Climate averages 1991–2020
Aomori weather
in September.
A warm, 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 Aomori: daytime highs average 22.9°C and nights cool to about 15.8°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 145 mm of rain on roughly 13 days, which makes September a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 31 min on an average September day.
The nearest other city in this atlas is Hirosaki (33 km away). In September its highs average 22.7°C, about as warm as Aomori, with 154 mm of rain.
Among the 303 cities listed in Japan, Aomori ranks joint 283rd of 303 for the warmest September highs and joint 18th of 303 for the driest September (rainfall, lowest first). The mean September high of those 303 cities is 25.7°C; Aomori is 2.7°C cooler than that mean.
From September to October, average highs fall by 6.3°C to 16.6°C, and monthly rainfall falls from 145 mm to 112 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
Aomori climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -0.1°C-6.3°C | -6.3°C | 65 | 13.3 | 9.610 h |
| February | 0.8°C-5.9°C | -5.9°C | 66 | 13.1 | 10.611 h |
| March | 4.7°C-3.1°C | -3.1°C | 86 | 15.1 | 11.912 h |
| April | 12.4°C2.7°C | 2.7°C | 86 | 13.5 | 13.313 h |
| May | 18.5°C8.7°C | 8.7°C | 101 | 12.9 | 14.414 h |
| June | 22.4°C13.7°C | 13.7°C | 104 | 12.4 | 15.015 h |
| July | 25.6°C18.4°C | 18.4°C | 158 | 15.3 | 14.815 h |
| August | 26.7°C19.7°C | 19.7°C | 169 | 15.5 | 13.814 h |
| September, selected | 22.9°C15.8°C | 15.8°C | 145 | 13.0 | 12.513 h |
| October | 16.6°C9.1°C | 9.1°C | 112 | 13.0 | 11.211 h |
| November | 9.5°C2.7°C | 2.7°C | 87 | 14.6 | 10.010 h |
| December | 2.6°C-3.4°C | -3.4°C | 82 | 14.6 | 9.39 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
- Hirosaki in SeptemberJapan · 33 kmHigh 22.7°C · Low 14.9°C · 154 mm rain
- Hachinohe in SeptemberJapan · 74 kmHigh 22.9°C · Low 16.0°C · 127 mm rain
- Hakodate in SeptemberJapan · 107 kmHigh 21.3°C · Low 16.9°C · 185 mm rain
- Morioka in SeptemberJapan · 129 kmHigh 21.9°C · Low 14.8°C · 137 mm rain
- Akita in SeptemberJapan · 133 kmHigh 23.0°C · Low 17.5°C · 190 mm rain
- Daisen in SeptemberJapan · 154 kmHigh 23.3°C · Low 15.8°C · 152 mm rain
- Hanamaki in SeptemberJapan · 163 kmHigh 22.5°C · Low 15.3°C · 147 mm rain
- Yokote in SeptemberJapan · 167 kmHigh 23.1°C · Low 15.8°C · 156 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 Aomori) is explained once on the Aomori year overview and on the Sources, method and limits page.