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September Weather in Cwm, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in Cwm, United Kingdom hovers around 14°C (57°F). However, be prepared for a range of temperatures; lows can dip to 3°C (37°F) while highs can reach up to 27°C (81°F). Expect about 93 mm (3.7 in) of precipitation spread over 14 days, contributing to a robust average humidity of 85%. Embrace the diverse climate this month brings!

September Temperature in Cwm

In September, in Cwm, the average temperature is 14°C (57°F). Maximum temperatures can reach 27°C (81°F), while minimums can drop as low as 3°C (37°F). This pleasant variability makes it an ideal time for travelers to explore the outdoor attractions and enjoy the local scenery.

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

The chart illustrates September temperature patterns in Cwm, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cwm, September typically has an average temperature of 14°C (57°F), with highs reaching up to 27°C (81°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec424344485359616157524643
Data source: Temperature data for Cwm 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 Cwm

In Cwm, in September, the precipitation amount is 93 mm (3.7 in) over the course of 14 days.

September Precipitation Trends in Cwm

The chart displays monthly precipitation patterns in Cwm, 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 Cwm, September typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec6683895467989291939782106
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Cwm

In Cwm in September, humidity is 85%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making travel feel heavy and sluggish.

September Average Humidity in Cwm

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

In Cwm 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 Cwm.

Maximum UV Index Levels in Cwm for September

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

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

This table compares monthly weather conditions in Cwm, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)66 mm (2.6 inches)89%low
February Weather6°C (43°F)83 mm (3.3 inches)88%low
March Weather7°C (45°F)88 mm (3.5 inches)86%moderate
April Weather9°C (48°F)54 mm (2.1 inches)84%moderate
May Weather12°C (53°F)67 mm (2.6 inches)79%high
June Weather15°C (59°F)98 mm (3.9 inches)81%very high
July Weather16°C (62°F)92 mm (3.6 inches)78%very high
August Weather16°C (61°F)91 mm (3.6 inches)79%high
September Weather14°C (57°F)93 mm (3.7 inches)85%moderate
October Weather11°C (52°F)97 mm (3.8 inches)90%moderate
November Weather8°C (47°F)82 mm (3.2 inches)91%low
December Weather6°C (44°F)106 mm (4.2 inches)89%low

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