Mullion Weather in September

In Mullion, September brings pleasant daytime temperatures around 18°C (64°F), with nights cooling to 14°C (57°F). Expect quite a bit of rainfall this month.

Rainfall in Mullion in September

Rain is expected on roughly 15 days, totalling around 64 mm (2.5 in) for the month. With rain spread across many days but low totals, showers are typically short and light rather than heavy.

Temperature in Mullion in September

Expect highs of 18°C (64°F) in Mullion in September, with nights dropping to around 14°C (57°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. At 14°C (57°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Mullion in September

The area enjoys a moderate level of sunlight, with around 165 hours. It's a good balance between sunny and cloudy days.

If your ideal day consists of dry skies and pleasant temperatures, August typically offers the best circumstances for Mullion.