Clarion Weather in September

What's the weather like in Clarion (Pennsylvania) in September 2025?

The climate in Clarion during September can be summarized as mild and a little damp.

September is in the fall / autumn in Clarion and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 22°C (72°F), whilst at night 10°C (51°F) is normal.

Clarion weather averages (imperial / metric)
Daytime temperature 22.4°C 72.2°F
Nightly temperature 10.3°C 50.5°F
Average temperature 16.3°C 61.3°F
Daily sunshine 7 hrs
Avg rainfall 97 mm 3.8 ins
Rainy days 11 days
Sea temperature 20.3°C 68.5°F
Humidity 75%
Windspeed 13.3kph 8 mph

On average September is the 5th wettest month of the year in Clarion with around 97mm 3.8 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.

On the flip side this corresponds to an average of 7 hours of sunshine per day.

September temperatures in Clarion

Clarion average temperature in September

September rainfall

Clarion average rain in September

September hourly sunshine

Clarion 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 Clarion 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

Clarion weather stats

Clarion weather statistics
Hottest month: July 27.1°C 80.8°F
Driest month: February 65mm 2.6ins
Sunniest month: July 9.4hrs
Coldest month: January -0.4°C 31.3°F
Wettest month: June 118mm 4.6ins
Map showing location of Clarion (41.21479, -79.38532) Clarion map pin © Google

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