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January Weather in Waltham, United Kingdom

Last updated: August 27, 2025

In January, the average temperature in Waltham, United Kingdom is a brisk 5°C (41°F). Expect chilly conditions, with minimums dipping to -3°C (27°F) and maximums reaching up to 15°C (59°F). While you might enjoy some sunshine, be prepared for 43 mm (1.7 in) of precipitation over about 8 days, accompanied by a high average humidity of 89%.

January Temperature in Waltham

In January in Waltham, the average temperature is 5°C (41°F), with maximums reaching 15°C (59°F) and minimums dropping as low as -3°C (27°F). Travelers should be prepared for chilly weather and pack accordingly for varying temperatures.

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

The chart illustrates January temperature patterns in Waltham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Waltham, January typically has an average temperature of 5°C (41°F), with highs reaching up to 15°C (59°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec414245475359636358534642
Data source: Temperature data for Waltham 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 Waltham

In Waltham in January, the total precipitation amount is 43 mm (1.7 in) over the course of 8 days.

January Precipitation Trends in Waltham

The chart displays monthly precipitation patterns in Waltham, 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 Waltham, January typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec435658336678788165756268
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Waltham

In Waltham in January humidity is 89%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration less enjoyable and encouraging travelers to seek warmth indoors or layer up to stay comfortable while venturing out.

January Average Humidity in Waltham

This chart illustrates the average monthly humidity levels in Waltham, 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 Waltham is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%87%86%85%83%83%80%78%84%88%89%88%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Waltham

In Waltham 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 Waltham.

Maximum UV Index Levels in Waltham for January

The chart shows the monthly maximum UV Index (UVI) for Waltham 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 Waltham typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123578875321
Data source: Waltham 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 Waltham Compares to Other Months

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

This table compares monthly weather conditions in Waltham, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)43 mm (1.7 inches)89%low
February Weather6°C (43°F)56 mm (2.2 inches)87%low
March Weather7°C (45°F)58 mm (2.3 inches)86%moderate
April Weather9°C (48°F)33 mm (1.3 inches)85%moderate
May Weather12°C (54°F)66 mm (2.6 inches)83%high
June Weather15°C (60°F)78 mm (3.1 inches)83%very high
July Weather17°C (63°F)78 mm (3.1 inches)79%very high
August Weather17°C (63°F)81 mm (3.2 inches)78%high
September Weather15°C (58°F)65 mm (2.5 inches)84%moderate
October Weather11°C (53°F)75 mm (2.9 inches)88%moderate
November Weather8°C (47°F)62 mm (2.4 inches)89%low
December Weather6°C (42°F)68 mm (2.7 inches)88%low

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