Climate averages 1991–2020
Anan 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 Anan: daytime highs average 25.9°C and nights cool to about 22.4°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 220 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 25 min on an average September day.
The nearest other city in this atlas is Tokushima (18 km away). In September its highs average 26.3°C, about as warm as Anan, with 286 mm of rain.
Among the 303 cities listed in Japan, Anan ranks joint 168th of 303 for the warmest September highs and 238th of 303 for the driest September (rainfall, lowest first). The mean September high of those 303 cities is 25.7°C; Anan is 0.3°C warmer than that mean.
From September to October, average highs fall by 4.5°C to 21.5°C, and monthly rainfall falls from 220 mm to 212 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
Anan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.8°C5.3°C | 5.3°C | 78 | 9.4 | 10.210 h |
| February | 10.5°C5.4°C | 5.4°C | 85 | 10.4 | 10.911 h |
| March | 13.4°C7.7°C | 7.7°C | 128 | 11.7 | 12.012 h |
| April | 17.5°C12.0°C | 12.0°C | 137 | 10.6 | 13.013 h |
| May | 21.0°C16.3°C | 16.3°C | 165 | 10.6 | 13.914 h |
| June | 23.9°C20.1°C | 20.1°C | 243 | 13.8 | 14.414 h |
| July | 27.5°C24.0°C | 24.0°C | 187 | 11.8 | 14.214 h |
| August | 28.7°C25.2°C | 25.2°C | 113 | 9.4 | 13.413 h |
| September, selected | 25.9°C22.4°C | 22.4°C | 220 | 13.5 | 12.412 h |
| October | 21.5°C17.6°C | 17.6°C | 212 | 11.2 | 11.411 h |
| November | 16.9°C12.4°C | 12.4°C | 104 | 8.6 | 10.410 h |
| December | 12.1°C7.6°C | 7.6°C | 84 | 8.0 | 9.910 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
- Tokushima in SeptemberJapan · 18 kmHigh 26.3°C · Low 21.5°C · 286 mm rain
- Minato in SeptemberJapan · 57 kmHigh 26.5°C · Low 21.0°C · 181 mm rain
- Tanabe in SeptemberJapan · 69 kmHigh 27.1°C · Low 22.2°C · 215 mm rain
- Takamatsu in SeptemberJapan · 72 kmHigh 26.0°C · Low 21.3°C · 184 mm rain
- Izumisano in SeptemberJapan · 83 kmHigh 27.8°C · Low 20.4°C · 176 mm rain
- Akashi in SeptemberJapan · 88 kmHigh 26.4°C · Low 21.2°C · 194 mm rain
- Marugame in SeptemberJapan · 90 kmHigh 25.9°C · Low 21.1°C · 168 mm rain
- Kishiwada in SeptemberJapan · 90 kmHigh 27.0°C · Low 19.7°C · 176 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 Anan) is explained once on the Anan year overview and on the Sources, method and limits page.