Measured, not vibes
Best Time to Visit San Diego
By measured weather comfort, the top months for San Diego are July, June, October — and RouteVerdict's editorial pick, which also weighs crowds and prices, is March, April, May, September, October, November. The table below is computed from ERA5 reanalysis data for 2020–2024, measured at San Diego (20 m elevation).
Month by month
San Diego weather and comfort, 2020–2024
| Month | Avg high | Wet days | Comfort | Season |
|---|---|---|---|---|
| January | 17.4°C / 63°F | 5.5 | 73 | |
| February | 17.9°C / 64°F | 4.7 | 77 | |
| March | 17.4°C / 63°F | 8.8 | 68 | |
| April | 19.3°C / 67°F | 2.8 | 87 | |
| May | 20.2°C / 68°F | 1.2 | 93 | |
| June | 22.2°C / 72°F | 0.5 | 99 | Best |
| July | 24.2°C / 76°F | 0.2 | 99 | Best |
| August | 25.5°C / 78°F | 0.7 | 95 | Shoulder |
| September | 25.6°C / 78°F | 1.2 | 94 | |
| October | 23.9°C / 75°F | 1.8 | 96 | Best |
| November | 21°C / 70°F | 2.5 | 93 | |
| December | 18°C / 64°F | 3.7 | 79 | Shoulder |
Comfort is RouteVerdict's 0–100 score: 100·exp(−(high−23)²/162) × (1 − min(0.35, wet days × 0.02)). The full method is on the methodology page. Weather data by Open-Meteo.com (ERA5, CC BY 4.0), 2020–2024 normals. Wet day = ≥1 mm precipitation.
FAQ
San Diego timing questions
What is the best month to visit San Diego?
By measured weather comfort (ERA5 2020–2024), the top months are July, June, and October, with July scoring highest. RouteVerdict's editorial pick is March, April, May, September, October, and November, which also weighs crowds, prices, and events.
What is the hottest month in San Diego?
September, with an average daily high of 25.6°C (78°F).
What is the rainiest month in San Diego?
March, averaging 8.8 days with at least 1 mm of precipitation.
When is shoulder season in San Diego?
August and December — the best-scoring months outside both the measured top three and RouteVerdict's editorial peak-season pick.