This is a straightforward Dublin weather by month guide.
It presents data from Met Eireann (the Irish Meteorological Service) in a clear manner that’s easy to browse.
If you’re planning a trip to Ireland and you’re trying to figure out the best time to travel to Dublin, the guide below will help.
After browsing it, you’ll very likely be able to rule and rule out some months nice and quickly. Enjoy!
Some quick need-to-knows about the weather in Dublin
Before diving into our Dublin weather by month guide, take some time to read the bullet points below, as they’ll get you up-to-speed quickly:
1. The seasons
Winter in Ireland starts on December 1st and ends on February 28th. Spring in Ireland starts on March 1st and ends on May 31st. Summer in Ireland starts on June 1st and ends on August 31st. Autumn in Ireland starts on September 1st and ends on November 31st.
2. The Dublin climate
The Dublin climate is temperate. We experience mild summers and reasonably mild winters. However, there are exceptions – we’ve had many heatwaves in the past (30°C / 86°F) and freezing cold winters.
3. Average temperatures
Below, you’ll find the LTAs (Long Term Averages) for both temperature and rainfall. This will give you a quick sense of how each month stacks up over time.
4. It’s unpredictable
Any Dublin weather by month guide that tells you it’ll be dry and sunny one month and cold and wet the next is misleading you. The weather in Dublin is notoriously unpredictable.
5. Prepare for four seasons in one day
You’ll often hear people say that the weather in Dublin is so changeable that we get four seasons in a day and it is, at times, true. When you’re planning your Ireland itinerary, plan for every kind of weather (see what to wear in Ireland for more info).
6. The best and worst weather
The best weather in Dublin by month tends to be June, July and August, while the worst tends to be January and February, but stormy weather can hit at any time, as it has in the past.
Dublin temperature by month: A speedy overview
This section of our guide will give you an insight into the best time to visit Dublin from a weather perspective.
Each table below contains the average temperatures for each month with data taken from the Irish Meteorological Service.
I’ve popped in several different years so you can get a sense of the weather in Dublin over a period of time.
The final column of each table contains the Long Term Average temperature for the month in question.
Summer (June, July and August)
| Month | 2022 | 2021 | 2020 | LTA |
|---|---|---|---|---|
| June | 13.6°C/56.48°F | 13.7°C/56.66°F | 13.4°C/56.12°F | 13.4°C/56.12°F |
| July | 16.3°C/61.34°F | 16.1°C/60.98°F | 14.4°C/57.92°F | 15.4°C/59.72°F |
| August | 15.9°C/60.62°F | 14.7°C/58.46°F | 14.7°C/58.46°F | 15.1°C/59.18°F |
Autumn (September, October and November)
| Month | 2022 | 2021 | 2020 | LTA |
|---|---|---|---|---|
| September | 13°C/55.4°F | 14.7°C/58.46°F | 12.8°C/55.04°F | 13.1°C/55.58°F |
| October | 12°C/53.6°F | 11.9°C/53.42°F | 9.5°C/49.1°F | 10.3°C/50.54°F |
| November | 8.8°C/47.84°F | 7.6°C/45.68°F | 8.2°C/46.76°F | 7.3°C/45.14°F |
Winter (December, January and February)
| Month | 2022 | 2021 | 2020 | LTA |
|---|---|---|---|---|
| December | 4.4°C/39.92°F | 6.5°C/43.7°F | 4.9°C/40.82°F | 5.6°C/42.08°F |
| January | 5.4°C/41.72°F | 3.9°C/39.02°F | 6.3°C/43.34°F | 5.3°C/41.54°F |
| February | 6.7°C/44.06°F | 6.2°C/43.16°F | 5.8°C/42.44°F | 5.3°C/41.54°F |
Spring (March, April and May)
| Month | 2022 | 2021 | 2020 | LTA |
|---|---|---|---|---|
| March | 6.6°C/43.88°F | 7.2°C/44.96°F | 5.8°C/42.44°F | 6.7°C/44.06°F |
| April | 7.6°C/45.68°F | 5.6°C/42.08°F | 8.5°C/47.3°F | 8.1°C/46.58°F |
| May | 11.9°C/53.42°F | 9.2°C/48.56°F | 10.9°C/51.62°F | 10.7°C/51.26°F |
Dublin weather by month: Temperatures, rainfall and handy info
The next section of our Dublin weather by month guide takes a look at each of the months of the year and gives you info on temperature, rainfall and more.
Remember, the Dublin climate means that we usually get mild winters and summers, but what one person calls ‘mild’ another might regard as ‘chilly’.
January
Dublin in January is peak winter and the days tends to be cool, wet and windy.
The LTA (Long Term Average) temperature in Dublin in January is 5.3°C/41.54°F with average rainfall of 62.6mm.
One of the biggest drawback of January is the daylight hours.
The sun rises (at the start of the month) at around 08:29 and sets at around 16:38 each day.
February
Dublin in February sees the days lengthen slightly, with the sun rising (at the start of the month) at 07:40 and setting at 17:37.
The LTA (Long Term Average) temperature in Dublin in February is 5.3°C/41.54°F.
The LTA rainfall for Dublin in February measures at 48.8mm.
March
It’s from March that our Dublin weather by month guide starts to see some real improvements, as spring has (finally!) arrived.
Dublin in March has a LTA (Long Term Average) temperature in Dublin in March is 6.7°C/44.06°F.
In the past, however, we’ve had some toasty heatwaves during this month. The LTA rainfall for Dublin in March measures at 52.6mm.
April
April in Dublin is when things really starts to pick up with the weather in Ireland as a whole starting to take a turn for the better.
The LTA (Long Term Average) temperature in Dublin in April is 8.1°C/46.58°F with rainfall of 54.11mm.
Keep in mind that, as it gets closer to May, temperatures rise. April also brings long, lovely days with it, with the sun rising from 06:23 and setting at 20:00 from mid-April.
May
Dublin in May is a mighty time to explore, with the sun rising at 05:17 and setting at 21:26 (mid-May).
It also tends to be nice and mild with the LTA (Long Term Average) temperature in Dublin in May coming in at a mild 10.7°C/51.26°F.
Rainfall wise, the LTA for May is 59.5mm – a slight improvement from 54.11mm the previous month.
June
It’s from June that our Dublin weather by month guide starts to heat up, as June 1st marks the arrival of the summer season (see our full June in Dublin guide)!
Now, summers in Dublin can be a mixed bag; last year, for example, we had a heatwave with numerous 30°C+ days.
The Long Term Average temperature in Dublin in June is 13.4°C/56.12°F with rainfall measuring 66.7mm.
The days are long (the sun rises at 05:03 and sets at 21:42) which will suit those of you looking to tackle the many things to do in Dublin.
July
Dublin in July is another great month… usually. July 2023 was an absolute washout for the most part.
The Long Term average temperature in Dublin in July is 15.4°C/59.72°F with rainfall measuring 56.2mm.
At the start of the month, the sun rises at 05:01 and sets at 21:56, giving you plenty of time to explore.
August
Dublin in August is also one of the more popular times to explore. In years past, we’ve had storms in August and we’ve had heatwaves.
The LTA (Long Term Average) temperature in Dublin in August 15.1°C/59.18°F with rainfall measuring 73.3mm.
The days are also nice and long, with the sun rising at 05:41 and setting at 21:20. Schools tend to start again towards the end of the month.
September
Dublin in September is what’s known as the ‘Shoulder Season’ – i.e. the period of time between the peak-season and the off-season.
The LTA (Long Term Average) temperature in Dublin in September 13.1°C/55.58°F with rainfall measuring 59.5mm.
The days are still nice and long with the sun rising at 06:41 and it setting at 20:14 at the beginning of the month.
October
The weather in October in Dublin tends to be OK with a LTA (Long Term Average) temperature in Dublin in October coming in at 10.3°C/50.54°F.
The weather during this month is generally cool and crisp with rainfall measuring 79.0mm (up from 59.5mm in September).
This is the first time in our Dublin weather by month guide that you’ll see the days really start to shorten, with the sun rising at 07:33 and setting at 19:09.
November
November in Dublin marks the beginning of the off-season. The weather is cool and crisp and the LTA (Long Term Average) temperature in Dublin in November 7.3°C/45.14°F.
The LTA rainy weather doesn’t jump much this month with rainfall measuring 72.9mm.
The days are also dramatically shorter than previous months, with the sun rising at 07:29 and setting at 17:00.
December
The weather in Dublin in December is wintery but do note that it’s rare that Dublin will get snow during December on lower grounds.
Several Christmas markets in Dublin take place including the Dublin Castle Christmas Market.
The LTA (Long Term Average) temperature in Dublin in December is 5.6°C/42.08°F with rainfall measuring 72.7mm.
Daylight hours in December are reduced, also, with the sun rising at 08:22 and setting at 16:19.
FAQs about the best weather in Dublin by month
We’ve had a lot of questions over the years asking about everything from ‘What is the best temperature in Dublin by month?’ to ‘Which month has the least rain?’.
In the section below, we’ve popped in the most FAQs that we’ve received. If you have a question that we haven’t tackled, ask away in the comments section below.
What is the best month of weather in Dublin?
If we look at both rainfall and the Dublin temperature by month, the best month to visit the capital is July as it has the highest Long Term Average temperature (15.4°C/59.72°F) and rainfall measuring 56.2mm/2.2 inches.
What is the coldest month in Dublin?
If we look at the LTAs (Long Term Averages) the coldest months in Dublin are January and February, both of which have a LTA of 5.3°C/41.72°F.
What is the most rainy month in Dublin?
If we look at Long Term Averages provided by the Irish Meteorological Service, it’s clear that the rainiest month in Dublin, with rainfall measuring 79.0mm/3.1 inches.
Which month does it snow in Dublin?
According to Met Eireann, the Irish Meteorological Service, January and February are the months where snow in Dublin is most common. Snow generally falls on higher ground, like in the Dublin Mountains.
Keith O’Hara has lived in Ireland for 35 years and has spent much of the last 13 creating what is now The Irish Road Trip guide. Over the years, the website has published thousands of meticulously researched Ireland travel guides, welcoming 40 million+ visitors along the way. In 2022, the Irish Road Trip team published the world’s largest collection of Irish Road Trip itineraries. Keith lives in Dublin with his dog Toby and finds writing in the 3rd person minus craic altogether.