80 | 69 | 58 | 46 |
| Avg temp (°F) | 74 | 76 | 69 | 58 | 46 | 37 |
| Avg low (°F) | 67 | 69 | 62 | 50 | 38 | 29 |
| Precipitation (in) | 15.7 | 12.6 | 11.9 | 7.2 | 5.2 | 3.9 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 58 | 62 | 64 | 69 | 81 | 77 | 68 | 71 | 63 | 57 | 57 |
| Relative humidity (%) | 95 | 92 | 87 | 81 | 80 | 84 | 87 | 86 | 87 | 87 | 89 | 93 |
| Wind speed (mph) | 4.9 | 5.0 | 4.9 | 4.5 | 3.8 | 3.1 | 3.2 | 2.7 | 2.9 | 3.2 | 3.7 | 4.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 58 | 62 | 64 | 69 | 81 |
| Relative humidity (%) | 95 | 92 | 87 | 81 | 80 | 84 |
| Wind speed (mph) | 4.9 | 5.0 | 4.9 | 4.5 | 3.8 | 3.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 68 | 71 | 63 | 57 | 57 |
| Relative humidity (%) | 87 | 86 | 87 | 87 | 89 | 93 |
| Wind speed (mph) | 3.2 | 2.7 | 2.9 | 3.2 | 3.7 | 4.6 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Miyaji, about 6 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.