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.
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
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