When to go
The Best Time to Visit San Diego
Month-by-month climate data for San Diego, United States — daily highs and lows, rain days, and an honest verdict for every month of the year.
Timing is the first real decision when planning San Diego— it drives crowds, prices and what's actually open. Here's how the year breaks down so you can pick dates that fit the trip you're building, not just the weather.
March–May, September–November. Mild dry shoulder months; summer is famously foggy (June Gloom) along the coast.
Warmest in San Diego: Aug (26°C / 79°F) · Coolest: Jan (17°C / 63°F) · Wettest: Mar (~10 rain days)
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)
San Diego climate, month by month
January
17° / 8°C
~7 rain days
Excellent
February
18° / 8°C
~6 rain days
Excellent
March
17° / 10°C
~10 rain days
Excellent
April
19° / 12°C
~3 rain days
Excellent
May
20° / 14°C
~1 rain days
Excellent
June
22° / 16°C
~1 rain days
Excellent
July
24° / 18°C
~0 rain days
Excellent
August
26° / 19°C
~1 rain days
Excellent
September
25° / 18°C
~1 rain days
Excellent
October
24° / 15°C
~2 rain days
Excellent
November
21° / 11°C
~3 rain days
Excellent
December
18° / 9°C
~5 rain days
Excellent
Plan around it
Dates locked in? Start from the San Diego travel guide or jump straight to a 3-day, 5-day or 7-day itinerary.