January Weather in Dublin, United States

Last updated: June 24, 2025

In January, the average temperature in Dublin, United States hovers around -1°C (30°F), but be prepared for extremes—the minimum can plunge to -27°C (-16°F) and the maximum can reach 18°C (65°F). With an average humidity of 87% and a total precipitation of 79 mm (3.1 in) spread over 9 days, it's essential to come prepared for both chilly weather and occasional dampness. Stay cozy!

January Temperature in Dublin

In January in Dublin, the average temperature is -1°C (30°F), with maximums reaching 18°C (65°F) and minimums plunging as low as -27°C (-16°F). Be sure to pack accordingly to enjoy your trip despite the wide temperature range!

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 -1°C (30°F), with highs reaching up to 18°C (65°F) and lows dropping to around -27°C (-16°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 79 mm (3.1 in) spread over 9 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 79 mm (3.1 inches) of precipitation spread over approximately 9 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 -1°C (30°F), this humidity feels like a biting chill that penetrates through layers of clothing, making travel uncomfortable as the dampness clings to your skin, intensifying the cold and causing every gust of wind to feel even more frigid.

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 is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Dublin, you can check the information here.

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 3, 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	-1°C (30°F)	79 mm (3.1 inches)	87%	moderate
February Weather	1°C (34°F)	100 mm (3.9 inches)	85%	moderate
March Weather	6°C (43°F)	132 mm (5.2 inches)	86%	high
April Weather	11°C (52°F)	104 mm (4.1 inches)	84%	very high
May Weather	18°C (64°F)	136 mm (5.4 inches)	79%	very high
June Weather	22°C (73°F)	118 mm (4.6 inches)	82%	extreme
July Weather	24°C (76°F)	115 mm (4.5 inches)	79%	very high
August Weather	23°C (73°F)	88 mm (3.5 inches)	70%	very high
September Weather	21°C (69°F)	90 mm (3.5 inches)	69%	very high
October Weather	14°C (58°F)	100 mm (3.9 inches)	76%	high
November Weather	5°C (42°F)	97 mm (3.8 inches)	88%	moderate
December Weather	2°C (36°F)	90 mm (3.5 inches)	87%	moderate