Williamsport Weather in September

Williamsport in September averages 24°C (75°F) during the day and 12°C (54°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Williamsport in September

This month experiences about 11 days of rain according to historical data, averaging 105 mm (4.1 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Williamsport in September

If you're visiting Williamsport in September, expect highs of 24°C (75°F) and overnight lows around 12°C (54°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. At 12°C (54°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Williamsport.

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• January
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• May
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• October
• November
• December

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

Williamsport Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 24°C (75°F)  

Chance of Rain 35%  

Precipitation 105 mm (4.1 in)  

Rainy days 11 days  

What to Wear in Williamsport in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes.

What To Do in Williamsport in September

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

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 Williamsport's climate page.

More climate data for Williamsport

Temperature Rainfall

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