Climate averages 1991–2020
Izumo weather
in August.
A hot, wet month: the warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Izumo: daytime highs average 28.7°C and nights cool to about 24.6°C. By daytime temperature it is the warmest month of the year.
Expect about 149 mm of rain on roughly 14 days, which makes August a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 29 min on an average August day.
The nearest other city in this atlas is Matsue (29 km away). In August its highs average 28.1°C, 0.6°C cooler than Izumo, with 123 mm of rain.
Among the 303 cities listed in Japan, Izumo ranks joint 213th of 303 for the warmest August highs and joint 159th of 303 for the driest August (rainfall, lowest first). The mean August high of those 303 cities is 29.2°C; Izumo is 0.4°C cooler than that mean.
From August to September, average highs fall by 3.7°C to 25.0°C, and monthly rainfall rises from 149 mm to 190 mm.
The annual picture
August 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
Izumo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.5°C3.5°C | 3.5°C | 96 | 17.3 | 10.110 h |
| February | 8.2°C3.4°C | 3.4°C | 89 | 14.7 | 10.911 h |
| March | 11.3°C5.6°C | 5.6°C | 116 | 14.1 | 11.912 h |
| April | 16.0°C9.7°C | 9.7°C | 104 | 10.7 | 13.113 h |
| May | 20.3°C14.3°C | 14.3°C | 117 | 10.5 | 14.014 h |
| June | 23.7°C18.7°C | 18.7°C | 160 | 12.7 | 14.515 h |
| July | 27.2°C23.2°C | 23.2°C | 213 | 15.2 | 14.314 h |
| August, selected | 28.7°C24.6°C | 24.6°C | 149 | 13.8 | 13.513 h |
| September | 25.0°C20.9°C | 20.9°C | 190 | 13.6 | 12.412 h |
| October | 20.2°C15.8°C | 15.8°C | 103 | 10.3 | 11.311 h |
| November | 15.3°C10.7°C | 10.7°C | 87 | 11.1 | 10.310 h |
| December | 10.2°C6.0°C | 6.0°C | 103 | 16.3 | 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
August in nearby cities
- Matsue in AugustJapan · 29 kmHigh 28.1°C · Low 24.9°C · 123 mm rain
- Yonago in AugustJapan · 52 kmHigh 28.9°C · Low 24.0°C · 116 mm rain
- Higashihiroshima in AugustJapan · 107 kmHigh 29.6°C · Low 23.1°C · 132 mm rain
- Mihara in AugustJapan · 111 kmHigh 30.9°C · Low 24.3°C · 125 mm rain
- Hiroshima in AugustJapan · 111 kmHigh 30.4°C · Low 23.8°C · 157 mm rain
- Fukuyama in AugustJapan · 112 kmHigh 31.0°C · Low 24.4°C · 107 mm rain
- Onomichi in AugustJapan · 113 kmHigh 30.5°C · Low 24.0°C · 107 mm rain
- Tsuyama in AugustJapan · 117 kmHigh 30.7°C · Low 23.2°C · 140 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 Izumo) is explained once on the Izumo year overview and on the Sources, method and limits page.