Climate averages 1991–2020
Yamagata weather
in August.
A warm, wet month: the warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Yamagata: daytime highs average 26.9°C and nights cool to about 19.5°C. By daytime temperature it is the warmest month of the year.
Expect about 146 mm of rain on roughly 15 days, which makes August a wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 39 min on an average August day.
The nearest other city in this atlas is Yonezawa (42 km away). In August its highs average 27.7°C, 0.8°C warmer than Yamagata, with 183 mm of rain.
Among the 303 cities listed in Japan, Yamagata ranks joint 277th of 303 for the warmest August highs and joint 149th of 303 for the driest August (rainfall, lowest first). The mean August high of those 303 cities is 29.2°C; Yamagata is 2.3°C cooler than that mean.
From August to September, average highs fall by 4.1°C to 22.8°C, and monthly rainfall falls from 146 mm to 125 mm.
The annual picture
August in context
Monthly precipitation
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
Yamagata climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 0.8°C-6.4°C | -6.4°C | 126 | 21.8 | 9.810 h |
| February | 1.8°C-6.0°C | -6.0°C | 91 | 18.1 | 10.711 h |
| March | 5.6°C-3.1°C | -3.1°C | 109 | 16.9 | 11.912 h |
| April | 12.8°C2.0°C | 2.0°C | 94 | 13.7 | 13.213 h |
| May | 19.2°C8.4°C | 8.4°C | 91 | 11.9 | 14.214 h |
| June | 22.6°C13.8°C | 13.8°C | 119 | 12.5 | 14.815 h |
| July | 25.7°C18.4°C | 18.4°C | 189 | 17.4 | 14.515 h |
| August, selected | 26.9°C19.5°C | 19.5°C | 146 | 14.8 | 13.614 h |
| September | 22.8°C15.5°C | 15.5°C | 125 | 13.0 | 12.512 h |
| October | 16.9°C8.7°C | 8.7°C | 118 | 12.4 | 11.211 h |
| November | 10.6°C2.2°C | 2.2°C | 95 | 15.3 | 10.110 h |
| December | 3.9°C-3.0°C | -3.0°C | 120 | 20.0 | 9.610 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet 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
- Yonezawa in AugustJapan · 42 kmHigh 27.7°C · Low 20.6°C · 183 mm rain
- Sendai in AugustJapan · 44 kmHigh 26.2°C · Low 21.0°C · 169 mm rain
- Natori-shi in AugustJapan · 46 kmHigh 26.0°C · Low 21.4°C · 162 mm rain
- Fukushima in AugustJapan · 54 kmHigh 27.9°C · Low 20.7°C · 163 mm rain
- Ōsaki in AugustJapan · 66 kmHigh 27.2°C · Low 20.4°C · 165 mm rain
- Tsuruoka in AugustJapan · 72 kmHigh 27.3°C · Low 22.0°C · 203 mm rain
- Ishinomaki in AugustJapan · 84 kmHigh 25.6°C · Low 21.8°C · 131 mm rain
- Tome in AugustJapan · 87 kmHigh 27.1°C · Low 20.5°C · 135 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 Yamagata) is explained once on the Yamagata year overview and on the Sources, method and limits page.