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January Weather in Castleisland, Ireland

Last updated: August 23, 2025

In January, the average temperature in Castleisland, Ireland hovers around 6°C (43°F). Expect a chilly range with minimum temperatures plummeting to -5°C (24°F) and peaking at a mild 13°C (57°F). Be prepared for wet weather, as 74 mm (2.9 in) of precipitation is likely over 13 days, coupled with a high average humidity of 88%.

January Temperature in Castleisland

In January in Castleisland, the average temperature is 6°C (43°F), with maximums reaching 13°C (57°F) and minimums dropping as low as -5°C (24°F). This weather invites travelers to dress in layers and prepare for a mix of cool and chilly conditions while exploring the area.

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

The chart illustrates January temperature patterns in Castleisland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castleisland, January typically has an average temperature of 6°C (43°F), with highs reaching up to 13°C (57°F) and lows dropping to around -5°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec434444485256595956514645
Data source: Temperature data for Castleisland 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 Castleisland

In Castleisland in January, the precipitation amount is 74 mm (2.9 in) over the course of 13 days.

January Precipitation Trends in Castleisland

The chart displays monthly precipitation patterns in Castleisland, 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 Castleisland, January typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec74118104656964681148010996126
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Castleisland

In Castleisland in January, humidity is 88%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and prompting you to seek warm shelter frequently.

January Average Humidity in Castleisland

This chart illustrates the average monthly humidity levels in Castleisland, 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 Castleisland is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%86%83%83%85%85%88%91%92%89%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Castleisland

In Castleisland 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 Castleisland.

Maximum UV Index Levels in Castleisland for January

The chart shows the monthly maximum UV Index (UVI) for Castleisland 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 Castleisland typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124678875421
Data source: Castleisland 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 Castleisland Compares to Other Months

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

This table compares monthly weather conditions in Castleisland, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)74 mm (2.9 inches)88%low
February Weather7°C (44°F)118 mm (4.6 inches)88%low
March Weather7°C (44°F)104 mm (4.1 inches)87%moderate
April Weather9°C (48°F)65 mm (2.6 inches)86%high
May Weather11°C (52°F)69 mm (2.7 inches)83%high
June Weather13°C (57°F)64 mm (2.5 inches)83%very high
July Weather15°C (60°F)68 mm (2.7 inches)85%very high
August Weather15°C (59°F)114 mm (4.5 inches)85%high
September Weather13°C (56°F)80 mm (3.2 inches)88%moderate
October Weather10°C (51°F)109 mm (4.3 inches)91%moderate
November Weather8°C (47°F)96 mm (3.8 inches)92%low
December Weather7°C (45°F)126 mm (5.0 inches)89%low

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