Bethlehem Weather in September

Bethlehem 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 113 mm (4.4 in), so pack a rain jacket to stay dry.

Rainfall in Bethlehem in September

Historically, September sees about 10 days of rain, with a monthly average of 113 mm (4.4 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Bethlehem in September

If you're visiting Bethlehem in September, expect highs of 25°C (77°F) and overnight lows around 13°C (55°F). This kind of day-to-night contrast is typical for this time of year. At 13°C (55°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 your ideal day consists of dry skies and pleasant temperatures, May typically offers the best circumstances for Bethlehem.

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

Bethlehem Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 25°C (77°F)  

Chance of Rain 32%  

Precipitation 113 mm (4.4 in)  

Rainy days 10 days  

Humidity 74% *  

* Data from: Allentown, the United States of America (8 KM, 4 Miles).

What to Wear in Bethlehem 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 Bethlehem 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 Bethlehem's climate page.

More climate data for Bethlehem

Temperature Rainfall Humidity

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