Climate averages 1991–2020
Katori-shi weather
in September.
A warm, 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 Katori-shi: daytime highs average 25.8°C and nights cool to about 20.8°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 171 mm of rain on roughly 14 days, which makes September a 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 Kamisu (15 km away). In September its highs average 25.3°C, 0.5°C cooler than Katori-shi, with 174 mm of rain.
Among the 303 cities listed in Japan, Katori-shi ranks joint 176th of 303 for the warmest September highs and joint 79th of 303 for the driest September (rainfall, lowest first). The mean September high of those 303 cities is 25.7°C; Katori-shi is 0.1°C warmer than that mean.
From September to October, average highs fall by 5.0°C to 20.7°C, and monthly rainfall rises from 171 mm to 213 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
Katori-shi climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.5°C1.7°C | 1.7°C | 77 | 8.0 | 10.010 h |
| February | 9.2°C1.9°C | 1.9°C | 74 | 8.6 | 10.911 h |
| March | 12.4°C4.9°C | 4.9°C | 128 | 12.6 | 11.912 h |
| April | 17.1°C9.6°C | 9.6°C | 118 | 12.5 | 13.113 h |
| May | 21.3°C14.4°C | 14.4°C | 136 | 12.0 | 14.014 h |
| June | 24.0°C18.1°C | 18.1°C | 157 | 13.6 | 14.515 h |
| July | 27.7°C22.0°C | 22.0°C | 149 | 13.6 | 14.314 h |
| August | 29.2°C23.5°C | 23.5°C | 103 | 10.7 | 13.514 h |
| September, selected | 25.8°C20.8°C | 20.8°C | 171 | 13.8 | 12.412 h |
| October | 20.7°C15.6°C | 15.6°C | 213 | 13.0 | 11.311 h |
| November | 15.9°C10.0°C | 10.0°C | 107 | 10.7 | 10.310 h |
| December | 11.0°C4.5°C | 4.5°C | 73 | 9.2 | 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
- Kamisu in SeptemberJapan · 15 kmHigh 25.3°C · Low 21.3°C · 174 mm rain
- Narita in SeptemberJapan · 21 kmHigh 26.3°C · Low 20.2°C · 175 mm rain
- Ryūgasaki in SeptemberJapan · 28 kmHigh 26.3°C · Low 20.1°C · 168 mm rain
- Inzai in SeptemberJapan · 31 kmHigh 26.2°C · Low 20.2°C · 175 mm rain
- Sakura in SeptemberJapan · 31 kmHigh 26.2°C · Low 20.6°C · 175 mm rain
- Tsuchiura in SeptemberJapan · 34 kmHigh 26.1°C · Low 20.0°C · 168 mm rain
- Ushiku in SeptemberJapan · 34 kmHigh 26.2°C · Low 19.8°C · 168 mm rain
- Toride in SeptemberJapan · 37 kmHigh 26.3°C · Low 20.0°C · 167 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 Katori-shi) is explained once on the Katori-shi year overview and on the Sources, method and limits page.