September through November (fall shoulder season). San Diego Tourism Authority and multiple travel sources identify fall as the sweet spot: summer crowds thin out after Labor Day, weather remains warm and sunny (avg highs 75–80°F in September, still 70°F in October), hotel rates drop, and the city hosts its own strong event calendar (Miramar Air Show, Fleet Week, Beer Week). 'June Gloom' coastal fog that can affect early summer is absent in fall
| Month | High (°F) | Low (°F) | Notes |
|---|---|---|---|
| Jan | 64 | 48 | mild & mostly dry |
| Feb | 64 | 48 | mild & mostly dry |
| Mar | 65 | 51 | mild & mostly dry |
| Apr | 68 | 54 | mild & sunny |
| May | 69 | 57 | mild & sunny |
| Jun | 72 | 60 | mild & sunny |
| Jul | 76 | 64 | warm & sunny |
| Aug | 78 | 65 | warm & sunny |
| Sep | 78 | 64 | warm & sunny |
| Oct | 74 | 60 | warm & sunny |
| Nov | 70 | 53 | mild & sunny |
| Dec | 64 | 48 | mild & mostly dry |