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January Weather in Dublin, United States

Last updated: June 24, 2025

In Dublin, United States, the average temperature in January hovers around -4°C (24°F), with a minimum dropping as low as -27°C (-17°F) and a maximum reaching up to 16°C (61°F). You'll experience an average of 74 mm (2.9 in) of precipitation spread over 8 days, accompanied by a high average humidity of 86%.

January Temperature in Dublin

In January in Dublin, the average temperature is -4°C (24°F), with maximums reaching up to 16°C (61°F) and minimums dipping as low as -27°C (-17°F). Travelers should be prepared for a wide range of temperatures during their visit, so layering clothing is essential.

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 -4°C (24°F), with highs reaching up to 16°C (61°F) and lows dropping to around -27°C (-17°F).
JanFebMarAprMayJunJulAugSepOctNovDec242733455667727063513728
Data source: Temperature data for Dublin generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Dublin

In Dublin in January, the precipitation amount is 74 mm (2.9 in) over a period of 8 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 74 mm (2.9 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec748881130868914010187135104120
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Dublin

In Dublin in January, humidity is 86%. With an average temperature of -4°C (24°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and travel challenging, as you navigate the damp air while struggling to keep warm.

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 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%82%80%72%72%67%66%71%79%84%81%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3468910997632
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.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (24°F)74 mm (2.9 inches)86%moderate
February Weather-3°C (27°F)88 mm (3.5 inches)84%moderate
March Weather0°C (33°F)81 mm (3.2 inches)82%high
April Weather7°C (45°F)130 mm (5.1 inches)80%very high
May Weather14°C (57°F)86 mm (3.4 inches)72%very high
June Weather19°C (67°F)89 mm (3.5 inches)72%very high
July Weather22°C (72°F)140 mm (5.5 inches)67%very high
August Weather21°C (70°F)101 mm (4.0 inches)66%very high
September Weather17°C (63°F)87 mm (3.4 inches)71%high
October Weather11°C (52°F)135 mm (5.3 inches)78%high
November Weather3°C (37°F)104 mm (4.1 inches)84%moderate
December Weather-2°C (28°F)120 mm (4.7 inches)81%low

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