We get emails with the subject line ‘Ireland weather by month’ on an almost weekly basis.
If you’re one of those people – chill! The guide below will give you a speedy overview of the seasons in Ireland and what to expect from each month.
Below, you’ll find average temperatures in Ireland, what to expect from each month and more. Dive on in!
Some quick need-to-knows about the weather in Ireland
Before diving into our Ireland 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 climate
The climate of Ireland 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° Fahrenheit) and freezing cold winters.
3. It’s unpredictable
Any Ireland 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 Ireland is notoriously unpredictable.
4. Prepare for four seasons in one day
You’ll often hear people say that the weather in Ireland 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.
5. The best and worst weather
The best weather in Ireland 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.
Ireland temperature by month: A speedy overview
Below, you’ll find some Ireland temperature by month tables that offer an overview of the average temperature in Ireland across several different locations for each month of the year.
A quick glance below will give you a sense of what to expect from the different seasons in Ireland. We’ll break down each month in the following section.
Winter in Ireland
|Killarney||6 °C/42.9 °F||5.5 °C/42 °F||5.5 °C/42 °F|
|Dublin||4.8 °C/40.6 °F||4.7 °C/40.5 °F||4.8 °C/40.6 °F|
|Cobh||7.1 °C/44.8 °F||6.5 °C/43.8 °F||6.4 °C/43.5 °F|
|Galway||5.9 °C/42.5 °F||5.8 °C/42.5 °F||5.9 °C/42.5 °F|
Spring in Ireland
|Killarney||5.5 °C/42 °F||8.4 °C/47.1 °F||11 °C/51.9 °|
|Dublin||3 °C/37.4 °F||4.8 °C/40.6 °F||7.6 °C/45.6 °F|
|Cobh||7.1 °C/44.8 °F||8.8 °C/47.9 °F||11.4 °C/52.5 °F|
|Galway||6.9 °C/44.4 °F||8.9 °C/48 °F||11.6 °C/52.9 °F|
Summer in Ireland
|Killarney||13.5 °C/56.3 °F||14.9 °C/58.7 °F||14.5 °C/58.2 °F|
|Dublin||13.5 °C/56.4 °F||15.2 °C/59.3 °F||14.8 °C/58.6 °F|
|Cobh||15.4 °C/59.7 °F||15.6 °C/60.1 °F||15.4 °C/59.7 °F|
|Galway||14 °C/57.2 °F||15.3 °C/59.5 °F||15 °C/58.9 °F|
Autumn in Ireland
|Killarney||13.2 °C/55.7 °F||10.6 °C/51 °F||7.5 °C/45.6 °F|
|Dublin||13.1 °C/ 55.5 °F||10.3 °C/ 50.5 °F||7 °C/ 44.6 °F|
|Cobh||14 °C/ 57.3 °F||11.6 °C/52.8 °F||8.6 °C/47.4 °F|
|Galway||13.6 °C/56.4 °F||10.8 °C/51.5 °F||7.9 °C/46.2 °F|
Ireland weather by month: Temperatures, rainfall and handy info
The next section of our Ireland 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 climate of Ireland means that we usually get mild winters and summers, but what one person calls ‘mild’ another might regard as ‘chilly’.
Ireland in January is peak winter and the days tends to be cool, wet and windy with an average temperature of 7° C. 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. Ireland can also get quite a bit of rain in January.
In 2021, for example, some parts of Ireland (parts of Cork) recorded 15 days of rain while others (parts of Mayo) recorded 29.
Ireland 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.
Temperature wise, Ireland gets average highs of 8°C and average lows of 2°C in February – so not much different than January.
In terms of rainfall, February is still a mixed bag. In 2021, for example, rain fell between 17 (Malin Head) and 25 (Roche’s Point) days.
It’s from March that our Ireland weather by month guide starts to see some real improvements, as spring has (finally!) arrived.
Ireland in March tends to experience average highs of 10°C+ and average lows of around 4.4°C (again, keep in mind that this can change drastically).
In 2021, rain fell between 11 (parts of Wexford) and 25 (Belmullet in Mayo) days of the month.
Ireland in April is when the warmer weather starts to seep in, and the island experiences average high temperatures of 13°C and average lows of 4°C.
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.
Rain wise, in 2021, the number of days where rain fell ranged from 8 days (at Johnstown Castle) to 17 days (in Belmullet)
Ireland 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 mean temperatures ranging between 9.0°C and 13.0°C over the last three years.
In 2021, the number of days where rain fell ranged from 16 (Phoenix Park in Dublin) to 24 days (on Valentia Island in Kerry)
It’s from June that our Ireland weather by month guide starts to heat up, as June 1st marks the arrival of the summer season!
Now, summers in Ireland can be a mixed bag; last year, for example, we had a heatwave with numerous 30°C+ days.
In Ireland in June, the average high temperature can rise to a balmy 18°C, while the average lows tend to hover around 11.6°C.
The days are long (the sun rises at 05:03 and sets at 21:42) and, in 2021, rain fell between 6 days (at the Phoenix Park in Dublin) to 17 days in several parts of the country
Ireland in July experiences average high temperature of 19°C and lows that tend to hover around 12°C.
At the start of the month, the sun rises at 05:01 and sets at 21:56, giving you plenty of time to explore.
July tends to be a good month weather wise, although we can get a bit of rain. In 2021, for example, the number of days where rain fell ranged from 9 days (Phoenix Park in Dublin) to 17 days (several parts of the country)
Ireland 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 average high temperatures in Ireland during this month are 18°C, while the average lows tend to hover around 11°C.
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.
Ireland 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 average high temperatures during this month tend to hover around 13°C and average lows tend to sit at 9°C.
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.
As far as rainfall goes, the number of days where rain fell ranged from 8 days to 23 days in 2021.
The weather in Ireland in October tends to be OK (in 2021 it was mild and wet while in 2020 is was cool, wet and windy).
We get average high temperatures can rise to a mild 13°C, while average lows tend to hover around 6°C.
This is the first time in our Ireland 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.
Ireland in November marks the beginning of the off-season in Ireland, and we tend to experience average temperatures between 11°C and 6.2°C across the island.
The days are also dramatically shorter than previous months, with the sun rising at 07:29 and setting at 17:00.
Rainfall wise, we saw between 9 and 28 days in 2021 and between 18 and 26 days in 2020.
The average temperature tends to hover at 8°C, with average highs of 10°C and average lows of 3°C.
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 Ireland by month
We’ve had a lot of questions over the years asking about everything from ‘What is the best temperature in Ireland 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 for weather in Ireland?
The best weather in Ireland by month is hard to pinpoint, as every year is different. However, in my opinion, the summer months and September are good choices.
What are the seasons in Ireland?
Winter runs from December 1st to February 28th. Spring runs from March 1st to May 31st. Summer runs from June 1st to August 31st. Autumn runs from September 1st to November 31st.
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