Willow Grove Weather in September

September in Willow Grove averages 25°C (77°F) during the day and 15°C (59°F) at night. Quite a bit of rainfall is typical this month, with around 109 mm (4.3 in) on average. An umbrella is a good idea.

Rainfall in Willow Grove in September

Records from the past 30 years suggest around 9 days of rain, with 109 mm (4.3 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 Willow Grove in September

Daytime temperatures in Willow Grove reach 25°C (77°F) in September, dropping to 15°C (59°F) at night. Conditions stay fairly consistent through the month, making it easier to plan what to wear. With overnight lows of 15°C (59°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Willow Grove in September

There are approximately 218 hours of sunshine this month, resulting in mostly clear days.

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 Willow Grove.