January Weather in Portesham, United Kingdom

Last updated: August 27, 2025

In January, the average temperature in Portesham, United Kingdom hovers around 6°C (43°F), with a minimum drop to -4°C (25°F) and peaking at 14°C (57°F). Expect about 51 mm (2.0 in) of precipitation spread over 9 days, contributing to a high average humidity of 88%. Plan accordingly for a chilly and damp experience!

January Temperature in Portesham

In January in Portesham, the average temperature is 6°C (43°F). The maximum can reach 14°C (57°F) and the minimum can be as low as -4°C (25°F). Be sure to pack layered clothing to stay comfortable in the fluctuating temperatures while exploring.

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

The chart illustrates January temperature patterns in Portesham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portesham, January typically has an average temperature of 6°C (43°F), with highs reaching up to 14°C (57°F) and lows dropping to around -4°C (25°F).

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

January Precipitation in Portesham

In Portesham in January, the total precipitation amount is 51 mm (2.0 in) spread over 9 days.

January Precipitation Trends in Portesham

The chart displays monthly precipitation patterns in Portesham, 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 Portesham, January typically receives around 51 mm (2.0 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Portesham

In Portesham in January, humidity is 88%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and prompting you to seek warm shelter frequently.

January Average Humidity in Portesham

This chart illustrates the average monthly humidity levels in Portesham, 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 Portesham is approximately 88%, 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 Portesham

In Portesham in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Portesham, you can visit Hourly UV Index in Portesham.

Maximum UV Index Levels in Portesham for January

The chart shows the monthly maximum UV Index (UVI) for Portesham 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 Portesham typically reaches 2, which falls under the low exposure category.

Data source: Portesham 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 Portesham Compares to Other Months

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

This table compares monthly weather conditions in Portesham, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	51 mm (2.0 inches)	88%	low
February Weather	7°C (44°F)	64 mm (2.5 inches)	88%	low
March Weather	8°C (46°F)	73 mm (2.9 inches)	86%	moderate
April Weather	10°C (49°F)	48 mm (1.9 inches)	84%	high
May Weather	12°C (55°F)	73 mm (2.9 inches)	80%	high
June Weather	16°C (61°F)	76 mm (3.0 inches)	80%	very high
July Weather	18°C (64°F)	53 mm (2.1 inches)	70%	very high
August Weather	17°C (63°F)	78 mm (3.1 inches)	73%	high
September Weather	15°C (59°F)	48 mm (1.9 inches)	79%	high
October Weather	12°C (54°F)	106 mm (4.2 inches)	89%	moderate
November Weather	9°C (48°F)	66 mm (2.6 inches)	90%	low
December Weather	7°C (46°F)	98 mm (3.9 inches)	89%	low