Climate averages 1991–2020
Yokosuka weather
in August.
A warm, wet month: the warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Yokosuka: daytime highs average 27.4°C and nights cool to about 24.3°C. By daytime temperature it is the warmest month of the year.
Expect about 107 mm of rain on roughly 10 days, which makes August a wet month (the 4th 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 Yokohama (17 km away). In August its highs average 27.7°C, about as warm as Yokosuka, with 102 mm of rain.
Among the 303 cities listed in Japan, Yokosuka ranks joint 266th of 303 for the warmest August highs and joint 20th of 303 for the driest August (rainfall, lowest first). The mean August high of those 303 cities is 29.2°C; Yokosuka is 1.8°C cooler than that mean.
From August to September, average highs fall by 2.3°C to 25.1°C, and monthly rainfall rises from 107 mm to 185 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
Yokosuka climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.2°C4.3°C | 4.3°C | 81 | 7.4 | 10.110 h |
| February | 9.6°C4.3°C | 4.3°C | 84 | 8.6 | 10.911 h |
| March | 12.3°C6.9°C | 6.9°C | 144 | 13.0 | 11.912 h |
| April | 16.1°C11.3°C | 11.3°C | 126 | 11.6 | 13.113 h |
| May | 19.8°C15.7°C | 15.7°C | 138 | 10.9 | 14.014 h |
| June | 22.6°C19.2°C | 19.2°C | 182 | 12.9 | 14.514 h |
| July | 25.8°C22.8°C | 22.8°C | 147 | 11.5 | 14.314 h |
| August, selected | 27.4°C24.3°C | 24.3°C | 107 | 9.8 | 13.513 h |
| September | 25.1°C21.7°C | 21.7°C | 185 | 13.2 | 12.412 h |
| October | 20.6°C16.8°C | 16.8°C | 222 | 12.7 | 11.311 h |
| November | 16.2°C11.8°C | 11.8°C | 115 | 10.7 | 10.310 h |
| December | 11.7°C7.0°C | 7.0°C | 73 | 8.5 | 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
- Yokohama in AugustJapan · 17 kmHigh 27.7°C · Low 23.8°C · 102 mm rain
- Fujisawa in AugustJapan · 19 kmHigh 27.4°C · Low 23.8°C · 125 mm rain
- Chigasaki in AugustJapan · 25 kmHigh 27.5°C · Low 23.7°C · 125 mm rain
- Kisarazu in AugustJapan · 26 kmHigh 29.0°C · Low 24.1°C · 118 mm rain
- Kawasaki in AugustJapan · 27 kmHigh 29.0°C · Low 24.1°C · 102 mm rain
- Hiratsuka in AugustJapan · 30 kmHigh 27.5°C · Low 23.4°C · 154 mm rain
- Minamirinkan in AugustJapan · 31 kmHigh 28.0°C · Low 22.7°C · 125 mm rain
- Ōta in AugustJapan · 31 kmHigh 29.2°C · Low 23.8°C · 102 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 Yokosuka) is explained once on the Yokosuka year overview and on the Sources, method and limits page.