The weather in Dublin in January is wintery.
And, while the weather in Dublin is generally fairly unpredictable, January in Dublin is usually cold and wet.
The LTA (Long Term Average) temperature in Dublin in January is 5.3°C/41.54°F with average rainfall of 62.6mm.
Below, you’ll discover everything you know, from rainfall in January in Dublin to lots more.
Some info about the weather in Dublin in January
OK, let’s get you up-to-speed nice and quickly. The points below will give you a quick insight into the weather in Dublin in January:
1. The season
December, January and February are the winter months in Ireland. This is the ‘off season’ in terms of tourist numbers.
2. The weather in general
The weather in Dublin in January tends to be cold, wet and windy (detailed info below). It definitely isn’t the best month to visit Dublin weather-wise, but it’ll suit those of you doing Ireland on a budget as flights and accommodation prices will be lower.
3. Average temperatures
The LTA (Long Term Average) temperature in Dublin in January is 5.3°C/41.54°F with average rainfall of 62.6mm.
4. Short days
One of the biggest disadvantages of January is the short days. At the beginning of the month the sun rises from 08:29 and sets from 16:38. This means you’ll need to be careful when planning your Ireland itinerary.
5. Still lots to do
Although the weather in Dublin in January isn’t great, there’s still plenty of things to do in Dublin during this month (see our main Dublin in January guide). You just need to have ‘Plan Bs’ in your back pocket in the event that there’s rain.
The average temperature in Dublin in January
The LTA (Long Term Average) temperature in Dublin in January is 5.3°C/41.54°F with average rainfall of 62.6mm.
In the graphic above, you’ll see a comparison of the average temps in Dublin across the year (incase you’re debating visiting during a different month).
Please note that all of the Dublin in January weather data is via Met Eireann (the Irish Meteorological Service).
A comparison of January weather in Dublin in recent years
| County | 2025 | 2024 | 2023 |
|---|---|---|---|
| Dublin | 4.3°C/39.74°F | 5.0°C/41.00°F | 6.0°C/42.80°F |
| Galway | 6.5°C/43.70°F | 6.4°C/43.52°F | 7.2°C/44.96°F |
| Cork | 5.4°C/41.72°F | 4.8°C/40.64°F | 6.1°C/42.98°F |
| Kerry | 7.1°C/44.78°F | 6.3°C/43.34°F | 7.7°C/45.86°F |
As you can see, the average temperature in Ireland in January is fairly steady across the different years and in the various counties.
Rainfall in Dublin in January (measured in mm)
| County | 2022 | 2021 | 2020 |
|---|---|---|---|
| Dublin | 14.4 | 115.1 | 36.0 |
| Galway | 56.9 | 167.3 | 118.7 |
| Cork | 32.5 | 117.8 | 88.7 |
| Kerry | 74.6 | 152.8 | 146.3 |
We get asked ‘Does in rain in Dublin in January?’ a lot. The answer is yes, yes it does (see our guide on what to wear in Dublin in January).
The LTA (Long Term Average) rainfall for Dublin in January measures at 62.6mm.
Rainfall in Dublin in January tends to be considerably higher than in many other months of the year.
FAQs about the weather in Dublin in January
We’ve had a lot of questions over the years asking about everything from ‘Does it snow in Dublin in January?’ to ‘Is Dublin January weather always wet?’.
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 Dublin’s weather like in January?
Does it snow in Dublin in January?
What is the coldest month in Dublin?
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.