SeasonMapHelsinki vs London: which is better, month by month
London beats Helsinki in 10 of 12 months — its lead peaks in February (63 vs 38) — and they are within 3 points in June to July.
Each place is scored under the lens that suits its type. Comfort is SeasonMap's 0–100 estimate from ERA5 climate normals, not a forecast.
Helsinki vs London — all 12 months
| Month | Helsinki | London | Winner | Gap |
|---|---|---|---|---|
| January | 30Ffreezing, a little rain, clean air | 54Dcold, a little rain, clean air | London | 24 |
| February | 38Ffreezing, a little rain, clean air | 63Ccold, a little rain, clean air | London | 25 |
| March | 52Dfreezing, a little rain, clean air | 69Ccold, a little rain, clean air | London | 17 |
| April | 70Bcold, a little rain, muggy air | 79Bcool, a little rain, clean air | London | 9 |
| May | 81Acool, a little rain, clean air | 86Anice, a little rain, clean air | London | 5 |
| June | 90Snice, a little rain, clean air | 91Snice, a little rain, clean air | Tie | 1 |
| July | 93Snice, a little rain, clean air | 94Swarm, a little rain, clean air | Tie | 1 |
| August | 87Anice, rainy, clean air | 93Snice, a little rain, clean air | London | 6 |
| September | 77Bcool, a little rain, clean air | 84Anice, a little rain, clean air | London | 7 |
| October | 61Ccold, a little rain, clean air | 73Bcool, a little rain, clean air | London | 12 |
| November | 45Fcold, a little rain, clean air | 61Ccold, a little rain, clean air | London | 16 |
| December | 34Ffreezing, a little rain, clean air | 56Dcold, a little rain, clean air | London | 22 |
A month is a tie when the two are within 3 points. The widest gap is February (38 vs 63). Tap a month for that month's temperature, rain, humidity and air quality side by side.