January Weather in Carlow, Ireland

Last updated: August 23, 2025

In January, the average temperature in Carlow, Ireland hovers around 5°C (42°F). Expect temperature swings with a minimum of -5°C (22°F) and a maximum of 13°C (56°F). Be prepared for relatively wet conditions, as precipitation averages 50 mm (2.0 in) over 10 days. With 85% average humidity, the air will feel distinctly damp.

January Temperature in Carlow

In January in Carlow, the average temperature is 5°C (42°F). Maximum temperatures can reach 13°C (56°F), while minimums can dip as low as -5°C (22°F). It's advisable to dress in layers to stay comfortable while exploring.

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

The chart illustrates January temperature patterns in Carlow, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Carlow, January typically has an average temperature of 5°C (42°F), with highs reaching up to 13°C (56°F) and lows dropping to around -5°C (22°F).

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

January Precipitation in Carlow

In Carlow in January, the precipitation amount is 50 mm (2.0 in) over a span of 10 days.

January Precipitation Trends in Carlow

The chart displays monthly precipitation patterns in Carlow, 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 Carlow, January typically receives around 50 mm (2.0 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 Carlow

In Carlow in January, humidity is 85%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and requiring extra layers to stay warm while exploring.

January Average Humidity in Carlow

This chart illustrates the average monthly humidity levels in Carlow, 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 Carlow is approximately 85%, 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 Carlow

In Carlow in January, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Carlow.

Maximum UV Index Levels in Carlow for January

The chart shows the monthly maximum UV Index (UVI) for Carlow 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 Carlow typically reaches 1, which falls under the low exposure category.

Data source: Carlow 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 Carlow Compares to Other Months

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

This table compares monthly weather conditions in Carlow, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	50 mm (2.0 inches)	85%	low
February Weather	6°C (43°F)	89 mm (3.5 inches)	86%	low
March Weather	6°C (44°F)	79 mm (3.1 inches)	86%	moderate
April Weather	8°C (47°F)	59 mm (2.3 inches)	85%	moderate
May Weather	11°C (53°F)	68 mm (2.7 inches)	83%	high
June Weather	14°C (58°F)	67 mm (2.7 inches)	85%	very high
July Weather	16°C (61°F)	67 mm (2.6 inches)	86%	very high
August Weather	15°C (60°F)	96 mm (3.8 inches)	85%	high
September Weather	13°C (56°F)	64 mm (2.5 inches)	86%	moderate
October Weather	10°C (51°F)	86 mm (3.4 inches)	87%	moderate
November Weather	7°C (46°F)	90 mm (3.5 inches)	86%	low
December Weather	6°C (43°F)	99 mm (3.9 inches)	84%	low