Click on a day for an hourly weather forecast
The temperatures in Hakodate in September are comfortable with low of 17°C and and high up to 21°C.
You can expect about 3 to 8 days of rain in Hakodate 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 Hakodate in September 2025.
If you’re planning to visit Hakodate in the near future, we highly recommend that you review the 14 day weather forecast for Hakodate before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 0° / -3° | 7 | 3 | 22 | 54 mm | Awful | Hakodate in January |
| February | 0° / -3° | 7 | 3 | 20 | 54 mm | Awful | Hakodate in February |
| March | 4° / 0° | 9 | 8 | 14 | 62 mm | Awful | Hakodate in March |
| April | 9° / 4° | 6 | 21 | 3 | 53 mm | Bad | Hakodate in April |
| May | 13° / 9° | 6 | 25 | 0 | 65 mm | Ok | Hakodate in May |
| June | 17° / 13° | 5 | 25 | 0 | 71 mm | Good | Hakodate in June |
| July | 21° / 18° | 6 | 25 | 0 | 100 mm | Good | Hakodate in July |
| August | 23° / 20° | 7 | 24 | 0 | 118 mm | Good | Hakodate in August |
| September | 21° / 17° | 6 | 24 | 0 | 89 mm | Good | Hakodate in September |
| October | 15° / 11° | 5 | 26 | 0 | 77 mm | Good | Hakodate in October |
| November | 9° / 5° | 8 | 16 | 5 | 81 mm | Awful | Hakodate in November |
| December | 3° / -1° | 10 | 5 | 17 | 72 mm | Awful | Hakodate in December |