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March Weather in St Helens, United Kingdom

Last updated: August 27, 2025

In March, the average temperature in St Helens, United Kingdom hovers around 7°C (45°F). Expect a chilly minimum of -5°C (23°F), while highs can reach up to 19°C (67°F). With an average precipitation of 97 mm (3.8 in) spread over 16 days, don’t forget your umbrella! The humidity is quite high at 86%, creating a distinctly damp atmosphere.

March Temperature in St Helens

In March in St Helens, the average temperature is 7°C (45°F). The maximum can reach 19°C (67°F) and the minimum can be as low as -5°C (23°F). It's advisable to pack layers to stay comfortable while exploring the diverse weather conditions.

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 7°C (45°F), with highs reaching up to 19°C (67°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec424345485460626158534743
Data source: Temperature data for St Helens 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.

March Precipitation in St Helens

In St Helens in March, the total precipitation amount is 97 mm (3.8 in) over the course of 16 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 97 mm (3.8 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec758897506297981199911897115
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in St Helens

In St Helens in March, humidity is 86%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration a bit uncomfortable and necessitating cozy layers to stay warm while navigating the moist air.

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.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%85%79%81%78%79%85%90%91%89%
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 is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in St Helens, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123578875421
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.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)75 mm (3.0 inches)89%low
February Weather6°C (43°F)88 mm (3.5 inches)88%low
March Weather7°C (45°F)97 mm (3.8 inches)86%moderate
April Weather9°C (49°F)50 mm (2.0 inches)84%moderate
May Weather12°C (54°F)62 mm (2.4 inches)79%high
June Weather15°C (60°F)97 mm (3.8 inches)81%very high
July Weather17°C (63°F)98 mm (3.9 inches)78%very high
August Weather16°C (62°F)119 mm (4.7 inches)79%high
September Weather14°C (58°F)99 mm (3.9 inches)85%moderate
October Weather11°C (53°F)117 mm (4.6 inches)90%moderate
November Weather8°C (47°F)97 mm (3.8 inches)91%low
December Weather6°C (44°F)115 mm (4.5 inches)89%low

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