THINGS TO DO · YOUTUBE SHORT
Princeton University, NJ!
A local activity Short shared by Elizabeth Walk.
Watch on YouTube ↗
Weather · September
Princeton weather in September
Average highs of 77°F, lows of 58°F and 4.0 in of rain, from 30 years of weather records.
September is Princeton’s 4th warmest month, with average highs of 77°F and lows of 58°F. That is 7° cooler than August, and 14° above the yearly average high.
- Average high
- 77°F
- Average low
- 58°F
- Precipitation
- 4.0 in
- Wet days
- 9
- Sunrise · sunset
- 6:39 AM · 7:09 PM
September across the year
High and low Rain
What to wear in September
- Warm days: shorts and T-shirts, with a light layer for cooler evenings.
- Pack an umbrella or rain jacket: rain or snow falls on about 9 days this month.
September is good for
What’s on in Princeton in September
See all upcoming events and school days off.
Around Princeton
See Princeton
A look around town before you go.
THINGS TO DO · YOUTUBE SHORT
Things to do in New Jersey | Explore Princeton
A local activity Short shared by Papali Dash.
Watch on YouTube ↗September compared with the months around it
Planning a trip? See the best time to visit Princeton and today’s forecast.
Questions
How hot does it get in Princeton in September?
Average highs are 77°F and average lows 58°F, for a daily mean of 67°F. Individual days run hotter or colder than these 30-year averages.
Does it rain in Princeton in September?
September averages 4.0 in of precipitation over about 9 days with at least 0.01 in. It is the 6th wettest month of the year.
What time is sunset in Princeton in September?
Around mid-September the sun rises about 6:39 AM and sets about 7:09 PM, for roughly 12.5 hours of daylight.
Is September a good time to visit Princeton?
Yes. September is one of the mildest months, with highs between 65°F and 85°F and little rain.
NOAA U.S. Climate Normals 1991–2020, Trenton Mercer Co Ap station (9.7 mi from downtown). Sunrise and sunset are calculated for September 15 at the city’s coordinates.