San Diego in September

Average high

25°C

77°F

Average low

19°C

66°F

Precipitation

3 mm

Wet days

1

Climate data: NOAA (San Diego International Airport, 1991–2020). Temperatures are averages of daily highs and lows.

Is September a good time to visit San Diego?

September is one of the best months to visit San Diego. It ranks 2 of 12 months in San Diego overall (1 for weather, 5 for space, 6 for value). The main upside: Warm water, fewer people. The main downside: Hot spells are possible inland.

What is the weather like in San Diego in September?

Average highs are around 25°C and lows around 19°C. Expect about 3 mm of rain or snow over roughly 1 wet days. Warm and sunny. For comparison, the warmest month is August (around 25°C) and the coolest is January (around 19°C).

Is San Diego crowded in September?

Crowds are moderate. Calmer after Labor Day. The quietest month is January.

How expensive is San Diego in September?

Prices are at level 3 of 5 ($$$). Rates ease after Labor Day. The best-value month is November.

When is the best time to visit San Diego?

In the CrowdFreeViews month scores, October is the best month overall (September ranks 2 of 12). The quietest month is January and the best value is November.