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September Weather in Valley, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in Valley, United Kingdom is a mild 15°C (58°F), with minimums dipping to 5°C (41°F) and maximums reaching up to 27°C (81°F). Expect about 93 mm (3.6 in) of precipitation over 14 days, accompanied by a high average humidity of 85%, making for a refreshing yet damp atmosphere.

September Temperature in Valley

In September in Valley, the average temperature is 15°C (58°F), with maximums reaching 27°C (81°F) and minimums dropping as low as 5°C (41°F). This pleasant range makes it an ideal time to explore the outdoors and enjoy various activities.

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

The chart illustrates September temperature patterns in Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Valley, September typically has an average temperature of 15°C (58°F), with highs reaching up to 27°C (81°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec454546495459626158544946
Data source: Temperature data for Valley 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 Valley

In Valley in September, the total precipitation amount is 93 mm (3.6 in), occurring over the course of 14 days.

September Precipitation Trends in Valley

The chart displays monthly precipitation patterns in Valley, 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 Valley, September typically receives around 93 mm (3.6 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec739998506182669593130115125
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Valley

In Valley in September humidity is 85%. With an average temperature of 15°C (58°F), this humidity feels like an enveloping blanket, making travel feel sticky and heavy, often leading to a sense of discomfort that can drain your energy during outdoor explorations.

September Average Humidity in Valley

This chart illustrates the average monthly humidity levels in Valley, 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 Valley 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 Valley

In Valley in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Valley.

Maximum UV Index Levels in Valley for September

The chart shows the monthly maximum UV Index (UVI) for Valley 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 Valley typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Valley 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 Valley Compares to Other Months

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

This table compares monthly weather conditions in Valley, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)73 mm (2.9 inches)89%low
February Weather7°C (45°F)98 mm (3.9 inches)88%low
March Weather8°C (46°F)98 mm (3.9 inches)86%moderate
April Weather9°C (49°F)50 mm (2.0 inches)84%moderate
May Weather12°C (54°F)61 mm (2.4 inches)79%high
June Weather15°C (59°F)82 mm (3.2 inches)81%very high
July Weather16°C (62°F)66 mm (2.6 inches)78%very high
August Weather16°C (61°F)95 mm (3.7 inches)79%high
September Weather15°C (58°F)93 mm (3.6 inches)85%moderate
October Weather12°C (54°F)130 mm (5.1 inches)90%moderate
November Weather9°C (49°F)115 mm (4.5 inches)91%low
December Weather8°C (46°F)125 mm (4.9 inches)89%low

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