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January Weather in Thornhill, United Kingdom

Last updated: August 27, 2025

In Thornhill, United Kingdom, the average temperature in January hovers around 3°C (38°F), with potential lows plummeting to -14°C (6°F) and highs reaching up to 12°C (54°F). Prepare for a wet month, as 86 mm (3.4 in) of precipitation is expected over approximately 12 days. With an average humidity of a staggering 90%, make sure you're ready for a notably brisk and damp experience!

January Temperature in Thornhill

In January in Thornhill, the average temperature is 3°C (38°F). Maximum temperatures can reach 12°C (54°F), while minimum temperatures can drop as low as -14°C (6°F). Be prepared for a wide range of temperatures if you plan to travel during this time.

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

The chart illustrates January temperature patterns in Thornhill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Thornhill, January typically has an average temperature of 3°C (38°F), with highs reaching up to 12°C (54°F) and lows dropping to around -14°C (6°F).
JanFebMarAprMayJunJulAugSepOctNovDec383941445056585753484339
Data source: Temperature data for Thornhill 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 Thornhill

In Thornhill in January, the precipitation amount is 86 mm (3.4 in) over a span of 12 days.

January Precipitation Trends in Thornhill

The chart displays monthly precipitation patterns in Thornhill, 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 Thornhill, January typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec861611164875112103144101142121122
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Thornhill

In Thornhill in January humidity is 90%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill wrapping around you, making travel uncomfortable as the cold penetrates your clothing while the heavy moisture lingers in the air.

January Average Humidity in Thornhill

This chart illustrates the average monthly humidity levels in Thornhill, 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 Thornhill is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%85%81%83%82%82%88%90%92%89%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Thornhill

In Thornhill 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 Thornhill.

Maximum UV Index Levels in Thornhill for January

The chart shows the monthly maximum UV Index (UVI) for Thornhill 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 Thornhill typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123568865321
Data source: Thornhill 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 Thornhill Compares to Other Months

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

This table compares monthly weather conditions in Thornhill, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)86 mm (3.4 inches)90%low
February Weather4°C (39°F)161 mm (6.3 inches)88%low
March Weather5°C (41°F)116 mm (4.6 inches)86%moderate
April Weather7°C (45°F)47 mm (1.9 inches)85%moderate
May Weather10°C (50°F)75 mm (2.9 inches)80%high
June Weather13°C (56°F)112 mm (4.4 inches)83%very high
July Weather15°C (59°F)103 mm (4.0 inches)82%very high
August Weather14°C (57°F)144 mm (5.7 inches)82%high
September Weather12°C (54°F)101 mm (4.0 inches)88%moderate
October Weather9°C (48°F)142 mm (5.6 inches)90%moderate
November Weather6°C (43°F)121 mm (4.8 inches)92%low
December Weather4°C (40°F)122 mm (4.8 inches)89%low

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