January Weather in Dublin, United States

Last updated: June 24, 2025

In January, the average temperature in Dublin, United States hovers around 2°C (36°F). However, be prepared for a variety of conditions, as temperatures can dip to a chilly -19°C (-3°F) or rise to a pleasant 20°C (69°F). During this month, expect approximately 66 mm (2.6 in) of precipitation spread over 10 days, contributing to an average humidity level of 87%.

January Temperature in Dublin

In January in Dublin, the average temperature is 2°C (36°F). Maximums can reach 20°C (69°F), while minimums can dip as low as -19°C (-3°F). Be prepared for a wide range of temperatures and pack accordingly for your travels!

January Weather in Dublin: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Dublin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dublin, January typically has an average temperature of 2°C (36°F), with highs reaching up to 20°C (69°F) and lows dropping to around -19°C (-3°F).

Data source: Temperature data for Dublin generated using information from the Copernicus Climate Change Service.

January Precipitation in Dublin

In Dublin in January, the precipitation amount is 66 mm (2.6 in) over the course of 10 days.

January Precipitation Trends in Dublin

The chart displays monthly precipitation patterns in Dublin, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Dublin, January typically receives around 66 mm (2.6 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Dublin

In Dublin in January, humidity is 87%. With an average temperature of 2°C (36°F), this humidity feels like an unwelcome chill that seeps into your bones, making outdoor exploration feel damp and heavy, and encouraging travelers to seek the warmth of indoor attractions instead.

January Average Humidity in Dublin

This chart illustrates the average monthly humidity levels in Dublin, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Dublin is approximately 87%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Dublin

In Dublin in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Dublin for better planning.

Maximum UV Index Levels in Dublin for January

The chart shows the monthly maximum UV Index (UVI) for Dublin in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Dublin typically reaches 4, which falls under the moderate exposure category.

Data source: Dublin January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Dublin Compares to Other Months

Weather in Dublin varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Dublin, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Dublin, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (36°F)	66 mm (2.6 inches)	87%	moderate
February Weather	5°C (41°F)	105 mm (4.1 inches)	87%	high
March Weather	7°C (46°F)	84 mm (3.3 inches)	86%	very high
April Weather	12°C (54°F)	105 mm (4.1 inches)	84%	very high
May Weather	17°C (63°F)	102 mm (4.0 inches)	83%	extreme
June Weather	21°C (69°F)	85 mm (3.3 inches)	83%	extreme
July Weather	23°C (74°F)	61 mm (2.4 inches)	79%	extreme
August Weather	22°C (72°F)	86 mm (3.4 inches)	66%	very high
September Weather	20°C (67°F)	95 mm (3.7 inches)	68%	very high
October Weather	14°C (58°F)	97 mm (3.8 inches)	78%	high
November Weather	6°C (44°F)	61 mm (2.4 inches)	89%	moderate
December Weather	4°C (40°F)	87 mm (3.4 inches)	86%	moderate