It would help us if you mentioned WHERE you live. It's not that we're nosey -- it's that the correct answer depends --
My wife and I live in North Central Florida, so Ireland is nearly always 'chilly' for us. Locals tend to think that mildly humid, mid-70's constitutes a HEAT WAVE, that they find almost unbearable.
In June of 2005, our traveling companions hailed from Upstate NY, along the Canadian Border. They walked around in shorts and short-sleeved shirts -- whereas WE required pants, long-sleeved shirts and light jackets!
Rain is ALWAYS a possibility and the best, generic advice is 'Layers' -- but, how heavy those layers are will depend upon what YOU are used to.
The Irish say that the only SURE way to know what the weather is like in September is to wait until October 1st!
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Bob
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As Bob indicated, how you dress in Ireland depends on if you live in a tropical clime or are used to cooler temps. My husband and I traveled to Ireland with some friends from Miami. I have a wonderful photo of them. They are all bundled up in sweaters, heavy coats, hats, gloves and scarves. My husband is sitting beside them wearing shorts and a T-shirt.
I have sympathy for those living in warm places. I lived in Miami for 28 years. On my first trips to Ireland from Miami I froze. Of course this was in the old days when heat was a rarity at B&B and hotels. I live in Atlanta now. Even though it is the deep south we actually have seasons and occasional snow here. My first winter away from Miami was horrible. I thought I would freeze to death. Now I have acclimated to the climate. (You really do!)
When I travel to Ireland now in spring or autumn I don't need the heavy clothing someone from Florida or Hawaii would need. I dress in layers and my heaviest layer is a fleece lined windbreaker with a hood.
Dress is casual in Ireland, so be comfortable. Unless you are staying at castles and dining in their ritzy restaurants you don't need "business" dress. Jeans, sneakers and/or very comfortable walking shoes are perfectly acceptable. It does rain a lot in Ireland so 2 pairs of shoes is a plus (wear one pair on plane and other in bag).
The average September temps are High: 59 Low: 44 Although it can be warmer during the day if the sun shines.
You can email your tour operator or Cabra Castle to ask what their dress code is. I think only the stuffiest ones (Ashford or Dromoland) requires a certain dress code in their fancy restaurants, although I have heard they have loosened it up recently. So get the info from the horse's mouth and you will be prepared.
From memory that last 3 years each September has been lovely and mild. I remember the kids complaining alot about the weather being lovely 18-20 degrees (dont have farenheit conversion )
So true about it depend on where you are coming from. I came back from Thailand to an Irish "heatwave" and had my wool sweater on. It's June in Ireland now and I was cold last night had to put on the home heating oil!
Best to dress in layers that are easy to take on and off. A good warm sweater is vital and get yourself one of those mac in a bag type of raincoats.
My advice to all traveller is don't bring too much! Ireland has plenty of shops if you need to get anything! With airline luggage weight restriction leave your bags as empty as possible as you will load up on gifts and shopping while here.
I see some traveller here in Kerry looking ready to climb Everest when they arrive in Ireland. Bring a light jacket with a hood. Bring one warm sweater and comfy pants. Most people usually put up some weight here after all the good food an drink !
Thank you-this helps. Was planning on one pair of jeans, one pair of corduroys, one pair of leggings, one pair of shorts (optimist I am)...three shirts....one dress.....two pairs of shoes....
A good pair of waterproof shoes should suffice, unless you are planning some MAJOR bog-walking or hikes.
The Mrs. has a pair of low-ankle, 'duck boots' that she bought from LL Bean (I think) and two pairs of light-weight, 'slip on' flats as her 'go-to' foot coverage.
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Bob
Help Us to Help You. The more you tell us about your plans (dates, interests, budget), the better we can tailor our advice to suit!