Killarney weather in September (Kerry, Ireland)

What can you expect from the weather in Killarney during 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, Killarney generally has moderate temperatures and moderate rainfall. Throughout the daytime, temperatures often hover around 17°C. However, as the sun sets and evening approaches, there's a noticeable cool-down, with temperatures gently dropping to a more temperate 10°C.

Killarney in September usually receives moderate rainfall, averaging around 93 mm for the month. It's the month with the least rainfall. Whether you're keen on hiking, outdoor festivals, or just enjoying a walk in the park, this month provides a reliably dry backdrop for all your plans. Based on our climate data of the past 30 years, about 19 days of rain are anticipated.

The area enjoys a balanced 118 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 typically offers the most optimal weather. In contrast, January, February, April, November and December tend to have less optimal conditions.

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

 

Killarney, monthly averages in September

Min Temperature 10°C  

Max Temperature 17°C  

Chance of Rain 64%  

Precipitation 93 mm  

Rainy days 19 days  

Humidity 77% *  

Sunshine 118 hours *  

Percentage Sunshine 30% *  

* Data from: Valentia, Ireland (52 KM, 32 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 Killarney in September?

For visitors traveling to Killarney, 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.

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

4/10

Outdoor sports

9/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Killarney.

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.