Click on a day for an hourly weather forecast
The temperatures in Vaasa in August are usually low and can range between 13°C and 18°C.
You can expect rain for roughly half of the month of August in Vaasa. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Vaasa in August 2025.
If you’re planning to visit Vaasa in the near future, we highly recommend that you review the 14 day weather forecast for Vaasa before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -3° / -6° | 5 | 7 | 20 | 67 mm | Awful | Vaasa in January |
| February | -3° / -7° | 5 | 5 | 19 | 62 mm | Awful | Vaasa in February |
| March | 0° / -5° | 6 | 8 | 17 | 61 mm | Awful | Vaasa in March |
| April | 4° / 0° | 6 | 16 | 9 | 63 mm | Awful | Vaasa in April |
| May | 10° / 5° | 7 | 22 | 2 | 84 mm | Awful | Vaasa in May |
| June | 14° / 9° | 6 | 24 | 0 | 92 mm | Good | Vaasa in June |
| July | 18° / 13° | 7 | 24 | 0 | 112 mm | Ok | Vaasa in July |
| August | 18° / 13° | 9 | 22 | 0 | 135 mm | Ok | Vaasa in August |
| September | 14° / 10° | 7 | 23 | 0 | 91 mm | Ok | Vaasa in September |
| October | 7° / 5° | 9 | 18 | 5 | 107 mm | Awful | Vaasa in October |
| November | 4° / 2° | 10 | 12 | 9 | 91 mm | Awful | Vaasa in November |
| December | 0° / -3° | 8 | 5 | 18 | 81 mm | Awful | Vaasa in December |