Typical Weather in San Diego, CA in September

77° F Avg High

66° F Avg Low

0 Rainy Days

☀️ Temperature Summary

September is one of the warmer months of the year for San Diego, with highs averaging around 77°F. You can expect overnight lows near 66°F most days. Daily high temperatures can range between 77°F and 75°F, and typically fall throughout the month.

The warm, dry temperatures in September make San Diego a great destination to relax and soak up the sun.

High Temps Throughout the Year

☔ Rain Summary

You can expect about a 1% chance of rain for any given day in September. It's one of the drier months of the year for San Diego, with total rainfall for the month around 0 inches.