Monthly climate guide
Dublin weather in January
Expect cold weather in Dublin in January: afternoons reach about 8°C (46°F), while nights drop to around 4°C (39°F). Around 86 mm of rain falls over the month (some rain), and skies are often cloudy. Daytime highs are about the same as December and about the same as February.
What stands out in January
- It's one of the greyest months, with cloud cover near 80%.
- Keep a flexible plan: if showers roll in, shift Guinness Storehouse to a drier part of the day.
- In Dublin, January is mid-winter.
- Days and nights are close, only about 4°C apart.
January is typically Dublin's coolest month.
Avg high
8°C
46°F
Avg low
4°C
39°F
Rainfall
86 mm
some rain
Humidity
91%
relative
Sky
80%
cloud · often cloudy
Dublin weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 8°C / 46°F | 4°C / 39°F | 86 mm | 91% | 80% |
| February | 8°C / 46°F | 4°C / 39°F | 82 mm | 90% | 78% |
| March | 9°C / 48°F | 4°C / 39°F | 73 mm | 88% | 75% |
| April | 11°C / 52°F | 6°C / 42°F | 58 mm | 86% | 73% |
| May | 14°C / 56°F | 8°C / 46°F | 61 mm | 84% | 73% |
| June | 16°C / 61°F | 11°C / 51°F | 82 mm | 84% | 76% |
| July | 18°C / 64°F | 12°C / 54°F | 71 mm | 85% | 75% |
| August | 18°C / 64°F | 12°C / 54°F | 96 mm | 86% | 78% |
| September | 16°C / 61°F | 11°C / 51°F | 82 mm | 87% | 76% |
| October | 13°C / 56°F | 9°C / 48°F | 97 mm | 88% | 74% |
| November | 10°C / 50°F | 7°C / 44°F | 107 mm | 90% | 72% |
| December | 9°C / 47°F | 5°C / 41°F | 111 mm | 92% | 78% |
What to pack for January
- A proper insulated winter coat
- A hat, scarf and gloves
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is January a good time to visit Dublin?
Our Dublin guide recommends: May to September for the mildest, driest weather — though Dublin's weather is changeable year-round.
Book Book of Kells and Guinness Storehouse tickets online ahead of time — both are popular enough to have queues without a timed slot.
Best time to visit Dublin →Other Ireland cities in January
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Dublin weather in January. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/ireland/dublin/january
<a href="https://weathercompare.eu/weather/ireland/dublin/january">Dublin weather in January</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/ireland/dublin" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Dublin weather in January"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/ireland/dublin/january">Dublin weather in January</a> – WeatherCompare</p>
Dublin in January: quick answers
Is January a good time to visit Dublin?
January is cool in Dublin, with highs around 8°C. Better for museums and city walks than the beach, and usually quieter.
How warm is Dublin in January?
Average highs are about 8°C (46°F) and average lows about 4°C (39°F), based on 10 years of daily data.
Does it rain a lot in Dublin in January?
Dublin typically gets around 86 mm of rain in January — some rain.
When is the best time to visit Dublin?
May to September for the mildest, driest weather — though Dublin's weather is changeable year-round.
Figures are long-term averages for the area around Dublin (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.