Stillorgan Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Stillorgan.
Climate overview of Stillorgan
Stillorgan, Dublin County, Ireland, experiences moderate temperature changes through the seasons. July is the warmest month with daytime highs of 19°C (66°F), while February is the coolest at 9°C (48°F).
With around 941 mm (37 in) of annual rainfall, the city has moderate precipitation levels. November is the wettest month and March the driest. The most sunshine falls in May, with an average of 6.3 hours of daily sunshine.
Stillorgan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Stillorgan — and find the best time to visit.
Monthly Temperature in Stillorgan
The climate in Stillorgan experiences moderate temperature changes, with mild shifts between seasons. Typically, average maximum daytime temperatures range from a pleasant 19°C (66°F) in July to a chilly 9°C (48°F) in the coolest month, February.
Nights vary from 13°C (55°F) in July to around 4°C (39°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Stillorgan
Generally, Stillorgan has a moderate amount of precipitation, averaging 941 mm (37 in) of rainfall annually. Precipitation levels in Stillorgan remain relatively steady throughout the year. November has the most rain, with 93 mm (3.7 in) over 16 days. In the driest month March, this drops slightly to 65 mm (2.6 in), making the city's climate fairly predictable. For more details, please visit our Stillorgan Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Stillorgan
For those who appreciate different seasons, Stillorgan serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 6.3 hours of sunshine daily, and embrace the darker days in December, offering only 1.7 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Stillorgan
The mean water temperature over the year ranges from 8°C (46°F) in March to 15°C (59°F) in August.
Water temperature over the year
Humidity in Stillorgan by Month
The relative humidity is high throughout the year in Stillorgan.
The city experiences its highest humidity in December, reaching 83%. In April, the humidity drops to its lowest level at 68%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Stillorgan
The mean wind speed over the year ranges from 4 m/s (8 knots) in May, June, July, August and September to 6 m/s (12 knots) in January, February, March and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Stillorgan
Rainfall during this time ranges from 78 mm (3.1 in) in September to 84 mm (3.3 in) in August. This means you can expect a mix of sunny days and occasional showers. Ready to plan your travels but need destination ideas? Our smart tool recommends places based on the climate conditions you prefer. Start planning with our destination weather tool.
Frequently asked questions about the climate in Stillorgan
What is the best time to visit Stillorgan?
June, July and August typically offer the most optimal weather in Stillorgan. In contrast, January, February and December tend to have less optimal conditions.
What temperatures can I expect in Stillorgan?
Daytime highs range from 9°C (48°F) in February to 19°C (66°F) in July. Nighttime lows range from 4°C (39°F) to 13°C (55°F).
How much rain does Stillorgan get?
Annual rainfall is around 941 mm (37 in). November is the wettest month with 93 mm (3.7 in), while March is the driest with 65 mm (2.6 in).
How sunny is Stillorgan?
Stillorgan receives around 1,432 hours of sunshine per year. May is the sunniest month with 188 hours, while December is the cloudiest with just 51 hours.
Stillorgan 3-Day Forecast
Stillorgan 3-Day Forecast
Stillorgan on the map
Stillorgan is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
Cork
19°C (66°F) Kilkenny
20°C (68°F) Dublin20°C (68°F) Kenmare
19°C (66°F) Galway20°C (68°F) Killarney19°C (66°F) Westport19°C (66°F) Doolin18°C (64°F) 
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