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September Weather in Westerham, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in Westerham, United Kingdom hovers around 15°C (59°F). Expect a minimum chill of 3°C (38°F) and a warm maximum of 28°C (83°F). Prepare for some rain, as 48 mm (1.9 in) of precipitation typically falls over 9 days, accompanied by a humid 80% atmosphere.

September Temperature in Westerham

In September in Westerham, 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 Westerham: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Westerham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Westerham, 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).
JanFebMarAprMayJunJulAugSepOctNovDec414345495561656359534643
Data source: Temperature data for Westerham 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 Westerham

In Westerham in September, the total precipitation amount is 48 mm (1.9 in) spread over 9 days.

September Precipitation Trends in Westerham

The chart displays monthly precipitation patterns in Westerham, 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 Westerham, September typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec575956366688667948855692
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Westerham

In Westerham in September, humidity is 80%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket enveloping you, making outdoor activities slightly uncomfortable and necessitating frequent breaks to stay hydrated.

September Average Humidity in Westerham

This chart illustrates the average monthly humidity levels in Westerham, 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 Westerham is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%82%81%76%73%80%89%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Westerham

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

Maximum UV Index Levels in Westerham for September

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

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

This table compares monthly weather conditions in Westerham, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)56 mm (2.2 inches)91%low
February Weather6°C (43°F)59 mm (2.3 inches)89%low
March Weather7°C (46°F)56 mm (2.2 inches)86%moderate
April Weather9°C (49°F)36 mm (1.4 inches)85%moderate
May Weather13°C (55°F)66 mm (2.6 inches)82%high
June Weather16°C (62°F)87 mm (3.4 inches)81%very high
July Weather18°C (65°F)66 mm (2.6 inches)76%very high
August Weather17°C (64°F)79 mm (3.1 inches)73%high
September Weather15°C (59°F)48 mm (1.9 inches)80%high
October Weather12°C (53°F)85 mm (3.4 inches)89%moderate
November Weather8°C (46°F)56 mm (2.2 inches)92%low
December Weather6°C (44°F)92 mm (3.6 inches)92%low

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