Dublin Weather in September

During September, Dublin experiences moderate daytime temperatures of 18°C (64°F) and cooler nights around 11°C (52°F). Expect quite a bit of rainfall. Around 74 mm (2.9 in) is typical.

Rainfall in Dublin in September

Typically, about 15 days will experience rainfall, with an average of 74 mm (2.9 in) for the month. Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.

Temperature in Dublin in September

In September, Dublin sees moderate temperatures, with highs of 18°C (64°F). Nights drop to around 11°C (52°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 11°C (52°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Dublin 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 Dublin in September

September sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

Average water temperature in September

At 15°C (59°F), the water is cool but manageable for those who don't mind a bit of a shock getting in. Most people adjust after a few minutes.

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.