San Diego Weather by Month
Twelve months of San Diego, United States weather — averages from 2006–2025.
San Diego's warmest month is August (average high 25.4°C (77.7°F)) and the coolest is February (17.6°C (63.7°F)). The most rain falls in December (about 56 mm), and June is the driest (about 1 mm). July is the sunniest, with about 12.9 hours of sunshine a day.
Best months to visit San Diego
Ranked within San Diego's own year by temperature comfort, rainy days and sunshine — historical averages, not a forecast.
San Diego month by month
January
GreatHigh 17.7°C (63.9°F)
Low 8.5°C (47.3°F)
- Rainfall
- 55 mm (2.2 in)
- Rainy days
- 5 rainy days
- Sunshine
- 8.9 h sunshine / day
February
GoodHigh 17.6°C (63.7°F)
Low 9°C (48.2°F)
- Rainfall
- 53 mm (2.1 in)
- Rainy days
- 6 rainy days
- Sunshine
- 9.4 h sunshine / day
March
GreatHigh 18°C (64.4°F)
Low 10.3°C (50.5°F)
- Rainfall
- 47 mm (1.9 in)
- Rainy days
- 6 rainy days
- Sunshine
- 10.6 h sunshine / day
April
GreatHigh 19.4°C (66.9°F)
Low 12°C (53.6°F)
- Rainfall
- 20 mm (0.8 in)
- Rainy days
- 3 rainy days
- Sunshine
- 11.4 h sunshine / day
May
GreatHigh 20.1°C (68.2°F)
Low 13.7°C (56.7°F)
- Rainfall
- 11 mm (0.4 in)
- Rainy days
- 2 rainy days
- Sunshine
- 11.9 h sunshine / day
June
GreatHigh 22.1°C (71.8°F)
Low 15.4°C (59.7°F)
- Rainfall
- 1 mm (0.1 in)
- Rainy days
- 0 rainy days
- Sunshine
- 12.6 h sunshine / day
July
GreatHigh 24.3°C (75.7°F)
Low 17.8°C (64°F)
- Rainfall
- 4 mm (0.1 in)
- Rainy days
- 1 rainy days
- Sunshine
- 12.9 h sunshine / day
August
GreatHigh 25.4°C (77.7°F)
Low 18.3°C (64.9°F)
- Rainfall
- 6 mm (0.2 in)
- Rainy days
- 1 rainy days
- Sunshine
- 12.2 h sunshine / day
September
GreatHigh 25.3°C (77.5°F)
Low 17.9°C (64.2°F)
- Rainfall
- 9 mm (0.4 in)
- Rainy days
- 1 rainy days
- Sunshine
- 11.2 h sunshine / day
October
GreatHigh 23.6°C (74.5°F)
Low 15.2°C (59.4°F)
- Rainfall
- 13 mm (0.5 in)
- Rainy days
- 2 rainy days
- Sunshine
- 10.2 h sunshine / day
November
GreatHigh 20.9°C (69.6°F)
Low 11.8°C (53.2°F)
- Rainfall
- 32 mm (1.2 in)
- Rainy days
- 4 rainy days
- Sunshine
- 9.4 h sunshine / day
December
GoodHigh 17.6°C (63.7°F)
Low 9°C (48.2°F)
- Rainfall
- 56 mm (2.2 in)
- Rainy days
- 6 rainy days
- Sunshine
- 8.4 h sunshine / day
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Based on 20 years of historical weather data (2006–2025) from Open-Meteo. Monthly averages, not a forecast.