Coronado Weather in September

What's the weather like in Coronado (California) in September 2025?

The climate in Coronado during September can be summarized as warm, humid and very dry.

September is in the fall / autumn in Coronado and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a muggy 25°C (77°F), whilst at night 18°C (64°F) is normal.

Coronado weather averages (imperial / metric)
Daytime temperature 24.9°C 76.8°F
Nightly temperature 17.7°C 63.9°F
Average temperature 21.3°C 70.3°F
Daily sunshine 9.1 hrs
Avg rainfall 4 mm 0.2 ins
Rainy days 1 days
Sea temperature 20.5°C 68.9°F
Humidity 73%
Windspeed 13.3kph 8 mph

On average September is the 4th driest month of the year in Coronado with around 4mm 0.2 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 9.1 hours of sunshine per day.

September temperatures in Coronado

Coronado average temperature in September

September rainfall

Coronado average rain in September

September hourly sunshine

Coronado average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Coronado in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Coronado weather stats

Coronado weather statistics
Hottest month: August 25°C 77°F
Driest month: July 1mm 0ins
Sunniest month: January 8.4hrs
Coldest month: January 18.6°C 65.5°F
Wettest month: January 56mm 2.2ins
Map showing location of Coronado (32.68589, -117.18309) Coronado map pin © Google

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