Dumbarton Weather in September

September in Dumbarton brings moderate temperatures, with daytime highs of 17°C (63°F) and nights around 9°C (48°F). Quite a bit of rainfall is expected, around 116 mm (4.6 in), so pack an umbrella.

Rainfall in Dumbarton in September

Historically, approximately 20 days this month are expected to have rain, averaging 116 mm (4.6 in). Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.

Temperature in Dumbarton in September

In September, expect moderate temperatures in Dumbarton, with highs of 17°C (63°F) and lows of 9°C (48°F) at night. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows around 9°C (48°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Dumbarton in September

The month brings about 117 hours of sunlight, offering a comfortable mix of sun and overcast.

If your ideal day consists of dry skies and pleasant temperatures, May, July and August typically offer the best circumstances for Dumbarton.