Hummelstown Weather in September

Hummelstown in September averages 25°C (77°F) during the day and 14°C (57°F) at night. This is the wettest month of the year.

Rainfall in Hummelstown in September

It's the month with the heaviest rainfall, so an umbrella is a must to navigate the wet weather. Records from the past 30 years suggest around 9 days of rain, with 140 mm (5.5 in) average for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Hummelstown in September

In September, Hummelstown gets high temperatures, with highs of 25°C (77°F). Nights cool to around 14°C (57°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights drop to around 14°C (57°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Hummelstown in September

With approximately 226 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Hummelstown.

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• 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 Hummelstown's climate page.

Hummelstown Temperature in September

Min Temperature 14°C (57°F)  

Max Temperature 25°C (77°F)  

Chance of Rain 30%  

Precipitation 140 mm (5.5 in)  

Rainy days 9 days  

Humidity 73% *  

Sunshine 226 hours *  

Percentage Sunshine 61% *  

* Data from: Harrisburg, the United States of America (15 KM, 9 Miles).

What to Wear in Hummelstown 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. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Hummelstown in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

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 Hummelstown's climate page.

More climate data for Hummelstown

Temperature Rainfall Sunshine Humidity

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