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September Weather in March, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in March, United Kingdom hovers around 15°C (60°F). Expect a comfortable range, with minimums dipping to 3°C (37°F) and maximums reaching up to 30°C (86°F). Prepare for a bit of rain, as you'll see an average precipitation of 56 mm (2.2 in) over approximately 10 days, and don’t forget about the high average humidity at 84%!

September Temperature in March

In September in March, the average temperature is 15°C (60°F). Maximums can reach 30°C (86°F) and minimums can be as low as 3°C (37°F). This range of temperatures makes March an ideal destination for travelers looking to enjoy a mix of mild and warm weather.

September Weather in March: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in March, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In March, September typically has an average temperature of 15°C (60°F), with highs reaching up to 30°C (86°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec414345495562656459534643
Data source: Temperature data for March 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.

September Precipitation in March

In March in September, the precipitation amount is 56 mm (2.2 in) over the course of 10 days.

September Precipitation Trends in March

The chart displays monthly precipitation patterns in March, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In March, September typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec484853336572687256754878
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in March

In March in September humidity is 84%. With an average temperature of 15°C (60°F), this humidity feels like a warm blanket wrapped around you, making outdoor exploration feel stifling and sticky, while creating a heavy air that may slow your pace and dampen your enthusiasm for sightseeing.

September Average Humidity in March

This chart illustrates the average monthly humidity levels in March, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in March is approximately 84%, 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 September generated using information from the Copernicus Climate Change Service.

September UV Index in March

In March in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in March.

Maximum UV Index Levels in March for September

The chart shows the monthly maximum UV Index (UVI) for March in September, 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 September, the maximum UV index in March typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: March September 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 September Weather in March Compares to Other Months

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

This table compares monthly weather conditions in March, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)48 mm (1.9 inches)89%low
February Weather6°C (43°F)48 mm (1.9 inches)87%low
March Weather7°C (46°F)53 mm (2.1 inches)86%moderate
April Weather9°C (49°F)33 mm (1.3 inches)85%moderate
May Weather13°C (55°F)65 mm (2.6 inches)83%high
June Weather16°C (62°F)72 mm (2.8 inches)83%very high
July Weather18°C (65°F)68 mm (2.7 inches)79%very high
August Weather18°C (65°F)72 mm (2.8 inches)78%high
September Weather15°C (60°F)56 mm (2.2 inches)84%moderate
October Weather12°C (54°F)75 mm (3.0 inches)88%moderate
November Weather8°C (46°F)48 mm (1.9 inches)89%low
December Weather6°C (43°F)78 mm (3.1 inches)88%low

Compare March's Climate with Cities Worldwide