September weather forecast
Dublin, Ireland

Dublin in September witnesses a gradual descent in temperature, indicating the onset of the autumn season. Yet, the sea maintains a comfortable 14.8°C (58.6°F) that blends seamlessly with the cooling air. As mildness infuses the air, the city changes hue, shrugging on the colors of fall. The days, while beginning to shorten, are still bathed in an appreciable amount of sunlight. Despite the declining temperatures, Dublin sustains its enchanting atmosphere as it embraces the seasonal transition.

Temperature

The introduction of September sees an average high-temperature of a still comfortable 17.3°C (63.1°F), hardly deviating from August. The average temperature in Dublin during September nights dips to a fresh 11.4°C (52.5°F).

Rainfall

In Dublin, during September, the rain falls for 9 days and regularly aggregates up to 57mm (2.24") of precipitation. In Dublin, during the entire year, the rain falls for 128 days and collects up to 714mm (28.11") of precipitation.

Sea temperature

In Dublin, in September, the average water temperature is 14.8°C (58.6°F).
Note: You can swim in 14.8°C (58.6°F) below 10°C (50°F) with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. A short span at 13°C (55.4°F) without it is tough.

Daylight

The average length of the day in September is 12h and 41min.
On the first day of the month, sunrise is at 6:35 am and sunset at 8:14 pm. On the last day of September, in Dublin, Ireland, sunrise is at 7:25 am and sunset at 7:03 pm IST.

Sunshine

In September, the average sunshine is 4.3h.

UV index

The average daily maximum UV index in September in Dublin, Ireland, is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.
Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.