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September Weather in Mainstone, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in Mainstone, United Kingdom is a mild 13°C (56°F), with temperatures ranging from a cool 1°C (34°F) to a warm 27°C (81°F). Expect 60 mm (2.4 in) of precipitation over approximately 11 days, leading to a notably high average humidity of 85%.

September Temperature in Mainstone

In September in Mainstone, the average temperature is 13°C (56°F), with maximums reaching up to 27°C (81°F) and minimums dropping as low as 1°C (34°F). This makes it a great time for travelers to experience a diverse range of weather, perfect for outdoor activities and exploring the local sights.

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

The chart illustrates September temperature patterns in Mainstone, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mainstone, September typically has an average temperature of 13°C (56°F), with highs reaching up to 27°C (81°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec404143465258616056514542
Data source: Temperature data for Mainstone 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 Mainstone

In Mainstone in September, the precipitation amount is 60 mm (2.4 in) over the course of 11 days.

September Precipitation Trends in Mainstone

The chart displays monthly precipitation patterns in Mainstone, 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 Mainstone, September typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec587882527186617260907793
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mainstone

In Mainstone in September humidity is 85%. With an average temperature of 13°C (56°F), this humidity feels like a damp chill that wraps around you, making outdoor activities feel heavier and less enjoyable, as layers of clothing cling to the skin and breath becomes visible in the moist air.

September Average Humidity in Mainstone

This chart illustrates the average monthly humidity levels in Mainstone, 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 Mainstone is approximately 85%, 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 September generated using information from the Copernicus Climate Change Service.

September UV Index in Mainstone

In Mainstone in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Mainstone, you can refer to this Hourly UV Index in Mainstone.

Maximum UV Index Levels in Mainstone for September

The chart shows the monthly maximum UV Index (UVI) for Mainstone 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 Mainstone typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124678876421
Data source: Mainstone 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 Mainstone Compares to Other Months

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

This table compares monthly weather conditions in Mainstone, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)58 mm (2.3 inches)89%low
February Weather5°C (41°F)78 mm (3.1 inches)88%low
March Weather6°C (43°F)82 mm (3.2 inches)86%moderate
April Weather8°C (47°F)52 mm (2.1 inches)84%high
May Weather11°C (52°F)71 mm (2.8 inches)79%high
June Weather14°C (58°F)85 mm (3.4 inches)81%very high
July Weather16°C (61°F)61 mm (2.4 inches)78%very high
August Weather15°C (60°F)72 mm (2.8 inches)79%high
September Weather13°C (56°F)60 mm (2.4 inches)85%high
October Weather10°C (51°F)90 mm (3.6 inches)90%moderate
November Weather7°C (45°F)77 mm (3.0 inches)91%low
December Weather6°C (42°F)93 mm (3.7 inches)89%low

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