King of Prussia Weather in September

Thinking of visiting King of Prussia in September? Expect high temperatures reaching 26°C (79°F) during the day, dropping to 14°C (57°F) at night, and note that quite a bit of rainfall is likely.

Rainfall in King of Prussia in September

Records from the past 30 years suggest around 8 days of rain, with 107 mm (4.2 in) average for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in King of Prussia in September

Expect highs of 26°C (79°F) in King of Prussia in September, with nights dropping to around 14°C (57°F). Overall, the month follows a fairly predictable daily temperature pattern. At 14°C (57°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.

Sunshine in King of Prussia in September

The days are predominantly sunny, with an estimated total of around 218 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Average water temperature in September

The water is 22°C (72°F) this month — warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.

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

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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 King of Prussia's climate page.

King of Prussia Temperature in September

Min Temperature 14°C (57°F)  

Max Temperature 26°C (79°F)  

Water Temperature 22°C (72°F) *  

Chance of Rain 27%  

Precipitation 107 mm (4.2 in)  

Rainy days 8 days  

Humidity 72% *  

Sunshine 218 hours *  

Percentage Sunshine 59% *  

* Data from: Philadelphia, the United States of America (24 KM, 15 Miles).

What to Wear in King of Prussia in September

Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Expect water temperatures of around 22°C (72°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in King of Prussia in September

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

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

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 King of Prussia's climate page.

More climate data for King of Prussia

Temperature Rainfall Sunshine Humidity Water Temp

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