SeasonMapLondon vs Mariehamn: which is better, month by month
London beats Mariehamn in all 12 months — its lead peaks in December (56 vs 24).
Each place is scored under the lens that suits its type — they are different kinds of destination, so the scores are each place at its own best. Comfort is SeasonMap's 0–100 estimate from ERA5 climate normals, not a forecast.
London vs Mariehamn — all 12 months
| Month | London | Mariehamn | Winner | Gap |
|---|---|---|---|---|
| January | 54Dcold, a little rain, clean air | 27Ffreezing, a little rain, clean air | London | 27 |
| February | 63Ccold, a little rain, clean air | 37Ffreezing, a little rain, clean air | London | 26 |
| March | 69Ccold, a little rain, clean air | 51Dfreezing, a little rain, clean air | London | 18 |
| April | 79Bcool, a little rain, clean air | 63Ccold, a little rain, clean air | London | 16 |
| May | 86Anice, a little rain, clean air | 76Bcool, dry, clean air | London | 10 |
| June | 91Snice, a little rain, clean air | 82Anice, a little rain, clean air | London | 9 |
| July | 94Swarm, a little rain, clean air | 87Anice, a little rain, clean air | London | 7 |
| August | 93Snice, a little rain, clean air | 80Anice, a little rain, clean air | London | 13 |
| September | 84Anice, a little rain, clean air | 73Bcool, a little rain, clean air | London | 11 |
| October | 73Bcool, a little rain, clean air | 49Fcold, rainy, clean air | London | 24 |
| November | 61Ccold, a little rain, clean air | 34Fcold, a little rain, clean air | London | 27 |
| December | 56Dcold, a little rain, clean air | 24Ffreezing, a little rain, clean air | London | 32 |
A month is a tie when the two are within 3 points. The widest gap is December (56 vs 24). Tap a month for that month's temperature, rain, humidity and air quality side by side.