San Diego Monthly Climate
Don't forget to check WhereWeather Website for weather statistics on your exact travel dates, for any city in the world. You can also compare different cities and dates side-by-side.
Temperature Overview
- Average Daytime Temperature: 22°C (72°F)
- Average Nighttime Temperature: 14°C (57°F)
Rainfall Statistics
- Annual average daily rainfall: 0.7 mm (0.03 inches) per day
- Rainiest month: February with around 2.1 mm (0.08 inches) per day
- Driest months: June-September with virtually no rainfall
- Average number of rainy days per year: 41 days
Monthly Weather Conditions
Temperature
Precipitation
Seasonal Breakdown
December-February (Winter)
- Highs: 19-20°C (66-68°F)
- Lows: 9-10°C (48-50°F)
- Rainy Days: 5-6 days per month
- Average Precipitation: 1.8 mm/day
March-May (Spring)
- Highs: 19-21°C (66-70°F)
- Lows: 12-15°C (54-59°F)
- Rainy Days: 1-5 days per month
- Average Precipitation: 0.9 mm/day
June-August (Summer)
- Highs: 23-26°C (73-79°F)
- Lows: 17-19°C (63-66°F)
- Rainy Days: 0-1 days per month
- Average Precipitation: 0.1 mm/day
September-November (Fall)
- Highs: 21-25°C (70-77°F)
- Lows: 12-18°C (54-64°F)
- Rainy Days: 1-4 days per month
- Average Precipitation: 0.5 mm/day
Best Time to Visit
San Diego's climate is excellent year-round, but certain periods offer unique advantages:
Spring (March-May) brings mild temperatures and clear skies, perfect for outdoor activities. Wildflowers bloom in nearby deserts, and crowds are moderate. The "May Gray" marine layer can occur in late spring mornings.
Summer (June-August) is peak tourist season with warm, sunny days ideal for beach activities. Expect some morning marine layer ("June Gloom"), which typically burns off by afternoon. Temperatures rarely become uncomfortably hot.
Fall (September-October) is arguably the best time to visit, with warm temperatures, clear skies, and fewer tourists. Water temperatures are at their warmest, making it perfect for swimming and water sports.
Winter (December-February) is mild with occasional rain, perfect for visiting museums, enjoying the city's exceptional dining scene, and exploring Balboa Park.
Other Cities in the United States
Want to explore more of the United States? Check out our weather guides for other American cities:
New York
Northeast metropolis with four distinct seasons
San Francisco
Coastal city with mild Mediterranean climate
Miami
Tropical paradise with warm weather year-round
Chicago
Windy city with continental climate
Los Angeles
Southern California with endless summer
Las Vegas
Desert city with hot, dry climate
Orlando
Theme park capital with subtropical weather
Boston
Historic city with New England seasons
Washington DC
Capital city with four seasons
Before you go ahead and plan your next visit, make sure to check the weather forecast for your exact travel dates on WhereWeather Website. You can also compare different cities and dates side-by-side.