Climate averages 1991–2020
Minami-Alps weather
in September.
A warm, very wet month: the 3rd warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Minami-Alps: daytime highs average 25.3°C and nights cool to about 17.9°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 270 mm of rain on roughly 18 days, which makes September a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 26 min on an average September day.
The nearest other city in this atlas is Kai (9 km away). In September its highs average 25.3°C, about as warm as Minami-Alps, with 185 mm of rain.
Among the 303 cities listed in Japan, Minami-Alps ranks joint 202nd of 303 for the warmest September highs and 294th of 303 for the driest September (rainfall, lowest first). The mean September high of those 303 cities is 25.7°C; Minami-Alps is 0.4°C cooler than that mean.
From September to October, average highs fall by 5.3°C to 20.0°C, and monthly rainfall falls from 270 mm to 246 mm.
The annual picture
September 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
Minami-Alps climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 6.3°C-2.1°C | -2.1°C | 80 | 7.7 | 10.010 h |
| February | 7.3°C-1.9°C | -1.9°C | 95 | 9.3 | 10.911 h |
| March | 11.3°C1.7°C | 1.7°C | 166 | 14.0 | 11.912 h |
| April | 17.5°C7.1°C | 7.1°C | 168 | 14.1 | 13.113 h |
| May | 22.1°C12.3°C | 12.3°C | 175 | 14.8 | 14.014 h |
| June | 24.8°C16.7°C | 16.7°C | 243 | 18.9 | 14.515 h |
| July | 28.3°C20.6°C | 20.6°C | 269 | 21.3 | 14.314 h |
| August | 29.0°C21.5°C | 21.5°C | 192 | 20.9 | 13.514 h |
| September, selected | 25.3°C17.9°C | 17.9°C | 270 | 18.1 | 12.412 h |
| October | 20.0°C12.1°C | 12.1°C | 246 | 15.6 | 11.311 h |
| November | 14.9°C6.4°C | 6.4°C | 121 | 10.9 | 10.310 h |
| December | 9.3°C1.4°C | 1.4°C | 80 | 8.3 | 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
September in nearby cities
- Kai in SeptemberJapan · 9 kmHigh 25.3°C · Low 17.8°C · 185 mm rain
- Kofu in SeptemberJapan · 11 kmHigh 25.7°C · Low 18.2°C · 185 mm rain
- Fujinomiya in SeptemberJapan · 47 kmHigh 25.6°C · Low 19.6°C · 337 mm rain
- Fuji, Japan in SeptemberJapan · 54 kmHigh 26.5°C · Low 20.7°C · 279 mm rain
- Gotemba in SeptemberJapan · 55 kmHigh 24.6°C · Low 18.5°C · 263 mm rain
- Iida in SeptemberJapan · 59 kmHigh 25.3°C · Low 17.4°C · 228 mm rain
- Saku in SeptemberJapan · 67 kmHigh 23.7°C · Low 16.4°C · 187 mm rain
- Numazu in SeptemberJapan · 68 kmHigh 26.1°C · Low 20.9°C · 243 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 Minami-Alps) is explained once on the Minami-Alps year overview and on the Sources, method and limits page.