Howth Weather in September

September in Howth sees daytime temperatures around 17°C (63°F) and lows of 12°C (54°F) at night. With around 82 mm (3.2 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Howth in September

This month experiences about 15 days of rain according to historical data, averaging 82 mm (3.2 in). A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Howth in September

In September, Howth gets moderate temperatures, with highs of 17°C (63°F). Nights cool to around 12°C (54°F). The month of September belongs to the summer season. 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 Howth in September

You can expect a moderate amount of sunlight, with approximately 128 hours. This means a pleasant mix of sun and overcast.

Wind Speed in Howth 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.

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.

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For a detailed overview over the year and the best time to visit Ireland, check out our Howth's climate page.

Howth Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 17°C (63°F)  

Water Temperature 15°C (59°F) *  

Chance of Rain 50%  

Precipitation 82 mm (3.2 in)  

Rainy days 15 days  

Humidity 71% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 128 hours *  

Percentage Sunshine 33% *  

* Data from: Dublin, Ireland (13 KM, 8 Miles).

What to Wear in Howth in September

For Howth in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Expect water temperatures of around 15°C (59°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Howth in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

6/10

Walking

6/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Ireland, check out our Howth's climate page.

More climate data for Howth

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Howth climate overview or explore weather in Ireland.