Click on a day for an hourly weather forecast
The temperatures in Joensuu in August are usually low and can range between 11°C and 19°C.
You can expect about 3 to 8 days of rain in Joensuu during the month of August. 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 Joensuu in August 2025.
If you’re planning to visit Joensuu in the near future, we highly recommend that you review the 14 day weather forecast for Joensuu before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -7° / -11° | 2 | 4 | 25 | 61 mm | Awful | Joensuu in January |
| February | -6° / -11° | 2 | 3 | 24 | 60 mm | Awful | Joensuu in February |
| March | -2° / -7° | 4 | 4 | 23 | 61 mm | Awful | Joensuu in March |
| April | 4° / -1° | 6 | 10 | 15 | 55 mm | Awful | Joensuu in April |
| May | 13° / 5° | 7 | 22 | 3 | 74 mm | Awful | Joensuu in May |
| June | 18° / 9° | 6 | 23 | 0 | 95 mm | Good | Joensuu in June |
| July | 21° / 13° | 8 | 23 | 0 | 125 mm | Ok | Joensuu in July |
| August | 19° / 11° | 7 | 24 | 0 | 122 mm | Ok | Joensuu in August |
| September | 13° / 7° | 7 | 22 | 1 | 102 mm | Bad | Joensuu in September |
| October | 6° / 2° | 8 | 15 | 8 | 83 mm | Awful | Joensuu in October |
| November | 1° / -2° | 8 | 7 | 16 | 82 mm | Awful | Joensuu in November |
| December | -4° / -7° | 4 | 3 | 25 | 70 mm | Awful | Joensuu in December |