March Weather in St. Helens, United Kingdom

Last updated: August 27, 2025

In March, the average temperature in St. Helens, United Kingdom hovers around 8°C (47°F). However, be prepared for temperature fluctuations, as the minimum can dip to -3°C (28°F) while the maximum can reach up to 14°C (58°F). Expect a precipitation amount of 70 mm (2.7 in) spread over approximately 13 days, coupled with an average humidity level of 86%.

March Temperature in St. Helens

In March in St. Helens, the average temperature is 8°C (47°F), with maximums reaching 14°C (58°F) and minimums dropping as low as -3°C (28°F). Be sure to pack layers to stay comfortable while exploring.

March Weather in St. Helens: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in St. Helens, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St. Helens, March typically has an average temperature of 8°C (47°F), with highs reaching up to 14°C (58°F) and lows dropping to around -3°C (28°F).

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

March Precipitation in St. Helens

In St. Helens in March, the precipitation amount is 70 mm (2.7 in) over the course of 13 days.

March Precipitation Trends in St. Helens

The chart displays monthly precipitation patterns in St. Helens, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In St. Helens, March typically receives around 70 mm (2.7 inches) of precipitation spread over approximately 13 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

March Humidity in St. Helens

In St. Helens in March, humidity is 86%. With an average temperature of 8°C (47°F), this humidity feels like a chilling damp that penetrates your clothes, making outdoor adventures less enjoyable and encouraging you to seek warmth indoors rather than explore the sights.

March Average Humidity in St. Helens

This chart illustrates the average monthly humidity levels in St. Helens, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in St. Helens is approximately 86%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in St. Helens

In St. Helens in March, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in St. Helens for better planning.

Maximum UV Index Levels in St. Helens for March

The chart shows the monthly maximum UV Index (UVI) for St. Helens in March, 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 March, the maximum UV index in St. Helens typically reaches 4, which falls under the moderate exposure category.

Data source: St. Helens March 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 March Weather in St. Helens Compares to Other Months

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

This table compares monthly weather conditions in St. Helens, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	68 mm (2.7 inches)	91%	low
February Weather	7°C (45°F)	75 mm (3.0 inches)	89%	low
March Weather	8°C (47°F)	70 mm (2.7 inches)	86%	moderate
April Weather	10°C (50°F)	32 mm (1.3 inches)	85%	moderate
May Weather	13°C (55°F)	56 mm (2.2 inches)	79%	high
June Weather	16°C (61°F)	73 mm (2.9 inches)	80%	very high
July Weather	18°C (65°F)	58 mm (2.3 inches)	71%	very high
August Weather	18°C (64°F)	78 mm (3.1 inches)	76%	high
September Weather	16°C (61°F)	57 mm (2.2 inches)	82%	high
October Weather	13°C (56°F)	117 mm (4.6 inches)	90%	moderate
November Weather	10°C (50°F)	87 mm (3.4 inches)	92%	low
December Weather	8°C (47°F)	118 mm (4.7 inches)	92%	low