Climate averages 1991–2020
Ishioka 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 Ishioka: daytime highs average 25.8°C and nights cool to about 20.0°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 174 mm of rain on roughly 15 days, which makes September a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 27 min on an average September day.
The nearest other city in this atlas is Tsuchiura (11 km away). In September its highs average 26.1°C, about as warm as Ishioka, with 168 mm of rain.
Among the 303 cities listed in Japan, Ishioka ranks joint 176th of 303 for the warmest September highs and joint 89th of 303 for the driest September (rainfall, lowest first). The mean September high of those 303 cities is 25.7°C; Ishioka is 0.1°C warmer than that mean.
From September to October, average highs fall by 5.3°C to 20.5°C, and monthly rainfall rises from 174 mm to 191 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
Ishioka 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-0.1°C | -0.1°C | 61 | 6.7 | 10.010 h |
| February | 8.9°C0.4°C | 0.4°C | 62 | 7.4 | 10.811 h |
| March | 12.3°C3.4°C | 3.4°C | 110 | 12.4 | 11.912 h |
| April | 17.4°C8.4°C | 8.4°C | 114 | 11.9 | 13.113 h |
| May | 21.8°C13.5°C | 13.5°C | 140 | 12.5 | 14.114 h |
| June | 24.4°C17.6°C | 17.6°C | 152 | 14.9 | 14.615 h |
| July | 28.1°C21.6°C | 21.6°C | 171 | 16.1 | 14.414 h |
| August | 29.5°C23.1°C | 23.1°C | 127 | 13.6 | 13.514 h |
| September, selected | 25.8°C20.0°C | 20.0°C | 174 | 14.5 | 12.412 h |
| October | 20.5°C14.4°C | 14.4°C | 191 | 12.4 | 11.311 h |
| November | 15.5°C8.2°C | 8.2°C | 91 | 9.5 | 10.310 h |
| December | 10.3°C2.5°C | 2.5°C | 60 | 7.4 | 9.710 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
- Tsuchiura in SeptemberJapan · 11 kmHigh 26.1°C · Low 20.0°C · 168 mm rain
- Tsukuba in SeptemberJapan · 17 kmHigh 26.1°C · Low 19.7°C · 167 mm rain
- Kasama, Japan in SeptemberJapan · 22 kmHigh 24.6°C · Low 18.5°C · 174 mm rain
- Mito in SeptemberJapan · 25 kmHigh 25.1°C · Low 19.6°C · 176 mm rain
- Ushiku in SeptemberJapan · 27 kmHigh 26.2°C · Low 19.8°C · 168 mm rain
- Chikusei in SeptemberJapan · 29 kmHigh 26.1°C · Low 19.1°C · 164 mm rain
- Ryūgasaki in SeptemberJapan · 32 kmHigh 26.3°C · Low 20.1°C · 168 mm rain
- Hitachi-Naka in SeptemberJapan · 34 kmHigh 24.6°C · Low 19.9°C · 179 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 Ishioka) is explained once on the Ishioka year overview and on the Sources, method and limits page.