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The temperatures in Kouvola in May are quite cold with temperatures between 6°C and 15°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Kouvola during the month of May. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Please note that Kouvola can expect a few days of snow in May.
Our weather forecast can give you a great sense of what weather to expect in Kouvola in May 2026.
If you’re planning to visit Kouvola in the near future, we highly recommend that you review the 14 day weather forecast for Kouvola before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -4° / -9° | 4 | 4 | 24 | 76 mm | Awful | Kouvola in January |
| February | -4° / -9° | 4 | 3 | 22 | 71 mm | Awful | Kouvola in February |
| March | 0° / -6° | 6 | 5 | 21 | 65 mm | Awful | Kouvola in March |
| April | 6° / 0° | 7 | 13 | 10 | 54 mm | Awful | Kouvola in April |
| May | 15° / 6° | 7 | 23 | 2 | 68 mm | Bad | Kouvola in May |
| June | 19° / 10° | 6 | 24 | 0 | 82 mm | Good | Kouvola in June |
| July | 22° / 13° | 6 | 25 | 0 | 98 mm | Good | Kouvola in July |
| August | 20° / 12° | 6 | 25 | 0 | 89 mm | Good | Kouvola in August |
| September | 15° / 8° | 5 | 25 | 0 | 77 mm | Good | Kouvola in September |
| October | 7° / 3° | 8 | 18 | 5 | 78 mm | Awful | Kouvola in October |
| November | 3° / 0° | 8 | 12 | 11 | 81 mm | Awful | Kouvola in November |
| December | -2° / -5° | 8 | 3 | 22 | 87 mm | Awful | Kouvola in December |