Stillorgan weather in September (Dublin County, Ireland)

How is the weather in Stillorgan in September? Wondering if it's an optimal time for a visit? This page provides detailed information on the weather conditions for that month.

In September, Stillorgan generally has moderate temperatures and moderate rainfall. Anticipate daytime temperatures around 17°C, while night temperatures can drop to 11°C.

Stillorgan in September usually receives moderate rainfall, averaging around 78 mm for the month. Typically around 15 days of rainfall is expected.

The area enjoys a balanced 128 hours of sunlight. Ensuring it's neither too overcast nor too sunny.

In case you lean more towards enjoying temperate temperatures and rain-free days June, July and August typically offer the most optimal weather. In contrast, January, February and December tend to have less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Stillorgan climate page with graphs.

 

Stillorgan, monthly averages in September

Min Temperature 11°C  

Max Temperature 17°C  

Water Temperature 15°C *  

Chance of Rain 51%  

Precipitation 78 mm  

Rainy days 15 days  

Humidity 71% *  

Windspeed 14 km/h *  

Sunshine 128 hours *  

Percentage Sunshine 33% *  

* Data from: Dublin, Ireland (16 KM, 10 Miles).

Where to go in Ireland in September

Find out more about the weather in Ireland in September and which places have the best weather conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Stillorgan in September?

For visitors traveling to Stillorgan, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes. With a water temperature of around 15°C there is no need to bring your swimwear.

What To Do

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

Swimming

6/10

Cycling

6/10

Walking

6/10

Camping

8/10

Outdoor sports

9/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Stillorgan.

Our site offers climate and forecast data for every country in the world. Are you going to Ireland? On this website you can find historical weather averages for many cities in Ireland. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.