Princeton weather in September (Illinois, United States of America)

Is Princeton a good destination in September, weather-wise? Our guide gives you the essential weather details for this month.

Temperatures

During September, Princeton is known for its perfect weather, characterized by high temperatures and moderate rainfall. Daytime temperatures hover around 25°C, while nights can cool down to about 12°C.

Precipitation

Princeton in September usually receives moderate rainfall, averaging around 90 mm for the month. Looking at the last 30 years, the data shows about 8 days with rain.

If you favor pleasant temperatures and minimal rainfall, September is one of the better months to visit Princeton. July and September typically offer the most agreeable circumstances. On the other hand, January, February, March, November and December tend to be characterized by conditions that may not be as optimal.

For an in-depth look at the yearly conditions, visit our specialized Princeton climate page with graphs.

 

Princeton, monthly averages in September

Min Temperature 12°C  

Max Temperature 25°C  

Chance of Rain 28%  

Precipitation 90 mm  

Rainy days 8 days  

Where to go in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

For visitors traveling to Princeton, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

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

Interested in more climate information?

This site provides you with all the information you need about the climate in Princeton.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.