SeasonMapCharleston vs San Francisco: which is better, month by month
Charleston and San Francisco split the year 6–6 — Charleston wins November to April, San Francisco wins May to October.
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.
Charleston vs San Francisco — all 12 months
| Month | Charleston | San Francisco | Winner | Gap |
|---|---|---|---|---|
| January | 74Bcool, a little rain, clean air | 68Ccool, rainy, clean air | Charleston | 6 |
| February | 79Bnice, a little rain, clean air | 75Bcool, rainy, muggy air | Charleston | 4 |
| March | 86Anice, a little rain | 76Bcool, rainy, clean air | Charleston | 10 |
| April | 90Snice, rainy, clean air | 85Anice, a little rain, clean air | Charleston | 5 |
| May | 80Ahot, rainy, clean air | 88Anice, dry, clean air | San Francisco | 8 |
| June | 66Chot, rainy, muggy air | 92Snice, dry, clean air | San Francisco | 26 |
| July | 58Dsweltering, rainy, muggy air | 93Snice, dry, clean air | San Francisco | 35 |
| August | 59Dsweltering, soaked, muggy air | 95Snice, dry, clean air | San Francisco | 36 |
| September | 69Chot, rainy, clean air | 96Snice, dry, clean air | San Francisco | 27 |
| October | 85Awarm, a little rain, clean air | 90Snice, dry, clean air | San Francisco | 5 |
| November | 86Anice, a little rain, clean air | 80Anice, a little rain, clean air | Charleston | 6 |
| December | 72Bcool, rainy, clean air | 67Ccool, rainy, clean air | Charleston | 5 |
A month is a tie when the two are within 3 points. The widest gap is August (59 vs 95). Tap a month for that month's temperature, rain, humidity and air quality side by side.