Iida, Japan climate
Cfa Humid subtropical
Iida has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 32°C, while the coldest is January averaging around −4°C at night. Around 1688 mm of precipitation falls each year, peaking in July (240 mm) and easing off in January (63 mm).
☀️
Summers
Hot
Highs near 32°C in August.
❄️
Winters
Cold
Lows near −4°C in January.
🌧️
Rain
Very wet
About 1688 mm of rain a year.
Wettest in July
⛅
Sky & trend
Often cloudy
Cloudy skies 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)Iida climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 8 | 12 | 19 | 24 | 27 | 30 | 32 | 27 | 21 | 15 | 9 |
| Avg temp (°C) | 1 | 2 | 6 | 12 | 17 | 21 | 24 | 25 | 22 | 15 | 9 | 3 |
| Avg low (°C) | −4 | −3 | 1 | 6 | 11 | 16 | 20 | 21 | 17 | 11 | 4 | −1 |
| Precipitation (mm) | 63 | 79 | 139 | 141 | 154 | 192 | 240 | 149 | 209 | 163 | 93 | 65 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 8 | 12 | 19 | 24 | 27 |
| Avg temp (°C) | 1 | 2 | 6 | 12 | 17 | 21 |
| Avg low (°C) | −4 | −3 | 1 | 6 | 11 | 16 |
| Precipitation (mm) | 63 | 79 | 139 | 141 | 154 | 192 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 32 | 27 | 21 | 15 | 9 |
| Avg temp (°C) | 24 | 25 | 22 | 15 | 9 | 3 |
| Avg low (°C) | 20 | 21 | 17 | 11 | 4 | −1 |
| Precipitation (mm) | 240 | 149 | 209 | 163 | 93 | 65 |
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 (%) | 88 | 86 | 83 | 80 | 80 | 85 | 87 | 86 | 87 | 86 | 86 | 87 |
| Wind speed (m/s) | 2.5 | 2.5 | 2.4 | 2.2 | 1.9 | 1.6 | 1.7 | 1.4 | 1.5 | 1.5 | 1.8 | 2.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 58 | 62 | 64 | 69 | 81 |
| Relative humidity (%) | 88 | 86 | 83 | 80 | 80 | 85 |
| Wind speed (m/s) | 2.5 | 2.5 | 2.4 | 2.2 | 1.9 | 1.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 68 | 71 | 63 | 57 | 57 |
| Relative humidity (%) | 87 | 86 | 87 | 86 | 86 | 87 |
| Wind speed (m/s) | 1.7 | 1.4 | 1.5 | 1.5 | 1.8 | 2.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Iida, inside the city.
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.