Tallaght Weather in September

In Tallaght, September brings moderate daytime temperatures around 18°C (64°F), with nights cooling to 10°C (50°F). Expect quite a bit of rainfall this month.

Rainfall in Tallaght in September

Looking at the last 30 years, the data shows about 16 days with rain, averaging 75 mm (3 in) for the month. With rain spread across many days but low totals, showers are typically short and light rather than heavy.

Temperature in Tallaght in September

Expect highs of 18°C (64°F) in Tallaght in September, with nights dropping to around 10°C (50°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to around 10°C (50°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Tallaght in September

The area experiences a moderate amount of sunshine, with approximately 128 hours of sunlight expected. This means a decent mix of sun and overcast.

Wind Speed in Tallaght in September

In September, average wind speeds reach 4 m/s (8 knots), leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.

Average water temperature in September

With water at 15°C (59°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.

For Tallaght itself, July and August generally stand out with 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.