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January Weather in Charlestown, Ireland

Last updated: August 23, 2025

In January, the average temperature in Charlestown, Ireland hovers around 6°C (42°F), with minimums dipping to -4°C (26°F) and maximums reaching 14°C (57°F). Expect a fair share of rain, as precipitation amounts to 79 mm (3.1 in) over the course of 13 days. With an average humidity of 88%, be prepared for a cool and damp atmosphere!

January Temperature in Charlestown

In January in Charlestown, the average temperature is 6°C (42°F). Maximum can reach 14°C (57°F) and minimum can be as low as -4°C (26°F). Be prepared for chilly weather and pack accordingly for your travels.

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

The chart illustrates January temperature patterns in Charlestown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Charlestown, 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 (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec424344475256595855504643
Data source: Temperature data for Charlestown 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 Charlestown

In Charlestown in January, the precipitation amount is 79 mm (3.1 in) over a span of 13 days.

January Precipitation Trends in Charlestown

The chart displays monthly precipitation patterns in Charlestown, 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 Charlestown, January typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec791241076582989614790120104109
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Charlestown

In Charlestown 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 Charlestown

This chart illustrates the average monthly humidity levels in Charlestown, 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 Charlestown 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 Charlestown

In Charlestown 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 Charlestown.

Maximum UV Index Levels in Charlestown for January

The chart shows the monthly maximum UV Index (UVI) for Charlestown 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 Charlestown typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Charlestown 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 Charlestown Compares to Other Months

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

This table compares monthly weather conditions in Charlestown, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)79 mm (3.1 inches)88%low
February Weather6°C (43°F)124 mm (4.9 inches)88%low
March Weather6°C (44°F)107 mm (4.2 inches)87%moderate
April Weather9°C (48°F)65 mm (2.6 inches)86%moderate
May Weather11°C (53°F)82 mm (3.2 inches)83%high
June Weather13°C (56°F)98 mm (3.8 inches)83%very high
July Weather15°C (59°F)96 mm (3.8 inches)85%very high
August Weather15°C (59°F)147 mm (5.8 inches)85%high
September Weather13°C (55°F)90 mm (3.5 inches)88%moderate
October Weather10°C (50°F)120 mm (4.7 inches)91%moderate
November Weather8°C (46°F)104 mm (4.1 inches)92%low
December Weather6°C (44°F)109 mm (4.3 inches)89%low

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