Dublin Weather in September

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

The climate in Dublin during September can be summarized as warm and very dry.

September is in the fall / autumn in Dublin and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 28°C (82°F), whilst at night 12°C (53°F) is normal.

Dublin weather averages (imperial / metric)
Daytime temperature 27.5°C 81.5°F
Nightly temperature 11.9°C 53.4°F
Average temperature 19.7°C 67.5°F
Daily sunshine 10.7 hrs
Avg rainfall 7 mm 0.3 ins
Rainy days 2 days
Sea temperature 14.9°C 58.9°F
Humidity 64%
Windspeed 15.1kph 9 mph

On average September is the 4th driest month of the year in Dublin with around 7mm 0.3 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 10.7 hours of sunshine per day.

September temperatures in Dublin

Dublin average temperature in September

September rainfall

Dublin average rain in September

September hourly sunshine

Dublin 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 Dublin 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

Dublin weather stats

Dublin weather statistics
Hottest month: July 28.5°C 83.3°F
Driest month: July 2mm 0.1ins
Sunniest month: April 11.3hrs
Coldest month: January 12.9°C 55.2°F
Wettest month: January 96mm 3.8ins
Map showing location of Dublin (37.70215, -121.93579) Dublin map pin © Google

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