SeasonMapSan Francisco vs Seattle: which is better, month by month
San Francisco beats Seattle in 8 of 12 months — its lead peaks in November (80 vs 57) — while Seattle wins July; they are within 3 points in May, June and August.
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.
San Francisco vs Seattle — all 12 months
| Month | San Francisco | Seattle | Winner | Gap |
|---|---|---|---|---|
| January | 68Ccool, rainy, clean air | 52Dcold, rainy, clean air | San Francisco | 16 |
| February | 75Bcool, rainy, muggy air | 58Dcold, rainy, clean air | San Francisco | 17 |
| March | 76Bcool, rainy, clean air | 67Ccold, a little rain, clean air | San Francisco | 9 |
| April | 85Anice, a little rain, clean air | 77Bcool, a little rain, clean air | San Francisco | 8 |
| May | 88Anice, dry, clean air | 85Anice, a little rain, clean air | Tie | 3 |
| June | 92Snice, dry, clean air | 92Snice, dry, clean air | Tie | 0 |
| July | 93Snice, dry, clean air | 97Swarm, dry, clean air | Seattle | 4 |
| August | 95Snice, dry, clean air | 95Swarm, dry, clean air | Tie | 0 |
| September | 96Snice, dry, clean air | 89Anice, a little rain, clean air | San Francisco | 7 |
| October | 90Snice, dry, clean air | 72Bcool, a little rain, clean air | San Francisco | 18 |
| November | 80Anice, a little rain, clean air | 57Dcold, rainy, clean air | San Francisco | 23 |
| December | 67Ccool, rainy, clean air | 49Fcold, rainy, clean air | San Francisco | 18 |
A month is a tie when the two are within 3 points. The widest gap is November (80 vs 57). Tap a month for that month's temperature, rain, humidity and air quality side by side.