Climate averages 1991–2020
Iida weather
in May.
A mild, very wet month: the 5th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Iida: daytime highs average 21.2°C and nights cool to about 11.3°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 191 mm of rain on roughly 14 days, which makes May a very wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 01 min on an average May day.
The nearest other city in this atlas is Nakatsugawa (29 km away). In May its highs average 21.9°C, 0.7°C warmer than Iida, with 204 mm of rain.
Among the 303 cities listed in Japan, Iida ranks joint 194th of 303 for the warmest May highs and joint 277th of 303 for the driest May (rainfall, lowest first). The mean May high of those 303 cities is 21.3°C; Iida is 0.2°C cooler than that mean.
From May to June, average highs rise by 3.0°C to 24.2°C, and monthly rainfall rises from 191 mm to 263 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Nakatsugawa in MayJapan · 29 kmHigh 21.9°C · Low 11.1°C · 204 mm rain
- Minami-Alps in MayJapan · 59 kmHigh 22.1°C · Low 12.3°C · 175 mm rain
- Kai in MayJapan · 65 kmHigh 22.2°C · Low 12.3°C · 129 mm rain
- Tajimi in MayJapan · 66 kmHigh 22.2°C · Low 12.0°C · 178 mm rain
- Kofu in MayJapan · 69 kmHigh 22.6°C · Low 12.4°C · 129 mm rain
- Kani in MayJapan · 70 kmHigh 22.1°C · Low 11.6°C · 177 mm rain
- Seto in MayJapan · 73 kmHigh 22.5°C · Low 12.5°C · 144 mm rain
- Toyota in MayJapan · 78 kmHigh 22.6°C · Low 12.6°C · 172 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.