Cobh Weather in September

September in Cobh typically sees daytime highs of 18°C (64°F) and nighttime lows of 12°C (54°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Cobh in September

On average, there are about 17 days with rain during this month, averaging 72 mm (2.8 in). Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.

Temperature in Cobh in September

Daytime temperatures in Cobh reach 18°C (64°F) in September, dropping to 12°C (54°F) at night. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. At 12°C (54°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 Cobh in September

With about 128 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

Wind Speed in Cobh in September

September has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.

Average water temperature in September

The water temperature is 15°C (59°F), chilly, but perfectly fine for a swim if you're not too sensitive to cold water. A short wetsuit can make longer sessions more comfortable.

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