SeasonMapSt. Louis vs Washington: which is better, month by month
Washington beats St. Louis in 2 of 12 months — its lead peaks in January (59 vs 50) — while St. Louis 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.
St. Louis vs Washington — all 12 months
| Month | St. Louis | Washington | Winner | Gap |
|---|---|---|---|---|
| January | 50Dcold, a little rain, clean air | 59Dcold, a little rain, clean air | Washington | 9 |
| February | 62Ccold, a little rain, clean air | 63Ccold, a little rain, clean air | Tie | 1 |
| March | 69Ccool, rainy, clean air | 73Bcool, rainy, clean air | Washington | 4 |
| April | 80Anice, rainy, clean air | 83Anice, rainy, clean air | Tie | 3 |
| May | 87Awarm, rainy | 87Awarm, rainy | Tie | 0 |
| June | 76Bsweltering, rainy | 78Bhot, rainy | Tie | 2 |
| July | 66Csweltering, rainy | 65Csweltering, soaked | Tie | 1 |
| August | 73Bsweltering, rainy | 70Bsweltering, rainy | Tie | 3 |
| September | 85Ahot, rainy, clean air | 80Ahot, rainy, clean air | St. Louis | 5 |
| October | 84Anice, a little rain, clean air | 85Anice, rainy, clean air | Tie | 1 |
| November | 68Ccool, a little rain, clean air | 71Bcool, a little rain, clean air | Tie | 3 |
| December | 59Dcold, a little rain, clean air | 58Dcold, rainy, clean air | Tie | 1 |
A month is a tie when the two are within 3 points. The widest gap is January (50 vs 59). Tap a month for that month's temperature, rain, humidity and air quality side by side.