Climate averages 1991–2020
Ichinomiya weather
in September.
A warm, very wet month: the 3rd warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Ichinomiya: daytime highs average 26.7°C and nights cool to about 19.1°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 248 mm of rain on roughly 14 days, which makes September a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 26 min on an average September day.
The nearest other city in this atlas is Komaki (11 km away). In September its highs average 26.9°C, about as warm as Ichinomiya, with 186 mm of rain.
Among the 303 cities listed in Japan, Ichinomiya ranks joint 83rd of 303 for the warmest September highs and joint 277th of 303 for the driest September (rainfall, lowest first). The mean September high of those 303 cities is 25.7°C; Ichinomiya is 1.0°C warmer than that mean.
From September to October, average highs fall by 5.5°C to 21.2°C, and monthly rainfall falls from 248 mm to 192 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
Ichinomiya climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.7°C-1.1°C | -1.1°C | 63 | 6.9 | 10.110 h |
| February | 8.9°C-1.0°C | -1.0°C | 70 | 7.3 | 10.911 h |
| March | 12.7°C1.9°C | 1.9°C | 127 | 10.7 | 11.912 h |
| April | 17.9°C7.0°C | 7.0°C | 147 | 11.2 | 13.113 h |
| May | 22.4°C12.3°C | 12.3°C | 176 | 11.9 | 14.014 h |
| June | 25.6°C17.4°C | 17.4°C | 222 | 15.1 | 14.514 h |
| July | 29.0°C21.7°C | 21.7°C | 276 | 18.4 | 14.314 h |
| August | 30.3°C22.8°C | 22.8°C | 181 | 15.4 | 13.513 h |
| September, selected | 26.7°C19.1°C | 19.1°C | 248 | 14.0 | 12.412 h |
| October | 21.2°C12.7°C | 12.7°C | 192 | 11.3 | 11.311 h |
| November | 15.5°C6.5°C | 6.5°C | 99 | 7.6 | 10.310 h |
| December | 10.1°C1.3°C | 1.3°C | 65 | 6.8 | 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
- Komaki in SeptemberJapan · 11 kmHigh 26.9°C · Low 19.0°C · 186 mm rain
- Ama in SeptemberJapan · 13 kmHigh 27.0°C · Low 19.6°C · 248 mm rain
- Gifu in SeptemberJapan · 14 kmHigh 26.4°C · Low 18.6°C · 291 mm rain
- Kakamigahara in SeptemberJapan · 14 kmHigh 26.4°C · Low 18.4°C · 291 mm rain
- Nagoya in SeptemberJapan · 16 kmHigh 27.1°C · Low 19.5°C · 186 mm rain
- Kasugai in SeptemberJapan · 17 kmHigh 27.3°C · Low 19.6°C · 186 mm rain
- Ōgaki in SeptemberJapan · 18 kmHigh 26.6°C · Low 19.3°C · 246 mm rain
- Sekimachi in SeptemberJapan · 23 kmHigh 26.6°C · Low 18.7°C · 216 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 Ichinomiya) is explained once on the Ichinomiya year overview and on the Sources, method and limits page.
Ama lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.