SeasonMapChiang Mai vs San Francisco: which is better, month by month
San Francisco beats Chiang Mai in 9 of 12 months — its lead peaks in August (95 vs 46) — while Chiang Mai wins December to February.
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.
Chiang Mai vs San Francisco — all 12 months
| Month | Chiang Mai | San Francisco | Winner | Gap |
|---|---|---|---|---|
| January | 87Ahot, dry | 68Ccool, rainy, clean air | Chiang Mai | 19 |
| February | 82Asweltering, dry | 75Bcool, rainy, muggy air | Chiang Mai | 7 |
| March | 65Csweltering, dry | 76Bcool, rainy, clean air | San Francisco | 11 |
| April | 54Dsweltering, dry | 85Anice, a little rain, clean air | San Francisco | 31 |
| May | 52Dsweltering, rainy | 88Anice, dry, clean air | San Francisco | 36 |
| June | 60Csweltering, rainy, clean air | 92Snice, dry, clean air | San Francisco | 32 |
| July | 53Dsweltering, soaked, clean air | 93Snice, dry, clean air | San Francisco | 40 |
| August | 46Fsweltering, soaked, clean air | 95Snice, dry, clean air | San Francisco | 49 |
| September | 49Fsweltering, soaked, muggy air | 96Snice, dry, clean air | San Francisco | 47 |
| October | 61Csweltering, soaked, muggy air | 90Snice, dry, clean air | San Francisco | 29 |
| November | 74Bsweltering, a little rain, muggy air | 80Anice, a little rain, clean air | San Francisco | 6 |
| December | 84Ahot, dry | 67Ccool, rainy, clean air | Chiang Mai | 17 |
A month is a tie when the two are within 3 points. The widest gap is August (46 vs 95). Tap a month for that month's temperature, rain, humidity and air quality side by side.