Best time to visit San Diego
The best months to visit San Diego are July, October and August, based on month-by-month temperature and rainfall data. The full year of weather, daylight, holidays, and festival timing is below.
July, October and August score best for San Diego weather:
- July24° / 19°CJuly is warm and beach-friendly, with crowds around La Jolla, Coronado, and Pacific Beach.
- August25° / 19°CAugust is the warmest and driest month, ideal for water time but busy on the coast.
- October24° / 16°COctober is warm and mostly dry, good for Balboa Park, North Park, and La Jolla sunsets.
Get a San Diego plan you can trust — matched to the month you pick, with every place checked for hours, closures, and booking needs.
- Free. No account.
- Ready in about 30 seconds.
30% off a Going membership after you build your plan.
By TripSapien Research · Updated May 20, 2026
San Diego weather by month
| Month | High | Low | Rain (mm) | Rainy days | Daylight | Sea |
|---|---|---|---|---|---|---|
| January | 20° | 10° | 50 | 6 | 10h | 13° |
| February | 20° | 10° | 55 | 7 | 11h | 15° |
| March | 20° | 12° | 35 | 6 | 12h | 15° |
| April | 21° | 13° | 15 | 4 | 13h | 17° |
| May | 21° | 15° | 7 | 2 | 14h | 18° |
| June | 22° | 17° | 1 | 1 | 14h | 20° |
| JulyBest weather | 24° | 19° | 2 | 1 | 14h | 21° |
| AugustBest weather | 25° | 19° | 0 | 0 | 13h | 22° |
| September | 25° | 19° | 3 | 1 | 12h | 20° |
| OctoberBest weather | 24° | 16° | 13 | 2 | 11h | 18° |
| November | 22° | 12° | 20 | 4 | 10h | 18° |
| December | 19° | 9° | 40 | 6 | 10h | 17° |
Temperatures in °C. Long-term monthly averages.
Know your San Diego month?
Pick your dates and we'll build the trip around them — every place checked for closures and booking needs.
San Diego month by month
January
San Diego in January: 19.6°C high, 9.5°C low, 50mm rain over 6 days, 10.1h daylight. Mild and dry — shoulder-season sweet spot.
February
San Diego in February: 19.5°C high, 10.3°C low, 55mm rain over 7 days, 10.8h daylight. Mild and dry — shoulder-season sweet spot.
March
San Diego in March: 19.8°C high, 11.9°C low, 35mm rain over 6 days, 11.8h daylight. Mild and dry — shoulder-season sweet spot.
April
San Diego in April: 20.8°C high, 13.3°C low, 15mm rain over 4 days, 12.8h daylight. Mild and dry — shoulder-season sweet spot.
May
San Diego in May: 21.2°C high, 15.3°C low, 7mm rain over 2 days, 13.7h daylight. Mild and dry — shoulder-season sweet spot.
June
San Diego in June: 22.2°C high, 16.6°C low, 1mm rain over 1 days, 14.2h daylight. Mild and dry — shoulder-season sweet spot.
JulyBest weather
San Diego in July: 24.1°C high, 18.6°C low, 2mm rain over 1 days, 14h daylight. Mild and dry — shoulder-season sweet spot.
San Diego Comic-Con International
AugustBest weather
San Diego in August: 25.2°C high, 19.4°C low, 0mm rain over 0 days, 13.2h daylight. Mild and dry — shoulder-season sweet spot.
September
San Diego in September: 25.3°C high, 18.6°C low, 3mm rain over 1 days, 12.2h daylight. Mild and dry — shoulder-season sweet spot.
OctoberBest weather
San Diego in October: 24.2°C high, 16°C low, 13mm rain over 2 days, 11.2h daylight. Mild and dry — shoulder-season sweet spot.
November
San Diego in November: 22°C high, 12°C low, 20mm rain over 4 days, 10.3h daylight. Mild and dry — shoulder-season sweet spot.
December
San Diego in December: 19.4°C high, 9.2°C low, 40mm rain over 6 days, 9.8h daylight. Mild and dry — shoulder-season sweet spot.
Ready to plan San Diego?
Pick one of the best months and turn it into a full San Diego plan — every place checked for closures, limited hours, and booking needs on your dates.