Princeton Weather in September

With daytime temperatures of 25°C (77°F) and nighttime lows of 12°C (54°F), September in Princeton brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 90 mm (3.5 in) falls on average.

Rainfall in Princeton in September

You can expect rain on roughly 8 days based on historical data, averaging 90 mm (3.5 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Princeton in September

If you're visiting Princeton in September, expect excellent temperatures with highs of 25°C (77°F) and overnight lows of 12°C (54°F). Overall, the month follows a fairly predictable daily temperature pattern. With lows of 12°C (54°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.

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Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Princeton's climate page.

Princeton Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 25°C (77°F)  

Chance of Rain 28%  

Precipitation 90 mm (3.5 in)  

Rainy days 8 days  

What to Wear in Princeton in September

For Princeton in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.

What To Do in Princeton in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

9/10

Walking

9/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Princeton's climate page.

More climate data for Princeton

Temperature Rainfall

See the full Princeton climate overview or explore weather in the United States of America.