January Weather in Trefriw, United Kingdom

Last updated: August 27, 2025

In January, the average temperature in Trefriw, United Kingdom hovers around 5°C (42°F), with a minimum dipping to -3°C (26°F) and a maximum peaking at 14°C (58°F). Expect 71 mm (2.8 in) of precipitation spread over 13 days, contributing to an average humidity level of 89%. Be prepared for a cool and damp atmosphere!

January Temperature in Trefriw

In January in Trefriw, the average temperature is 5°C (42°F), with maximums reaching 14°C (58°F) and minimums dropping as low as -3°C (26°F). It's advisable to pack warm clothing to stay comfortable during your trip.

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

The chart illustrates January temperature patterns in Trefriw, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Trefriw, 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 -3°C (26°F).

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

January Precipitation in Trefriw

In Trefriw in January, the total precipitation amount is 71 mm (2.8 in) occurring over the course of 13 days.

January Precipitation Trends in Trefriw

The chart displays monthly precipitation patterns in Trefriw, 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 Trefriw, January typically receives around 71 mm (2.8 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 Trefriw

In Trefriw in January humidity is 89%. With an average temperature of 5°C (42°F), this humidity feels like a chill that clings to your skin, making outdoor activities less enjoyable and requiring extra layers to stay warm and comfortable while exploring.

January Average Humidity in Trefriw

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

In Trefriw 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 Trefriw.

Maximum UV Index Levels in Trefriw for January

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

Data source: Trefriw 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 Trefriw Compares to Other Months

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

This table compares monthly weather conditions in Trefriw, 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)	71 mm (2.8 inches)	89%	low
February Weather	6°C (43°F)	92 mm (3.6 inches)	88%	low
March Weather	7°C (44°F)	96 mm (3.8 inches)	86%	moderate
April Weather	9°C (48°F)	56 mm (2.2 inches)	84%	moderate
May Weather	12°C (53°F)	71 mm (2.8 inches)	79%	high
June Weather	15°C (59°F)	99 mm (3.9 inches)	81%	very high
July Weather	16°C (61°F)	92 mm (3.6 inches)	78%	very high
August Weather	16°C (60°F)	96 mm (3.8 inches)	79%	high
September Weather	14°C (57°F)	96 mm (3.8 inches)	85%	moderate
October Weather	11°C (52°F)	107 mm (4.2 inches)	90%	moderate
November Weather	8°C (47°F)	91 mm (3.6 inches)	91%	low
December Weather	6°C (44°F)	115 mm (4.5 inches)	89%	low