January Weather in Navan, Ireland

Last updated: August 23, 2025

In Navan, Ireland, the average temperature in January hovers around 5°C (42°F). Expect chilly conditions with minimums dipping to -5°C (23°F), while highs can reach up to 14°C (58°F). During this month, precipitation totals about 52 mm (2.0 in) over 10 days, accompanied by an average humidity level of 85%, making it a notably damp and cool period.

January Temperature in Navan

In January in Navan, the average temperature is 5°C (42°F). Maximums can reach 14°C (58°F), while minimums can dip as low as -5°C (23°F). Travelers should pack layers to stay warm and comfortable during this chilly season.

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

The chart illustrates January temperature patterns in Navan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Navan, January typically has an average temperature of 5°C (42°F), with highs reaching up to 14°C (58°F) and lows dropping to around -5°C (23°F).

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

January Precipitation in Navan

In Navan in January, the precipitation amount is 52 mm (2.0 in) over the course of 10 days.

January Precipitation Trends in Navan

The chart displays monthly precipitation patterns in Navan, 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 Navan, January typically receives around 52 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.

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Millimeters (mm) Inches (in)

January Humidity in Navan

In Navan 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 Navan

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

In Navan 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 Navan.

Maximum UV Index Levels in Navan for January

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

Data source: Navan 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 Navan Compares to Other Months

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

This table compares monthly weather conditions in Navan, 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)	52 mm (2.0 inches)	85%	low
February Weather	6°C (43°F)	85 mm (3.3 inches)	86%	low
March Weather	7°C (44°F)	79 mm (3.1 inches)	86%	moderate
April Weather	9°C (48°F)	47 mm (1.8 inches)	85%	moderate
May Weather	12°C (53°F)	68 mm (2.7 inches)	83%	high
June Weather	14°C (58°F)	77 mm (3.0 inches)	85%	very high
July Weather	16°C (61°F)	73 mm (2.9 inches)	86%	very high
August Weather	15°C (60°F)	107 mm (4.2 inches)	85%	high
September Weather	13°C (56°F)	73 mm (2.9 inches)	86%	moderate
October Weather	10°C (51°F)	77 mm (3.0 inches)	87%	moderate
November Weather	8°C (46°F)	82 mm (3.2 inches)	86%	low
December Weather	6°C (43°F)	87 mm (3.4 inches)	84%	low