Climate averages 1991–2020
Iida weather
in August.
A hot, very wet month: the warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Iida: daytime highs average 28.8°C and nights cool to about 20.9°C. By daytime temperature it is the warmest month of the year.
Expect about 184 mm of rain on roughly 19 days, which makes August a very wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 30 min on an average August day.
The nearest other city in this atlas is Nakatsugawa (29 km away). In August its highs average 29.6°C, 0.8°C warmer than Iida, with 198 mm of rain.
Among the 303 cities listed in Japan, Iida ranks joint 210th of 303 for the warmest August highs and joint 264th of 303 for the driest August (rainfall, lowest first). The mean August high of those 303 cities is 29.2°C; Iida is 0.4°C cooler than that mean.
From August to September, average highs fall by 3.5°C to 25.3°C, and monthly rainfall rises from 184 mm to 228 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Iida climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.0°C-4.5°C | -4.5°C | 99 | 11.8 | 10.010 h |
| February | 5.3°C-3.9°C | -3.9°C | 109 | 10.4 | 10.911 h |
| March | 9.7°C0.4°C | 0.4°C | 171 | 13.1 | 11.912 h |
| April | 16.3°C5.9°C | 5.9°C | 174 | 12.8 | 13.113 h |
| May | 21.2°C11.3°C | 11.3°C | 191 | 13.7 | 14.014 h |
| June | 24.2°C16.0°C | 16.0°C | 263 | 18.0 | 14.515 h |
| July | 27.5°C20.1°C | 20.1°C | 308 | 20.3 | 14.314 h |
| August, selected | 28.8°C20.9°C | 20.9°C | 184 | 18.5 | 13.513 h |
| September | 25.3°C17.4°C | 17.4°C | 228 | 15.5 | 12.412 h |
| October | 19.8°C11.3°C | 11.3°C | 210 | 12.9 | 11.311 h |
| November | 13.8°C5.0°C | 5.0°C | 126 | 10.4 | 10.310 h |
| December | 7.3°C-0.7°C | -0.7°C | 100 | 12.0 | 9.810 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Nakatsugawa in AugustJapan · 29 kmHigh 29.6°C · Low 21.3°C · 198 mm rain
- Minami-Alps in AugustJapan · 59 kmHigh 29.0°C · Low 21.5°C · 192 mm rain
- Kai in AugustJapan · 65 kmHigh 29.1°C · Low 21.5°C · 139 mm rain
- Tajimi in AugustJapan · 66 kmHigh 30.2°C · Low 22.4°C · 168 mm rain
- Kofu in AugustJapan · 69 kmHigh 29.5°C · Low 21.8°C · 139 mm rain
- Kani in AugustJapan · 70 kmHigh 30.0°C · Low 22.1°C · 156 mm rain
- Seto in AugustJapan · 73 kmHigh 30.5°C · Low 22.9°C · 111 mm rain
- Toyota in AugustJapan · 78 kmHigh 30.4°C · Low 23.1°C · 174 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Iida) is explained once on the Iida year overview and on the Sources, method and limits page.