Dublin weather is basically a mood ring for the North Atlantic. If you’ve spent more than twenty minutes in the city today, Saturday, January 17, 2026, you already know the deal. It’s 42°F right now, and honestly, the "clear with periodic clouds" description on the apps doesn’t do justice to that damp, 95% humidity chill that settles right into your bones.
People always talk about the rain, but the real story is the light. Or the lack of it. We're looking at a UV index of zero today. Basically, the sun is just a theoretical concept at this point in January.
Decoding the 10 Weather Forecast Dublin Trends
If you’re trying to plan your life around the next week and a half, don't just look at the little icons. You’ve got to read between the lines. Sunday, January 18, is looking like the "best" of a mediocre bunch. We’re hitting a high of 47°F, which is basically tropical for a Dublin winter. It’ll be mostly cloudy, but with only a 20% chance of rain during the day, it’s your best window for a walk in St. Stephen's Green before the real Atlantic mess arrives.
Monday is when things get kinda interesting. Or annoying, depending on your commute. We’re expecting light rain with a high of 45°F, but the night brings a 25% chance of snow as temperatures dip to 38°F. Don't get your hopes up for a winter wonderland, though. In Dublin, "snow" usually means "slightly crunchy rain" that melts the second it hits the pavement.
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The Mid-Week Washout
Tuesday and Wednesday (January 20-21) are the days you’ll want to stay inside. We’re talking about a 45% chance of rain both days, but the wind is the real kicker. It’s jumping from a gentle 5-7 mph breeze this weekend up to 17 mph southeast gusts.
That’s that sideways rain that makes umbrellas completely useless. If you see a tourist with a broken umbrella in a bin near Trinity College on Wednesday, you'll know why. Highs stay steady at 46°F, which is remarkably consistent, if a bit miserable.
Why the Rain and Snow Mix Matters
By the time we hit Friday, January 23, the temperature starts to slide. We’re looking at 42°F by day and a low of 36°F at night. From Friday through Monday, January 26, the forecast is just a repetitive loop of "rain and snow."
Honestly, this is the classic Dublin January trap. The humidity stays locked at 92%, making 39°F feel significantly colder than it actually is. The wind stays coming from the southeast, which usually means the moisture is coming straight off the Irish Sea.
- Saturday (Jan 17): 45°F High, 41°F Low. Mostly cloudy.
- Sunday (Jan 18): 47°F High, 40°F Low. Mostly cloudy.
- Monday (Jan 19): 45°F High, 38°F Low. Light rain/snow mix.
- Tuesday (Jan 20): 46°F High, 43°F Low. Solid rain.
- Wednesday (Jan 21): 46°F High, 42°F Low. More rain.
- Thursday (Jan 22): 45°F High, 41°F Low. Light rain lingers.
- Friday (Jan 23): 42°F High, 36°F Low. Partly sunny, then snow mix.
- Saturday (Jan 24): 41°F High, 36°F Low. Wintry mix.
- Sunday (Jan 25): 42°F High, 36°F Low. Wintry mix continues.
- Monday (Jan 26): 39°F High, 35°F Low. The coldest day of the stretch.
Survival Guide for the Next 10 Days
Don't buy a cheap umbrella. Seriously. Between Tuesday and Thursday, the 13-17 mph winds will turn it into a metal skeleton within minutes. You want a heavy-duty raincoat with a hood that actually stays up.
Also, watch out for the fog. Tonight and Monday night are looking prime for visibility issues. Met Éireann has already mentioned that light breezes and low temperatures are going to allow dense fog to develop in parts of the city. If you’re driving out toward the airport or the M50, give yourself an extra fifteen minutes.
Basically, the 10 weather forecast Dublin outlook is telling us to lean into "hygge" or whatever the Irish version is. Pubs with fires, thick wool socks, and accepting that you’re going to be slightly damp until at least next Tuesday.
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Pack waterproof boots for the end of next week. That rain-snow-slush combo on the 24th and 25th is a recipe for soaked feet. Keep an eye on the Tuesday wind speeds; if they spike above 17 mph, expect some minor travel delays on the DART or coastal bus routes.