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September Weather in Stanwell, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in Stanwell, United Kingdom hovers around 15°C (59°F). You can expect the temperature to fluctuate between a cool 3°C (38°F) and a warm 28°C (83°F). During this time, the region experiences an average precipitation of 45 mm (1.8 in) over approximately 10 days, with an average humidity of 82%.

September Temperature in Stanwell

In September in Stanwell, the average temperature is 15°C (59°F). The maximum can reach 28°C (83°F), while the minimum can drop as low as 3°C (38°F). Overall, this means travelers can expect mild weather perfect for exploring the outdoors.

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

The chart illustrates September temperature patterns in Stanwell, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Stanwell, September typically has an average temperature of 15°C (59°F), with highs reaching up to 28°C (83°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec414345495562656459534643
Data source: Temperature data for Stanwell 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 Stanwell

In Stanwell in September, the precipitation amount is 45 mm (1.8 in) spread over a duration of 10 days.

September Precipitation Trends in Stanwell

The chart displays monthly precipitation patterns in Stanwell, 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 Stanwell, September typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec525255336374646745865382
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Stanwell

In Stanwell in September, humidity is 82%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sticky and uncomfortable for travelers.

September Average Humidity in Stanwell

This chart illustrates the average monthly humidity levels in Stanwell, 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 Stanwell is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%79%81%71%76%82%91%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Stanwell

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

Maximum UV Index Levels in Stanwell for September

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

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

This table compares monthly weather conditions in Stanwell, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)52 mm (2.1 inches)91%low
February Weather6°C (43°F)52 mm (2.0 inches)89%low
March Weather7°C (46°F)55 mm (2.2 inches)86%moderate
April Weather10°C (49°F)33 mm (1.3 inches)85%moderate
May Weather13°C (55°F)63 mm (2.5 inches)79%high
June Weather16°C (62°F)74 mm (2.9 inches)80%very high
July Weather18°C (65°F)64 mm (2.5 inches)71%very high
August Weather18°C (64°F)67 mm (2.6 inches)76%high
September Weather15°C (59°F)45 mm (1.8 inches)82%high
October Weather12°C (53°F)86 mm (3.4 inches)90%moderate
November Weather8°C (47°F)53 mm (2.1 inches)92%low
December Weather6°C (44°F)82 mm (3.2 inches)92%low

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