Average temperatures, rainfall and packing tips for San Diego, United States in September
🌡️ Avg high
25°C
🌙 Avg low
18°C
🌧️ Rainfall
~2 mm
📊 Warmth rank
#3 of 12
September in San Diego at a glance
September in San Diego is typically warm, with average daytime highs around 25°C and nights near 18°C. It is one of the warmer months of San Diego's year.
September is essentially dry in San Diego - rainfall is negligible on average.
What to pack for San Diego in September
T-shirts and light layers
A light jacket or sweater for the evenings
San Diego - year at a glance
HighLow · September highlighted
Is September a good time to visit San Diego?
🧳 September is one of the most comfortable months to visit San Diego - daytime temperatures sit in a pleasant range and it's a good pick for sightseeing and time outdoors.
In September, San Diego averages a daytime high of about 25°C and a night-time low of around 18°C, based on recent historical data.
Does it rain in San Diego in September?
September is essentially dry in San Diego - rainfall is negligible on average.
Is September a good time to visit San Diego?
September is one of the most comfortable months to visit San Diego - daytime temperatures sit in a pleasant range and it's a good pick for sightseeing and time outdoors.