Londonderry Weather in September

In Londonderry, September brings moderate daytime temperatures around 17°C (63°F), with nights cooling to 10°C (50°F). Expect quite a bit of rainfall this month.

Rainfall in Londonderry in September

You can typically expect 21 days of rain this month, averaging around 89 mm (3.5 in). Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.

Temperature in Londonderry in September

If you're visiting Londonderry in September, expect highs of 17°C (63°F) and overnight lows around 10°C (50°F). The difference between afternoon and evening temperatures is usually noticeable. Nights drop to 10°C (50°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Londonderry in September

The area enjoys a moderate level of sunlight, with around 118 hours. It's a good balance between sunny and cloudy days.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, July, August, September and October typically offer the best weather for Londonderry.