Climate averages 1991–2020
Kai weather
in May.
A warm, wet month: the 5th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Kai: daytime highs average 22.2°C and nights cool to about 12.3°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 129 mm of rain on roughly 13 days, which makes May a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 02 min on an average May day.
The nearest other city in this atlas is Kofu (6 km away). In May its highs average 22.6°C, about as warm as Kai, with 129 mm of rain.
Among the 303 cities listed in Japan, Kai ranks joint 107th of 303 for the warmest May highs and joint 68th of 303 for the driest May (rainfall, lowest first). The mean May high of those 303 cities is 21.3°C; Kai is 0.8°C warmer than that mean.
From May to June, average highs rise by 2.7°C to 24.9°C, and monthly rainfall rises from 129 mm to 177 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
Kai climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 5.8°C-2.4°C | -2.4°C | 65 | 6.8 | 10.010 h |
| February | 6.9°C-2.2°C | -2.2°C | 73 | 8.1 | 10.911 h |
| March | 11.0°C1.4°C | 1.4°C | 125 | 12.8 | 11.912 h |
| April | 17.4°C7.0°C | 7.0°C | 120 | 12.6 | 13.113 h |
| May, selected | 22.2°C12.3°C | 12.3°C | 129 | 12.8 | 14.014 h |
| June | 24.9°C16.7°C | 16.7°C | 177 | 16.3 | 14.515 h |
| July | 28.3°C20.6°C | 20.6°C | 199 | 17.4 | 14.314 h |
| August | 29.1°C21.5°C | 21.5°C | 139 | 16.8 | 13.514 h |
| September | 25.3°C17.8°C | 17.8°C | 185 | 14.6 | 12.412 h |
| October | 19.8°C11.9°C | 11.9°C | 186 | 13.0 | 11.311 h |
| November | 14.6°C6.3°C | 6.3°C | 85 | 9.2 | 10.310 h |
| December | 8.9°C1.2°C | 1.2°C | 60 | 7.4 | 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
- Kofu in MayJapan · 6 kmHigh 22.6°C · Low 12.4°C · 129 mm rain
- Minami-Alps in MayJapan · 9 kmHigh 22.1°C · Low 12.3°C · 175 mm rain
- Fujinomiya in MayJapan · 53 kmHigh 21.2°C · Low 13.0°C · 232 mm rain
- Gotemba in MayJapan · 57 kmHigh 20.5°C · Low 11.8°C · 186 mm rain
- Saku in MayJapan · 59 kmHigh 20.6°C · Low 10.6°C · 131 mm rain
- Fuji, Japan in MayJapan · 60 kmHigh 22.0°C · Low 14.2°C · 194 mm rain
- Iida in MayJapan · 65 kmHigh 21.2°C · Low 11.3°C · 191 mm rain
- Akiruno in MayJapan · 65 kmHigh 21.6°C · Low 12.8°C · 166 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 Kai) is explained once on the Kai year overview and on the Sources, method and limits page.
Kofu lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.