Climate averages 1991–2020
Azumino weather
in September.
A warm, very wet month: the 3rd warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Azumino: daytime highs average 24.2°C and nights cool to about 16.3°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 199 mm of rain on roughly 16 days, which makes September a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 27 min on an average September day.
The nearest other city in this atlas is Matsumoto (9 km away). In September its highs average 24.3°C, about as warm as Azumino, with 199 mm of rain.
Among the 303 cities listed in Japan, Azumino ranks 258th of 303 for the warmest September highs and joint 190th of 303 for the driest September (rainfall, lowest first). The mean September high of those 303 cities is 25.7°C; Azumino is 1.5°C cooler than that mean.
From September to October, average highs fall by 5.8°C to 18.4°C, and monthly rainfall falls from 199 mm to 193 mm.
The annual picture
September in context
Monthly precipitation
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
Azumino climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.6°C-6.7°C | -6.7°C | 106 | 15.3 | 10.010 h |
| February | 2.9°C-5.8°C | -5.8°C | 100 | 12.6 | 10.811 h |
| March | 7.1°C-1.7°C | -1.7°C | 155 | 15.0 | 11.912 h |
| April | 13.8°C3.5°C | 3.5°C | 138 | 13.6 | 13.113 h |
| May | 20.6°C9.9°C | 9.9°C | 156 | 14.2 | 14.114 h |
| June | 23.9°C15.2°C | 15.2°C | 224 | 18.2 | 14.615 h |
| July | 27.2°C19.2°C | 19.2°C | 246 | 19.3 | 14.414 h |
| August | 28.3°C20.3°C | 20.3°C | 155 | 15.0 | 13.514 h |
| September, selected | 24.2°C16.3°C | 16.3°C | 199 | 15.8 | 12.412 h |
| October | 18.4°C9.5°C | 9.5°C | 193 | 15.3 | 11.311 h |
| November | 12.1°C2.5°C | 2.5°C | 115 | 13.3 | 10.310 h |
| December | 4.9°C-3.8°C | -3.8°C | 107 | 15.5 | 9.710 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet 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
- Matsumoto in SeptemberJapan · 9 kmHigh 24.3°C · Low 16.2°C · 199 mm rain
- Ueda in SeptemberJapan · 38 kmHigh 24.4°C · Low 16.2°C · 161 mm rain
- Nagano in SeptemberJapan · 48 kmHigh 23.9°C · Low 15.9°C · 182 mm rain
- Saku in SeptemberJapan · 54 kmHigh 23.7°C · Low 16.4°C · 187 mm rain
- Takayama in SeptemberJapan · 60 kmHigh 23.1°C · Low 15.3°C · 216 mm rain
- Toyama in SeptemberJapan · 75 kmHigh 24.3°C · Low 17.1°C · 211 mm rain
- Iida in SeptemberJapan · 86 kmHigh 25.3°C · Low 17.4°C · 228 mm rain
- Imizu in SeptemberJapan · 86 kmHigh 24.6°C · Low 17.8°C · 211 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 Azumino) is explained once on the Azumino year overview and on the Sources, method and limits page.
Matsumoto lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.