Parsippany Weather in September

What's the weather like in Parsippany (New Jersey) in September 2025?

The climate in Parsippany during September can be summarized as mild and damp.

September is in the fall / autumn in Parsippany and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 23°C (74°F), whilst at night 11°C (51°F) is normal.

Parsippany weather averages (imperial / metric)
Daytime temperature 23.4°C 74.1°F
Nightly temperature 10.8°C 51.4°F
Average temperature 17.1°C 62.8°F
Daily sunshine 7.6 hrs
Avg rainfall 113 mm 4.4 ins
Rainy days 9 days
Sea temperature 21°C 69.8°F
Humidity 70%
Windspeed 15.5kph 10 mph

On average September is the 5th wettest month of the year in Parsippany with around 113mm 4.4 inches of rain making it a damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.6 hours of sunshine per day.

September temperatures in Parsippany

Parsippany average temperature in September

September rainfall

Parsippany average rain in September

September hourly sunshine

Parsippany 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 Parsippany 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

Parsippany weather stats

Parsippany weather statistics
Hottest month: July 28°C 82.4°F
Driest month: February 83mm 3.3ins
Sunniest month: August 9hrs
Coldest month: January 1.2°C 34.2°F
Wettest month: July 118mm 4.6ins
Map showing location of Parsippany (40.85788, -74.42599) Parsippany map pin © Google

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