SeasonMapCologne vs Heidelberg: which is better, month by month
Cologne beats Heidelberg in 2 of 12 months — its lead peaks in July (90 vs 85) — while Heidelberg wins September; they are within 3 points in the other 9 months.
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.
Cologne vs Heidelberg — all 12 months
| Month | Cologne | Heidelberg | Winner | Gap |
|---|---|---|---|---|
| January | 48Fcold, rainy, clean air | 48Fcold, a little rain, clean air | Tie | 0 |
| February | 58Dcold, a little rain, clean air | 61Ccold, a little rain, clean air | Tie | 3 |
| March | 67Ccold, a little rain, clean air | 69Ccool, a little rain, clean air | Tie | 2 |
| April | 78Bcool, a little rain, clean air | 80Acool, a little rain, clean air | Tie | 2 |
| May | 84Anice, a little rain | 86Anice, a little rain, clean air | Tie | 2 |
| June | 93Swarm, a little rain | 89Awarm, a little rain | Cologne | 4 |
| July | 90Swarm, rainy, clean air | 85Awarm, a little rain, clean air | Cologne | 5 |
| August | 89Awarm, a little rain | 87Ahot, a little rain | Tie | 2 |
| September | 85Anice, a little rain, clean air | 91Snice, a little rain, clean air | Heidelberg | 6 |
| October | 71Bcool, a little rain, clean air | 72Bnice, a little rain, clean air | Tie | 1 |
| November | 60Ccold, a little rain, clean air | 59Dcold, a little rain, clean air | Tie | 1 |
| December | 52Dcold, rainy, clean air | 51Dcold, a little rain, clean air | Tie | 1 |
A month is a tie when the two are within 3 points. The widest gap is September (85 vs 91). Tap a month for that month's temperature, rain, humidity and air quality side by side.