Weather in September 2025

Princeton weather in September 2025

The temperatures in Princeton in September are comfortable with low of 17°C and and high up to 25°C.

You can expect about 3 to 8 days of rain in Princeton during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Our weather forecast can give you a great sense of what weather to expect in Princeton in September 2025.

If you’re planning to visit Princeton in the near future, we highly recommend that you review the 14 day weather forecast for Princeton before you arrive.

Temperatures
Temperatures
25° / 17°
Rainy Days
Rainy Days
5
Snowy Days
Snowy Days
0
Dry Days
Dry Days
25
Rainfall
Rainfall
111
mm
10.2
Sun Hours
10.2
Hrs

Princeton annual weather

Month Temperatures Rainy Days Dry Days Snowy Days Rainfall Weather More details
January 3° / -3° 6 18 7 89 mm
Awful
February 5° / -2° 7 14 7 117 mm
Awful
March 9° / 2° 7 18 5 127 mm
Awful
April 15° / 7° 6 24 1 105 mm
Good
May 21° / 12° 7 24 0 130 mm
Ok
June 26° / 17° 7 23 0 131 mm
Good
July 29° / 21° 9 22 0 180 mm
Ok
August 28° / 20° 7 24 0 174 mm
Good
September 25° / 17° 5 25 0 111 mm
Perfect
October 18° / 11° 5 25 0 134 mm
Good
November 11° / 5° 5 24 1 91 mm
Ok
December 7° / 1° 7 20 5 142 mm
Awful
Temperatures in Princeton in September
Rain in Princeton in September

Recommended Hotels in Princeton

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Weather in Princeton in September - FAQ

What is the average temperature in Princeton in September?
The average temperature in Princeton in September is 17/25° C.
What is the chance of rain in Princeton in September?
On average, there are 5 rainy days in Princeton during September.
Weather wise, is September a good time to visit Princeton?
The weather in Princeton in September is perfect.
Can it snow in Princeton in September?
On average, there are 0 snowy days in Princeton in September.
More about the weather in Princeton