January Weather in Grendon, United Kingdom

Last updated: August 27, 2025

In Grendon, United Kingdom, the average temperature in January hovers around 5°C (40°F). Temperatures can dip as low as -5°C (24°F) or rise to a maximum of 14°C (58°F). During this time, expect approximately 52 mm (2.0 in) of precipitation spread over 10 days, accompanied by a high average humidity of 90%.

January Temperature in Grendon

In January in Grendon, the average temperature is 5°C (40°F), with a maximum reaching 14°C (58°F) and a minimum dipping as low as -5°C (24°F). Be sure to pack warm clothing and layers to stay comfortable during your travels in this chilly climate!

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

The chart illustrates January temperature patterns in Grendon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grendon, January typically has an average temperature of 5°C (40°F), with highs reaching up to 14°C (58°F) and lows dropping to around -5°C (24°F).

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

January Precipitation in Grendon

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

January Precipitation Trends in Grendon

The chart displays monthly precipitation patterns in Grendon, 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 Grendon, 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 Grendon

In Grendon in January, humidity is 90%. With an average temperature of 5°C (40°F), this humidity feels like you're walking through a dense fog, making every step feel heavier and more challenging for traveling.

January Average Humidity in Grendon

This chart illustrates the average monthly humidity levels in Grendon, 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 Grendon is approximately 90%, 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 Grendon

In Grendon 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 Grendon.

Maximum UV Index Levels in Grendon for January

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

Data source: Grendon 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 Grendon Compares to Other Months

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

This table compares monthly weather conditions in Grendon, 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 (40°F)	52 mm (2.0 inches)	90%	low
February Weather	6°C (42°F)	49 mm (1.9 inches)	88%	low
March Weather	7°C (45°F)	59 mm (2.3 inches)	86%	moderate
April Weather	9°C (48°F)	39 mm (1.5 inches)	84%	moderate
May Weather	12°C (54°F)	65 mm (2.6 inches)	80%	high
June Weather	16°C (61°F)	73 mm (2.9 inches)	81%	very high
July Weather	18°C (65°F)	69 mm (2.7 inches)	76%	very high
August Weather	17°C (63°F)	72 mm (2.8 inches)	77%	high
September Weather	15°C (59°F)	56 mm (2.2 inches)	85%	moderate
October Weather	11°C (52°F)	86 mm (3.4 inches)	90%	moderate
November Weather	7°C (46°F)	57 mm (2.2 inches)	92%	low
December Weather	6°C (43°F)	79 mm (3.1 inches)	90%	low