Allentown weather in September (Pennsylvania, United States of America)

What kind of temperatures can you expect in Allentown during September? Our page offers a comprehensive look at the weather you can expect this month.

Temperatures

In September, the weather in Allentown generally includes high temperatures and high rainfall. As the day progresses, temperatures can peak at 25°C. Luckily at nightfall, they typically drop to 13°C.

Precipitation

Allentown in September usually receives high rainfall, averaging around 118 mm for the month. On average, there are about 10 days with rain during this month.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit. May, June, August and September generally stand out with the best circumstances. While January, February, March and December tend to showcase less optimal conditions.

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

 

Allentown, monthly averages in September

Min Temperature 13°C  

Max Temperature 25°C  

Chance of Rain 33%  

Precipitation 118 mm  

Rainy days 10 days  

Humidity 74%  

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 Allentown, 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

6/10

Outdoor sports

9/10

Interested in more climate information?

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

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.