San Diego Weather

Mediterranean Climate

Mild / Sunny / Dry

Average Temperature: 70°F (21°C) | Annual Rainfall: 10 inches

Year-round Coastal

Weather Tip: San Diego enjoys one of the most pleasant climates in the U.S. with warm summers and mild winters, making it an ideal destination any time of year.

Seasonal Weather Patterns

1Summer (June-August)

Average highs around 76°F (24°C) with cool ocean breezes.

Coastal areas remain comfortable while inland valleys can be warmer.

2Fall (September-November)

Warmest months with temperatures reaching 85°F (29°C).

Known as "Santa Ana" season with occasional warm winds.

3Winter (December-February)

Mild with average highs of 66°F (19°C).

Rainfall is most likely during these months.

4Spring (March-May)

Pleasant temperatures around 70°F (21°C).

May Gray and June Gloom bring morning marine layer clouds.

Pro Tip: The coastal marine layer often brings morning clouds that burn off by afternoon. Always bring layers when visiting beach areas.

Microclimates

1Coastal Areas

Most moderate temperatures year-round (60-75°F).

Influenced by Pacific Ocean currents.

2Inland Valleys

Warmer summers (up to 90°F) and cooler winters.

Less marine influence means greater temperature swings.

3Mountain Areas

Can experience snow in winter months.

Significant temperature drops at higher elevations.

Weather Phenomena

1Marine Layer

Morning clouds that typically burn off by afternoon.

Most common in late spring/early summer.

2Santa Ana Winds

Hot, dry winds from the northeast.

Most frequent in fall, can increase fire danger.

3El Niño Effects

Brings increased rainfall during winter months.

Can cause coastal erosion and flooding.

4Drought Conditions

Common due to limited rainfall.

Water conservation measures often implemented.

Important: While San Diego has excellent weather overall, always check current conditions as microclimates can create significant variations across short distances.