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The weather in Mariehamn in January is very cold with temperatures between -1°C and 1°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Mariehamn during the month of January. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Let it snow! You can expect Mariehamn to be covered in white during the month of January. Be sure to bundle up when you venture outside, or take the opportunity to enjoy hot cocoa by the fire for warmth this month.
Our weather forecast can give you a great sense of what weather to expect in Mariehamn in January 2025.
If you’re planning to visit Mariehamn in the near future, we highly recommend that you review the 14 day weather forecast for Mariehamn before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 1° / -1° | 4 | 13 | 15 | 49 mm | Awful | Mariehamn in January |
| February | 0° / -2° | 3 | 12 | 14 | 34 mm | Awful | Mariehamn in February |
| March | 1° / -1° | 5 | 16 | 11 | 33 mm | Awful | Mariehamn in March |
| April | 4° / 2° | 3 | 23 | 4 | 28 mm | Awful | Mariehamn in April |
| May | 8° / 6° | 4 | 26 | 1 | 44 mm | Ok | Mariehamn in May |
| June | 13° / 11° | 4 | 26 | 0 | 51 mm | Ok | Mariehamn in June |
| July | 17° / 15° | 4 | 27 | 0 | 63 mm | Good | Mariehamn in July |
| August | 18° / 16° | 5 | 26 | 0 | 86 mm | Good | Mariehamn in August |
| September | 14° / 13° | 4 | 26 | 0 | 69 mm | Good | Mariehamn in September |
| October | 9° / 8° | 7 | 24 | 0 | 70 mm | Bad | Mariehamn in October |
| November | 6° / 5° | 7 | 20 | 3 | 60 mm | Awful | Mariehamn in November |
| December | 3° / 1° | 6 | 14 | 10 | 60 mm | Awful | Mariehamn in December |