Duncannon Weather in September

Duncannon in September sees moderate daytime temperatures of 17°C (63°F) and nighttime lows of 12°C (54°F). Rainfall is fairly high this month at around 79 mm (3.1 in), so pack a rain jacket to stay dry.

Rainfall in Duncannon in September

Climate statistics over the past 30 years suggest around 15 days of rain, with 79 mm (3.1 in) average for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Duncannon in September

Expect highs of 17°C (63°F) in Duncannon in September, with nights dropping to around 12°C (54°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to around 12°C (54°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 Duncannon in September

The area enjoys a moderate level of sunlight, with around 144 hours. It's a good balance between sunny and cloudy days.

Should you favor a climate that's both dry and comfortably warm, July and August typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.