SeasonMapPhoenix vs San Diego: which is better, month by month
San Diego beats Phoenix in 6 of 12 months — its lead peaks in July (92 vs 29) — while Phoenix wins November to March; they are within 3 points in April.
Each place is scored under the lens that suits its type — they are different kinds of destination, so the scores are each place at its own best. Comfort is SeasonMap's 0–100 estimate from ERA5 climate normals, not a forecast.
Phoenix vs San Diego — all 12 months
| Month | Phoenix | San Diego | Winner | Gap |
|---|---|---|---|---|
| January | 78Bnice, dry | 70Bnice, a little rain, muggy air | Phoenix | 8 |
| February | 88Anice, dry, clean air | 74Bnice, a little rain | Phoenix | 14 |
| March | 95Snice, dry | 78Bnice, a little rain, muggy air | Phoenix | 17 |
| April | 84Ahot, dry | 83Anice, dry, muggy air | Tie | 1 |
| May | 67Chot, dry | 85Anice, dry, clean air | San Diego | 18 |
| June | 37Fsweltering, dry | 87Awarm, dry, clean air | San Diego | 50 |
| July | 29Fsweltering, dry | 92Swarm, dry, muggy air | San Diego | 63 |
| August | 34Fsweltering, dry | 93Shot, dry, muggy air | San Diego | 59 |
| September | 49Fsweltering, dry, clean air | 91Swarm, dry, muggy air | San Diego | 42 |
| October | 74Bhot, dry, clean air | 89Awarm, dry | San Diego | 15 |
| November | 92Snice, dry, clean air | 79Bnice, dry | Phoenix | 13 |
| December | 81Anice, dry | 71Bnice, a little rain, muggy air | Phoenix | 10 |
A month is a tie when the two are within 3 points. The widest gap is July (29 vs 92). Tap a month for that month's temperature, rain, humidity and air quality side by side.