Rossnowlagh Weather in September

Thinking of visiting Rossnowlagh in September? Expect moderate temperatures reaching 17°C (63°F) during the day, dropping to 10°C (50°F) at night, and note that quite a bit of rainfall is likely.

Rainfall in Rossnowlagh in September

You can expect rain on around 22 days based on historical patterns, with 105 mm (4.1 in) average for the month. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.

Temperature in Rossnowlagh in September

Temperatures in Rossnowlagh in September top out at 17°C (63°F) and drop to 10°C (50°F) overnight. The difference between afternoon and evening temperatures is usually noticeable. At 10°C (50°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.

If you prefer dry days with pleasant temperatures, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.