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September Weather in Walton-on-Thames, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in Walton-on-Thames, 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 Walton-on-Thames

In September in Walton-on-Thames, 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 Walton-on-Thames: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Walton-on-Thames, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Walton-on-Thames, 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 Walton-on-Thames 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 Walton-on-Thames

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

September Precipitation Trends in Walton-on-Thames

The chart displays monthly precipitation patterns in Walton-on-Thames, 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 Walton-on-Thames, 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 Walton-on-Thames

In Walton-on-Thames 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 Walton-on-Thames

This chart illustrates the average monthly humidity levels in Walton-on-Thames, 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 Walton-on-Thames 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 Walton-on-Thames

In Walton-on-Thames 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 Walton-on-Thames, you can refer to this Hourly UV Index in Walton-on-Thames.

Maximum UV Index Levels in Walton-on-Thames for September

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

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

This table compares monthly weather conditions in Walton-on-Thames, 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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