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September Weather in South Chailey, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in South Chailey, United Kingdom hovers around 15°C (59°F), with a comfortable range that dips to a cool 2°C (37°F) and peaks at a warm 27°C (81°F). Be prepared for some rain, as 53 mm (2.1 in) of precipitation may fall over the course of 10 days. You'll also experience a high average humidity of 80%, making for a rich and vibrant atmosphere.

September Temperature in South Chailey

In September in South Chailey, the average temperature is 15°C (59°F). Maximum temperatures can reach 27°C (81°F), while minimums can drop as low as 2°C (37°F). It's a great time for travelers to enjoy mild weather and explore outdoor activities, so be sure to pack layers to accommodate the temperature fluctuations!

September Weather in South Chailey: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in South Chailey, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Chailey, September typically has an average temperature of 15°C (59°F), with highs reaching up to 27°C (81°F) and lows dropping to around 2°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec414346495561646359544744
Data source: Temperature data for South Chailey 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 South Chailey

In South Chailey in September, the precipitation amount is 53 mm (2.1 in) spread over a duration of 10 days.

September Precipitation Trends in South Chailey

The chart displays monthly precipitation patterns in South Chailey, 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 South Chailey, September typically receives around 53 mm (2.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec5760573565715870539267102
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in South Chailey

In South Chailey 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 South Chailey

This chart illustrates the average monthly humidity levels in South Chailey, 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 South Chailey 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 South Chailey

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

Maximum UV Index Levels in South Chailey for September

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

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

This table compares monthly weather conditions in South Chailey, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)57 mm (2.2 inches)91%low
February Weather6°C (43°F)60 mm (2.3 inches)89%low
March Weather8°C (46°F)57 mm (2.2 inches)86%moderate
April Weather9°C (49°F)35 mm (1.4 inches)85%moderate
May Weather13°C (55°F)65 mm (2.6 inches)82%high
June Weather16°C (61°F)71 mm (2.8 inches)81%very high
July Weather18°C (65°F)58 mm (2.3 inches)76%very high
August Weather17°C (64°F)70 mm (2.7 inches)73%high
September Weather15°C (59°F)53 mm (2.1 inches)80%high
October Weather12°C (54°F)92 mm (3.6 inches)89%moderate
November Weather8°C (47°F)67 mm (2.7 inches)92%low
December Weather7°C (44°F)102 mm (4.0 inches)92%low

Compare South Chailey's Climate with Cities Worldwide