Weather in Dublin: Climate, Seasons, and Average Monthly Temperature

Dublin weather on a clear day

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Dublin is known for its mild but rainy weather. It is true that Dublin receives quite a fair share of rain, but it is not the coldest or the wettest part of Ireland. (Comedian Hal Roach used to say “You know it's summer in Ireland when the rain gets warmer.”)

In fact, Dublin’s temperate climate makes it a popular destination for visitors throughout the year—it never gets too cold (or too hot). The Irish capital experiences a maritime climate thanks to the influence of the nearby ocean, which means that the winters are manageable but the summers stay cool as well because there are minimal temperature fluctuations. That being said, if you are planning a trip to Dublin, it is always a good idea to be prepared for the rain and to know the best times for avoiding the wettest and coldest weather.

While temperatures are highest in Dublin during the summer, months like August can also be some of the rainiest on average. However, the lowest temperatures and highest average rainfall usually occur during December and January. Given Dublin’s northern European latitude, these are the same months that have the fewest hours of daylight, and the result can be pretty dreary winter days, even if the thermometer stays above freezing.

Regardless of the time of year, it is best to dress in layers and have a waterproof jacket in case the day takes a rainy turn. In order to best prepare for your trip, here is your complete guide to the weather and climate in Dublin.

Fast Climate Facts

  • Hottest Month: July (average mean temperature 60 degrees F/15.6 degrees C)
  • Coldest Month: January (average mean temperature 40.8 degrees F/4.9 degrees C)
  • Wettest Month: October (average monthly rainfall 3.8 inches)
  • Windiest Month: January (average wind speed 18 mph)

Spring in Dublin

In Ireland, spring technically starts in February, though you are unlikely to notice the days getting much warmer or longer until March. April can be one of the mildest and most pleasant months of the year and traditionally has some of the fewest rainy days (an average of just 10, which is positively dry by Dublin standards).

What to pack: Light layers with a lined jacket and waterproof shoes. Jeans are always appropriate and well suited to spring temperatures.

Average Temperatures and Rainfall by Month

  • February: Average high 47 degrees F / Average low 36 degrees F; Average rainfall: 2.66 inches
  • March: Average high 50 degrees F / Average low 37 degrees F; Average rainfall: 2.63 inches
  • April: Average high 54 degrees F / Average low 39 degrees F; Average rainfall: 2.72 inches

Summer in Dublin

Summer brings the largest crowds to Dublin in part because of the better weather that visitors will find in May, June, and July. The highs tend to be in the 60s with lows dipping into the 40s and 50s. The longer days and relatively light rainfall mean that this is also the driest and brightest time to experience the city.

Sun is never a guarantee in Dublin, so all those longer daylight hours may still be filtering in through overcast skies. It is best to pack a light jacket when you are planning to spend time in Dublin, even in the summer. However, you might still spot some truly brave souls swimming in the Liffey or in the sea as part of the Leinster Open Sea activities that are usually scheduled in the later summer months.

What to pack: Breathable cotton clothes are ideal for Dublin summer days but don't forget a light jacket or thick cardigan because the weather can change suddenly when the rain arrives. Umbrellas are still necessary at this time of year.

Average Temperatures and Rainfall by Month

  • May: Average high 59 degrees F / Average low 44 degrees F; Average rainfall: 2.26 inches
  • June: Average high 64 degrees F / Average low 49 degrees F; Average rainfall: 2.15 inches
  • July: Average high 67 degrees F / Average low 52 degrees F; Average rainfall: 2.41 inches

Autumn in Dublin

Irish weather is unpredictable, but this can feel especially true in autumn when Dublin can be sunny and warm (in the high 60s) or stormy and cold (40s). The season can be hard to plan for because the weather tends to change quickly. August is one of the most popular times to travel to the Emerald Isle because of its relatively sunny reputation, but October is Dublin’s rainiest month with an average of nearly 4 inches.

What to pack: Waterproof boots are a must for Autumn in Dublin when some of the rainiest days can occur. After August, be sure to have a warm coat for the evening time.

Average Temperatures and Rainfall by Month

August: Average high 67 degrees F / Average low 52 degrees F; Average rainfall: 2.72 inches

September: Average high 63 degrees F / Average low 49 degrees F; Average rainfall: 2.35 inches

October: Average high 57 degrees F / Average low 45 degrees F; Average rainfall: 3.8 inches

Winter in Dublin

It very rarely snows in Dublin but that is always a slight possibility in winter because the temperature will occasionally drop below freezing. Because of its northern location, daylight hours vary widely by season, and there are very few hours of sun during the winter.

Dublin locals make do with the dark, cold, and wet weather by spending more time at festivals like the Dublin Book Festival (November) or Temple Bar Tradfest (January). The short daylight hours also mean more nights spent in a cozy corner of the pub.

Winter brings the smallest crowds to Dublin and the city goes on about its business despite the rain. Hotel prices are also lower at this time of year (with the exception of the week around Christmas and New Year’s Eve), which can make it a tempting time to visit even as the temperature hits its lowest point, hovering in the 40s most days.

What to pack: Bring a warm jacket, hat and a scarf for your winter trip. Boots will keep your feet dry on the wettest days of the year.

Average Temperatures and Rainfall by Month

  • November: Average high 51 degrees F / Average low 39 degrees F; Average rainfall: 3.27 inches
  • December: Average high 47 degrees F / Average low 36 degrees F; Average rainfall: 3.68 inches
  • January: Average high 46 degrees F / Average low 35 degrees F; Average rainfall: 3.56 inches

Average Monthly Temperature, Rainfall, and Daylight Hours

  • January: 46°F / 35°F; 3.56 inches; 7.5 hours
  • February: 47°F / 36°F; 2.66 inches; 9 hours
  • March: 50°F / 37°F; 2.63 inches; 11 hours
  • April: 54°F/ 39°F; 2.72 inches; 13.5 hours
  • May: 59°F / 44°F; 2.26 inches; 15.5 hours
  • June: 64°F / 49°F; 2.15 inches; 17 hours
  • July: 67°F / 52°F; 2.41 inches; 16 hours
  • August: 67°F / 52°F; 2.72 inches; 14.5 hours
  • September: 63°F / 49°F; 2.35 inches; 12.5 hours
  • October: 57°F / 45°F; 3.8 inches; 10.5 hours
  • November: 51°F / 39°F; 3.27 inches; 8.5 hours
  • December: 47°F / 36° F; 3.68 inches; 7 hours