Climate averages 1991–2020
Komaki 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 Komaki: daytime highs average 26.9°C and nights cool to about 19.0°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 186 mm of rain on roughly 12 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 Kasugai (6 km away). In September its highs average 27.3°C, about as warm as Komaki, with 186 mm of rain.
Among the 303 cities listed in Japan, Komaki ranks joint 67th of 303 for the warmest September highs and joint 142nd of 303 for the driest September (rainfall, lowest first). The mean September high of those 303 cities is 25.7°C; Komaki is 1.2°C warmer than that mean.
From September to October, average highs fall by 5.5°C to 21.3°C, and monthly rainfall falls from 186 mm to 171 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
Komaki climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.9°C-1.4°C | -1.4°C | 54 | 5.7 | 10.110 h |
| February | 9.0°C-1.1°C | -1.1°C | 61 | 6.6 | 10.911 h |
| March | 12.9°C1.7°C | 1.7°C | 110 | 10.1 | 11.912 h |
| April | 18.0°C6.8°C | 6.8°C | 123 | 10.6 | 13.113 h |
| May | 22.5°C12.2°C | 12.2°C | 144 | 10.6 | 14.014 h |
| June | 25.7°C17.4°C | 17.4°C | 178 | 14.3 | 14.514 h |
| July | 29.0°C21.7°C | 21.7°C | 190 | 14.9 | 14.314 h |
| August | 30.5°C22.8°C | 22.8°C | 111 | 11.7 | 13.513 h |
| September, selected | 26.9°C19.0°C | 19.0°C | 186 | 12.1 | 12.412 h |
| October | 21.3°C12.5°C | 12.5°C | 171 | 10.3 | 11.311 h |
| November | 15.6°C6.1°C | 6.1°C | 85 | 7.2 | 10.310 h |
| December | 10.2°C0.9°C | 0.9°C | 55 | 6.0 | 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
- Kasugai in SeptemberJapan · 6 kmHigh 27.3°C · Low 19.6°C · 186 mm rain
- Ichinomiya in SeptemberJapan · 11 kmHigh 26.7°C · Low 19.1°C · 248 mm rain
- Nagoya in SeptemberJapan · 11 kmHigh 27.1°C · Low 19.5°C · 186 mm rain
- Ama in SeptemberJapan · 15 kmHigh 27.0°C · Low 19.6°C · 248 mm rain
- Kakamigahara in SeptemberJapan · 16 kmHigh 26.4°C · Low 18.4°C · 291 mm rain
- Seto in SeptemberJapan · 18 kmHigh 26.9°C · Low 19.2°C · 186 mm rain
- Kani in SeptemberJapan · 18 kmHigh 26.5°C · Low 18.5°C · 216 mm rain
- Tajimi in SeptemberJapan · 20 kmHigh 26.6°C · Low 18.8°C · 232 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 Komaki) is explained once on the Komaki year overview and on the Sources, method and limits page.
Nagoya, Kasugai and Seto lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.