Philadelphia Weather in August

In Philadelphia, August brings high daytime temperatures around 30°C (86°F), with nights cooling to 20°C (68°F). It is the wettest month of the year, so expect more rainfall than usual.

Rainfall in Philadelphia in August

During the wettest month of the year, an umbrella can be your best friend to stay dry. Historically, August sees about 10 days of rain, with a monthly average of 132 mm (5.2 in). 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 Philadelphia in August

Philadelphia in August gets highs of 30°C (86°F) during the day and drops to 20°C (68°F) at night. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With overnight lows of 20°C (68°F), evenings stay pleasantly warm.

Sunshine in Philadelphia in August

Expect sunny days throughout the month, with an estimated 260 hours of sunshine. This makes it a pleasant time to visit Philadelphia.

Average water temperature in August

At 25°C (77°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.

If you prefer dry days with pleasant temperatures, May typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.