Climate averages 1991–2020
Yokohama weather
in August.
A warm, wet month: the warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Yokohama: daytime highs average 27.7°C and nights cool to about 23.8°C. By daytime temperature it is the warmest month of the year.
Expect about 102 mm of rain on roughly 11 days, which makes August a wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 30 min on an average August day.
The nearest other city in this atlas is Kawasaki (11 km away). In August its highs average 29.0°C, 1.3°C warmer than Yokohama, with 102 mm of rain.
Among the 303 cities listed in Japan, Yokohama ranks joint 259th of 303 for the warmest August highs and joint 12th of 303 for the driest August (rainfall, lowest first). The mean August high of those 303 cities is 29.2°C; Yokohama is 1.4°C cooler than that mean.
From August to September, average highs fall by 2.7°C to 25.0°C, and monthly rainfall rises from 102 mm to 175 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
Yokohama climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.6°C2.6°C | 2.6°C | 72 | 6.9 | 10.110 h |
| February | 9.2°C2.7°C | 2.7°C | 71 | 7.9 | 10.911 h |
| March | 12.0°C5.6°C | 5.6°C | 127 | 12.2 | 11.912 h |
| April | 16.2°C10.1°C | 10.1°C | 115 | 11.8 | 13.113 h |
| May | 20.1°C14.9°C | 14.9°C | 128 | 11.1 | 14.014 h |
| June | 22.8°C18.6°C | 18.6°C | 164 | 12.7 | 14.515 h |
| July | 26.3°C22.4°C | 22.4°C | 141 | 12.1 | 14.314 h |
| August, selected | 27.7°C23.8°C | 23.8°C | 102 | 10.6 | 13.513 h |
| September | 25.0°C20.9°C | 20.9°C | 175 | 13.4 | 12.412 h |
| October | 20.2°C15.7°C | 15.7°C | 210 | 12.8 | 11.311 h |
| November | 15.6°C10.4°C | 10.4°C | 97 | 10.0 | 10.310 h |
| December | 11.0°C5.4°C | 5.4°C | 63 | 7.4 | 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
- Kawasaki in AugustJapan · 11 kmHigh 29.0°C · Low 24.1°C · 102 mm rain
- Ōta in AugustJapan · 15 kmHigh 29.2°C · Low 23.8°C · 102 mm rain
- Yokosuka in AugustJapan · 17 kmHigh 27.4°C · Low 24.3°C · 107 mm rain
- Fujisawa in AugustJapan · 18 kmHigh 27.4°C · Low 23.8°C · 125 mm rain
- Minamirinkan in AugustJapan · 20 kmHigh 28.0°C · Low 22.7°C · 125 mm rain
- Machida in AugustJapan · 22 kmHigh 27.6°C · Low 22.7°C · 125 mm rain
- Komae in AugustJapan · 23 kmHigh 28.9°C · Low 23.5°C · 142 mm rain
- Chigasaki in AugustJapan · 25 kmHigh 27.5°C · Low 23.7°C · 125 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 Yokohama) is explained once on the Yokohama year overview and on the Sources, method and limits page.
Kawasaki and Ōta lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.