Gretna Weather in September

September in Gretna averages 17°C (63°F) during the day and 9°C (48°F) at night. Quite a bit of rainfall is typical this month, with around 80 mm (3.1 in) on average. An umbrella is a good idea.

Rainfall in Gretna in September

Historically, the month has about 18 days of rain, averaging 80 mm (3.1 in) in total. Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.

Temperature in Gretna in September

Gretna in September gets highs of 17°C (63°F) during the day and drops to 9°C (48°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. At 9°C (48°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

Sunshine in Gretna in September

The month is characterized by fewer sunny days, with roughly 95 hours hours of sunshine. Ideal for those who prefer a cooler, cloudier climate.

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.