January Weather in Castlerea, Ireland

Last updated: August 23, 2025

In January, the average temperature in Castlerea, Ireland hovers around 6°C (42°F). Minimum temperatures can dip to -4°C (25°F), while the maximum can reach 14°C (57°F). Expect precipitation totaling 74 mm (2.9 in) over about 12 days, accompanied by an average humidity of 88%. Prepare for a chilly and wet month!

January Temperature in Castlerea

In January in Castlerea, the average temperature is 6°C (42°F), with maximums reaching 14°C (57°F) and minimums dropping as low as -4°C (25°F). It's advisable to pack layers to stay comfortable while exploring the area.

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

The chart illustrates January temperature patterns in Castlerea, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castlerea, January typically has an average temperature of 6°C (42°F), with highs reaching up to 14°C (57°F) and lows dropping to around -4°C (25°F).

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

January Precipitation in Castlerea

In Castlerea in January, the precipitation amount is 74 mm (2.9 in) over a span of 12 days.

January Precipitation Trends in Castlerea

The chart displays monthly precipitation patterns in Castlerea, 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 Castlerea, January typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 12 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 Castlerea

In Castlerea in January, humidity is 88%. With an average temperature of 6°C (42°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable as the cold air clings to your skin and saps your energy.

January Average Humidity in Castlerea

This chart illustrates the average monthly humidity levels in Castlerea, 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 Castlerea is approximately 88%, 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 Castlerea

In Castlerea 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 Castlerea.

Maximum UV Index Levels in Castlerea for January

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

Data source: Castlerea 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 Castlerea Compares to Other Months

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

This table compares monthly weather conditions in Castlerea, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (42°F)	74 mm (2.9 inches)	88%	low
February Weather	6°C (43°F)	122 mm (4.8 inches)	88%	low
March Weather	7°C (44°F)	101 mm (4.0 inches)	87%	moderate
April Weather	9°C (48°F)	62 mm (2.4 inches)	86%	moderate
May Weather	11°C (53°F)	82 mm (3.2 inches)	83%	high
June Weather	14°C (57°F)	92 mm (3.6 inches)	83%	very high
July Weather	15°C (60°F)	84 mm (3.3 inches)	85%	very high
August Weather	15°C (59°F)	135 mm (5.3 inches)	85%	high
September Weather	13°C (56°F)	83 mm (3.3 inches)	88%	moderate
October Weather	10°C (51°F)	116 mm (4.6 inches)	91%	moderate
November Weather	7°C (46°F)	99 mm (3.9 inches)	92%	low
December Weather	6°C (44°F)	106 mm (4.2 inches)	89%	low