January Weather in Sligo, United States

Last updated: June 24, 2025

In Sligo, United States, the average temperature in January hovers around -2°C (29°F). While it can drop to a chilly -26°C (-14°F), temperatures can also reach a mild 20°C (68°F). Expect about 101 mm (4.0 in) of precipitation over 13 days, accompanied by a high average humidity of 89%. Stay prepared for a mix of winter's chill and occasional warmth!

January Temperature in Sligo

In January, Sligo experiences an average temperature of -2°C (29°F), with maximums reaching 20°C (68°F) and minimums dropping as low as -26°C (-14°F). This wide range in temperatures makes it essential for travelers to be prepared for both chilly days and unexpectedly warm spells.

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

The chart illustrates January temperature patterns in Sligo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sligo, January typically has an average temperature of -2°C (29°F), with highs reaching up to 20°C (68°F) and lows dropping to around -26°C (-14°F).

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

January Precipitation in Sligo

In Sligo in January, the precipitation amount is 101 mm (4.0 in) over the course of 13 days.

January Precipitation Trends in Sligo

The chart displays monthly precipitation patterns in Sligo, 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 Sligo, January typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 13 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Sligo

In Sligo in January humidity is 89%. With an average temperature of -2°C (29°F), this humidity feels like a suffocating fog that clings to your skin, making outdoor adventures less enjoyable and giving travel a heavy and oppressive feel.

January Average Humidity in Sligo

This chart illustrates the average monthly humidity levels in Sligo, 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 Sligo is approximately 89%, 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 Sligo

In Sligo 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 Sligo, you can check the information here.

Maximum UV Index Levels in Sligo for January

The chart shows the monthly maximum UV Index (UVI) for Sligo 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 Sligo typically reaches 3, which falls under the moderate exposure category.

Data source: Sligo 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 Sligo Compares to Other Months

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

This table compares monthly weather conditions in Sligo, 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 (29°F)	101 mm (4.0 inches)	89%	moderate
February Weather	0°C (33°F)	119 mm (4.7 inches)	90%	moderate
March Weather	4°C (39°F)	106 mm (4.2 inches)	89%	high
April Weather	9°C (49°F)	136 mm (5.3 inches)	88%	very high
May Weather	16°C (60°F)	158 mm (6.2 inches)	80%	very high
June Weather	20°C (68°F)	139 mm (5.5 inches)	79%	very high
July Weather	23°C (73°F)	151 mm (6.0 inches)	74%	very high
August Weather	22°C (71°F)	110 mm (4.3 inches)	64%	very high
September Weather	18°C (65°F)	126 mm (5.0 inches)	67%	very high
October Weather	13°C (55°F)	130 mm (5.1 inches)	81%	high
November Weather	4°C (40°F)	101 mm (4.0 inches)	89%	moderate
December Weather	1°C (34°F)	103 mm (4.1 inches)	88%	low