Climate and Average Weather Year Round in Ireland

We show the climate in Ireland by comparing the average weather in 3 representative places: Dublin, Shannon, and Sligo.

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Average High and Low Temperature in Ireland

Average High and Low Temperature in IrelandJanFebMarAprMayJunJulAugSepOctNovDec40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F54386747566446NowNowDublinDublinShannonShannonSligoSligo
The daily average high and low air temperature at 2 meters above the ground.
Dublin 47°F47°F50°F53°F58°F63°F66°F66°F62°F56°F51°F48°F
Shannon 47°F48°F51°F56°F60°F64°F67°F66°F63°F57°F51°F48°F
Sligo 46°F46°F49°F53°F57°F61°F63°F63°F60°F55°F50°F47°F
Dublin 38°F38°F39°F41°F46°F50°F54°F54°F51°F46°F42°F39°F
Shannon 39°F38°F40°F43°F47°F52°F55°F55°F51°F47°F42°F39°F
Sligo 38°F38°F40°F42°F46°F51°F54°F54°F51°F46°F42°F39°F


Average Hourly Temperature in DublinJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowvery coldvery coldcoldcoldcoolvery coldcomfortable


Average Hourly Temperature in ShannonJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowvery coldvery coldvery coldcoldcoldcoolvery coldcomfortable


Average Hourly Temperature in SligoJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowvery coldcoldcoldcool
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Chance of Clearer Skies in Ireland

Chance of Clearer Skies in IrelandJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%51332946NowNowDublinDublinShannonShannonSligoSligo
The percentage of time the sky is clear, mostly clear, or partly cloudy (i.e., less than 60% of the sky is covered by clouds).
Clearer SkiesJanFebMarAprMayJunJulAugSepOctNovDec
Dublin 35%36%38%44%47%48%50%50%47%41%37%35%
Shannon 31%33%35%41%44%46%48%47%44%38%33%30%
Sligo 29%31%33%39%44%44%45%45%43%37%31%29%

Daily Chance of Precipitation in Ireland

Daily Chance of Precipitation in IrelandJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%4226492955NowNowDublinDublinShannonShannonSligoSligo
The percentage of days in which precipitation is observed, excluding trace quantities.
Days of Precip.JanFebMarAprMayJunJulAugSepOctNovDec
Dublin 12.4d9.3d9.4d8.2d8.6d8.1d8.6d8.8d9.2d11.4d11.4d12.1d
Shannon 14.7d11.1d11.2d9.4d9.9d9.5d10.1d10.4d10.2d12.8d13.4d14.0d
Sligo 16.1d12.1d12.6d10.0d10.3d10.2d11.6d12.6d11.7d13.7d14.7d15.8d

Average Monthly Rainfall in Ireland

Average Monthly Rainfall in IrelandJanFebMarAprMayJunJulAugSepOctNovDec2.0 in2.0 in2.5 in2.5 in3.0 in3.0 in3.5 in3.5 in4.0 in4.0 in4.5 in4.5 in3.
The average rainfall accumulated over the course of a sliding 31-day period centered on the day in question.
Dublin 2.7″2.1″1.9″1.7″1.8″1.9″1.7″2.2″2.2″2.9″3.0″2.9″
Shannon 3.5″2.8″2.3″2.0″2.1″2.3″2.2″2.6″2.6″3.3″3.6″3.6″
Sligo 4.0″3.3″2.8″2.2″2.3″2.3″2.5″3.0″3.1″3.8″4.1″4.1″

Hours of Daylight in Ireland

Hours of Daylight in IrelandJanFebMarAprMayJunJulAugSepOctNovDec4 hr4 hr6 hr6 hr8 hr8 hr10 hr10 hr12 hr12 hr14 hr14 hr16 hr16 hr18 hr18 hr20 hr20 hr17.07.5NowNowDublinDublinShannonShannonSligoSligo
The number of hours during which the Sun is at least partly above the horizon.
Dublin 8.2h9.9h12.0h14.1h16.0h16.9h16.4h14.6h12.6h10.5h8.6h7.6h
Shannon 8.3h10.0h12.0h14.1h15.9h16.8h16.2h14.6h12.6h10.5h8.7h7.7h
Sligo 8.0h9.8h12.0h14.2h16.1h17.1h16.5h14.7h12.6h10.4h8.5h7.4h

Chance of Muggy Conditions in Ireland

Chance of Muggy Conditions in IrelandJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%1NowNowDublinDublinShannonShannon
The percentage of time that is muggy, oppressive, or miserable (i.e., a dew point greater than 65°F).
Muggy daysJanFebMarAprMayJunJulAugSepOctNovDec
Dublin 0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d
Shannon 0.0d0.0d0.0d0.0d0.0d0.0d0.1d0.1d0.0d0.0d0.0d0.0d
Sligo 0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d

Average Wind Speed in Ireland

Average Wind Speed in IrelandJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mph17.210.614.811.5NowNowDublinDublinShannonShannonSligoSligo
The average of mean hourly wind speeds at 10 meters above the ground.
Wind Speed (mph)JanFebMarAprMayJunJulAugSepOctNovDec
Dublin 17.015.914.712.711.910.910.811.412.914.515.616.4
Shannon 14.613.913.211.811.510.910.811.011.712.513.214.0
Sligo 16.815.915.113.112.511.911.612.113.314.415.115.9

Average Water Temperature in Ireland

Average Water Temperature in IrelandJanFebMarAprMayJunJulAugSepOctNovDec44°F44°F46°F46°F48°F48°F50°F50°F52°F52°F54°F54°F56°F56°F58°F58°F60°F60°F62°F62°F5946614760NowNowDublinDublinShannonShannonSligoSligo
The daily average wide-area surface water temperature.
Water Temp.JanFebMarAprMayJunJulAugSepOctNovDec
Dublin 48°F46°F46°F47°F50°F54°F57°F58°F58°F56°F54°F51°F
Shannon 48°F47°F47°F49°F52°F56°F59°F60°F59°F56°F53°F50°F
Sligo 48°F47°F47°F48°F52°F55°F58°F60°F58°F56°F53°F50°F

Tourism Score in Ireland

Tourism Score in IrelandJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.
The tourism score, which favors clear, rainless days with perceived temperatures between 65°F and 80°F.

Beach/Pool Score in Ireland

Beach/Pool Score in IrelandJanFebMarAprMayJunJulAugSepOctNovDec002244668810101.1NowNowDublinDublinShannonShannonSligoSligo
The beach/pool score, which favors clear, rainless days with perceived temperatures between 75°F and 90°F.

Growing Season in Ireland

Growing Season in IrelandJanFebMarAprMayJunJulAugSepOctNovDec0%0%20%20%40%40%60%60%80%80%100%100%NowNowDublinDublinShannonShannonSligoSligo
The percentage chance that a given day is within the growing season, defined as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Growing Degree Days in Ireland

Growing Degree Days in IrelandJanFebMarAprMayJunJulAugSepOctNovDec200°F200°F400°F400°F600°F600°F800°F800°F1,000°F1,000°F1,200°F1,200°F1,400°F1,400°F1,600°F1,600°FNowNowDublinDublinShannonShannonSligoSligo
The average growing degree days accumulated over the course of the year, where growing degree days are defined as the integral of warmth above a base temperature (50°F in this case).

Average Daily Incident Shortwave Solar Energy in Ireland

Average Daily Incident Shortwave Solar Energy in IrelandJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh6.00.55.7DublinDublinShannonShannonSligoSligo
The average daily shortwave solar energy reaching the ground per square meter.
Solar Energy (kWh)JanFebMarAprMayJunJulAugSepOctNovDec

This report illustrates the typical weather for Dublin, Shannon, and Sligo year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

The details of the data sources used on this page vary between places and are discussed in detail on each place's dedicated page:


The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

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