Yosemite National Park is definitely worth a visit
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Allentown Weather in September
Allentown in September sees high daytime temperatures of 25°C (77°F) and nighttime lows of 13°C (55°F). Rainfall is fairly high this month at around 118 mm (4.6 in), so pack a rain jacket to stay dry.
Rainfall in Allentown in September
You can typically expect 10 days of rain this month, averaging around 118 mm (4.6 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Allentown in September
In September, expect high temperatures in Allentown, with highs of 25°C (77°F) and lows of 13°C (55°F) at night. Conditions stay fairly consistent through the month, making it easier to plan what to wear. With lows of 13°C (55°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.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Allentown Temperature in September
Min Temperature
13°C (55°F)
Max Temperature
25°C (77°F)
Chance of Rain
33%
Precipitation
118 mm (4.6 in)
Rainy days
10 days
Humidity
74%
Allentown Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Allentown - and find the best time to visit.
Best Places 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. See all of the United States of America in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Allentown in September
For Allentown 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 Allentown in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Camping6/10 -
Outdoor sports9/10
Allentown 3-Day Forecast
More climate data for Allentown
See the full Allentown climate overview or explore weather in the United States of America.
Popular in September
Where to go in September - average daytime high across popular destinations.
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