Ireland in September is, in my opinion, hard to beat. In fact, it’s up there as one of the best times to visit Ireland.
The days are still nice and long (the sun rises from 06:41 at the start of the month and sets at 20:14) and the weather is nice and mild, with average highs of 13°C.
However, spending September in Ireland does come with its pros and cons, as you’ll discover below.
You’ll also find info on everything from the weather in Ireland in September to things to do and more useful info. Dive on in!
Some quick need-to-knows before visiting Ireland in September
Although visiting Ireland in September is nice and straightforward, there are some need-to-knows that’ll make your visit that bit more enjoyable.
Below, you’ll find info on the weather in Ireland during this month along with some handy info to get you up to speed.
1. The weather
The weather in Ireland in September, as is the case with every month in Ireland, can be unpredictable. Average high temperatures in Ireland in September tend to hover around 13°C and average lows tend to sit at 9°C.
2. Long days
At the beginning of the month, the sun rises at 06:41 and it sets at 20:14. This means you’ve around 12.5 hours of daylight to explore, which makes planning your Ireland itinerary much easier.
3. It’s quieter
September is autumn in Ireland, which means the school year has resumed and many of the tourists that will have visited during peak season will have flown home.
4. Plenty to see and do
The long days and the usually good weather means you’ve your pick of indoor and outdoor activities. There’s endless things to do in Ireland in September, as you’ll find out below.
5. Make an informed decision
Picking when to visit Ireland isn’t easy, and there’s a lot to consider, so it’s well worth spending a little bit of time comparing what it’s like in Ireland during the other months of the year, when you have a second:
- Ireland in January
- Ireland in February
- Ireland in March
- Ireland in April
- Ireland in May
- Ireland in June
- Ireland in July
- Ireland in August
- Ireland in October
- Ireland in November
- Ireland in December
The pros and cons of spending September in Ireland
There are some pros and cons (not many!) to visiting Ireland in September. However, unlike some months (I’m looking at you, January!), the pros greatly outweigh the cons.
Below, you’ll find the pros and cons from the perspective of someone that’s spent the last 32 Septembers in Ireland:
- Weather: We tend to have good weather in September, with average highs of 13°C and lows of 9°C
- Long days: As we’re just out of summer, the days are still nice and long, with the sun rising at 06:41 and setting at 20:14 at the start of the month
- It’s quieter: The beauty of visiting just after summer is that you’ll still have good weather and places will be much quieter as peak-season is behind us
- Festivals: Loads of Irish music festivals and food, and cultural events take place (see our Irish festivals calendar)
- Prices: Flights and accommodation will still be relatively high in comparison to autumn and winter
What to expect from the weather in Ireland in September
The weather in Ireland in September is a bit of a mixed bag, but it’s generally pretty good.
Here’s what the weathers been like during previous years. Note: this data comes from MET Eireann, Ireland’s Meteorological Service
- The weather in Ireland in September 2021 was warm, dry for most and dull with some parts of the country recording record breaking temperatures for the month
- The number of days where rain fell ranged from ranged from 8 days (Phoenix Park in Dublin to 23 days at Valentia Island in Kerry)
- The average temperature for the month ranged between 14.3 °C to 15.5 °C
- The weather in Ireland in September 2020 saw a warm first two thirds of the month and a cool final third. It was wet in the Northwest and dry in the South
- The number of days when rain fell ranged from 11 days (Roche’s Point in Cork) to 23 days (Newport in Mayo)
- The average temperature for the month ranged between 12.8 °C and 13.7 °C
Average temperature in Ireland in September
The average temperature in Ireland in September brings average highs of 13 °C and average lows of 9 °C.
Those from colder temperate climates will find the temperature in Ireland in September mild, while those who come from more tropical climates should find September in Ireland to be cold.
The average temperature in previous years
- 2021: 14.8 °C
- 2020: 13 °C
- 2019: 12.8 °C
Things to do in Ireland in September
Many people planning a trip to Ireland tend to opt for September as the days are long and there’s plenty of time to explore.
If you’re on the hunt for things to do in Ireland in September, dive into our counties in Ireland section – it’s packed with the best places to visit in every county! Here are some suggestions to get you started:
1. Take a well planned road trip
Yes, the days are long in Ireland in September, but you need a well thought out plan of action to make the most of your time.
2. Walks galore
One of the more popular things to do in Ireland in September when the weathers fine is to explore on foot. Luckily, there’s endless walks in Ireland to try.
From hiking the highest mountain in Ireland to more gentle trails, there’s something to suit every fitness level.
3. The ‘old reliables’
Although these popular attractions will still be busy, they’ll be much quieter than the summer season.
4. Hidden gems
However, if you can, try and carve out a bit of time to visit some of the more unique places to visit in Ireland, that tourists often miss.
5. Visiting Dublin in September
There’s endless things to do in Dublin in September if you’re visiting for a bit of a city break. If the weather’s fine, try one of the many walks in Dublin.
What to pack / what to wear in Ireland in September
Packing for September in Ireland is nice and straightforward once you’ve an idea of what to bring with you.
If you’re planning an active trip, bring your usual active wear. If you plan on eating out or visiting pubs, smart casual is more than enough.
- Sun cream (yep, really… well, OK – hopefully!)
- Comfy shorts and light trousers for walking about in
- A waterproof jacket (a light one that folds up into a pouch can come in handy)
- T-shirts or some light tops for the warmer days
- Causal clothes for wearing in the evening (pubs in Ireland are fairly relaxed)
FAQs about spending September in Ireland
We’ve had a lot of questions over the years asking about everything from ‘What should I pack for Ireland in September?’ (see above) to ‘Is Ireland Green in September?’ (it is).
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.
Is September a good time to go to Ireland?
Yes. Peak-season has just ended, the days are long (sun rises at 06:41 and it sets at 20:14 at the beginning of the month) and we get average highs of 13°C and lows of 9°C.
Does it rain a lot in Ireland in September?
It can do. For example, last year, the number of days where rain fell ranged from ranged from 8 days to 23 days (see guide above for more info).
Are there many things to do in Ireland in September?
There’s endless things to do in Ireland in September, thanks to the long days, from hikes and walks to tours, museums and scenic drives.
Howaya! Thanks for visiting the Irish road trip! This site exists to inspire and guide you on an Irish adventure that’ll give birth to a lifetime of memories (sounds very arsey altogether, I know!).