Climate averages 1991–2020
Matsuyama 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 Matsuyama: daytime highs average 30.7°C and nights cool to about 24.9°C. By daytime temperature it is the warmest month of the year.
Expect about 156 mm of rain on roughly 16 days, which makes August a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 25 min on an average August day.
The nearest other city in this atlas is Shinagawa (32 km away). In August its highs average 29.7°C, 0.9°C cooler than Matsuyama, with 194 mm of rain.
Among the 303 cities listed in Japan, Matsuyama ranks joint 38th of 303 for the warmest August highs and joint 175th of 303 for the driest August (rainfall, lowest first). The mean August high of those 303 cities is 29.2°C; Matsuyama is 1.5°C warmer than that mean.
From August to September, average highs fall by 3.4°C to 27.3°C, and monthly rainfall rises from 156 mm to 187 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
Matsuyama climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.8°C3.1°C | 3.1°C | 69 | 11.4 | 10.210 h |
| February | 10.0°C3.2°C | 3.2°C | 82 | 10.6 | 10.911 h |
| March | 13.6°C5.7°C | 5.7°C | 118 | 12.3 | 12.012 h |
| April | 18.7°C10.3°C | 10.3°C | 133 | 11.0 | 13.013 h |
| May | 23.1°C15.2°C | 15.2°C | 154 | 11.1 | 13.914 h |
| June | 26.1°C19.7°C | 19.7°C | 268 | 15.7 | 14.414 h |
| July | 29.7°C24.0°C | 24.0°C | 239 | 16.8 | 14.214 h |
| August, selected | 30.7°C24.9°C | 24.9°C | 156 | 15.8 | 13.413 h |
| September | 27.3°C21.5°C | 21.5°C | 187 | 13.6 | 12.412 h |
| October | 22.1°C16.0°C | 16.0°C | 141 | 9.4 | 11.411 h |
| November | 16.8°C10.5°C | 10.5°C | 83 | 9.1 | 10.410 h |
| December | 11.3°C5.4°C | 5.4°C | 83 | 11.4 | 10.010 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
- Shinagawa in AugustJapan · 32 kmHigh 29.7°C · Low 23.3°C · 194 mm rain
- Imabari in AugustJapan · 34 kmHigh 29.7°C · Low 25.0°C · 142 mm rain
- Saijō in AugustJapan · 40 kmHigh 31.3°C · Low 25.2°C · 151 mm rain
- Kure in AugustJapan · 47 kmHigh 28.4°C · Low 24.2°C · 120 mm rain
- Niihama in AugustJapan · 52 kmHigh 30.6°C · Low 24.8°C · 151 mm rain
- Iwakuni in AugustJapan · 62 kmHigh 29.8°C · Low 24.4°C · 169 mm rain
- Higashihiroshima in AugustJapan · 63 kmHigh 29.6°C · Low 23.1°C · 132 mm rain
- Hiroshima in AugustJapan · 69 kmHigh 30.4°C · Low 23.8°C · 157 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 Matsuyama) is explained once on the Matsuyama year overview and on the Sources, method and limits page.