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September Weather in Marstow, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in Marstow, United Kingdom is a comfortable 14°C (58°F), with variations ranging from a chilly 3°C (38°F) to a warm 29°C (84°F). Expect about 54 mm (2.1 in) of precipitation spread across 8 days, contributing to a relatively high average humidity of 79%. Perfect for those who enjoy a mild, humid climate!

September Temperature in Marstow

In September in Marstow, the average temperature is 14°C (58°F), with maximums reaching 29°C (84°F) and minimums dropping as low as 3°C (38°F). It's an ideal time for travelers to enjoy a range of outdoor activities while being prepared for fluctuations in temperature.

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

The chart illustrates September temperature patterns in Marstow, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marstow, September typically has an average temperature of 14°C (58°F), with highs reaching up to 29°C (84°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec414345495460646258534644
Data source: Temperature data for Marstow 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 Marstow

In Marstow in September, the total precipitation amount reaches 54 mm (2.1 in) over a span of 8 days.

September Precipitation Trends in Marstow

The chart displays monthly precipitation patterns in Marstow, 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 Marstow, September typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec546774527375637554987293
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Marstow

In Marstow in September, humidity is 79%. With an average temperature of 14°C (58°F), this humidity feels like an oppressive blanket wrapped around you, making even the mild temperatures feel heavier and more stifling for traveling.

September Average Humidity in Marstow

This chart illustrates the average monthly humidity levels in Marstow, 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 Marstow is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%84%80%80%70%73%79%89%90%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Marstow

In Marstow 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 Marstow, you can refer to this Hourly UV Index in Marstow.

Maximum UV Index Levels in Marstow for September

The chart shows the monthly maximum UV Index (UVI) for Marstow 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 Marstow typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578876421
Data source: Marstow 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 Marstow Compares to Other Months

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

This table compares monthly weather conditions in Marstow, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)54 mm (2.1 inches)88%low
February Weather6°C (43°F)67 mm (2.6 inches)88%low
March Weather7°C (45°F)74 mm (2.9 inches)86%moderate
April Weather9°C (49°F)52 mm (2.0 inches)84%moderate
May Weather12°C (54°F)73 mm (2.9 inches)80%high
June Weather16°C (61°F)75 mm (3.0 inches)80%very high
July Weather18°C (64°F)63 mm (2.5 inches)70%very high
August Weather17°C (62°F)75 mm (2.9 inches)73%high
September Weather14°C (58°F)54 mm (2.1 inches)79%high
October Weather11°C (53°F)98 mm (3.9 inches)89%moderate
November Weather8°C (47°F)72 mm (2.8 inches)90%low
December Weather7°C (44°F)93 mm (3.7 inches)89%low

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