Click on a day for an hourly weather forecast
The weather in Yokohama in September is very hot. The average temperatures are between 23°C and 27°C, drinking water regularly is advisable.
You can expect about 3 to 8 days of rain in Yokohama during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Yokohama in September 2025.
If you’re planning to visit Yokohama in the near future, we highly recommend that you review the 14 day weather forecast for Yokohama before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 10° / 5° | 4 | 24 | 2 | 42 mm | Bad | Yokohama in January |
| February | 11° / 5° | 6 | 20 | 2 | 60 mm | Bad | Yokohama in February |
| March | 14° / 8° | 7 | 24 | 1 | 96 mm | Ok | Yokohama in March |
| April | 18° / 12° | 6 | 24 | 0 | 106 mm | Good | Yokohama in April |
| May | 22° / 17° | 6 | 25 | 0 | 91 mm | Good | Yokohama in May |
| June | 25° / 20° | 7 | 23 | 0 | 126 mm | Good | Yokohama in June |
| July | 29° / 24° | 6 | 25 | 0 | 114 mm | Good | Yokohama in July |
| August | 31° / 26° | 5 | 26 | 0 | 96 mm | Good | Yokohama in August |
| September | 27° / 23° | 7 | 23 | 0 | 137 mm | Good | Yokohama in September |
| October | 22° / 18° | 6 | 25 | 0 | 138 mm | Good | Yokohama in October |
| November | 18° / 13° | 4 | 26 | 0 | 58 mm | Good | Yokohama in November |
| December | 13° / 8° | 3 | 27 | 0 | 48 mm | Ok | Yokohama in December |