nomadseason

September Weather in Brynmawr, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in Brynmawr, United Kingdom is a comfortable 13°C (56°F), with the mercury occasionally dipping to a chilly 2°C (36°F) and peaking at a warm 27°C (81°F). Expect about 80 mm (3.1 in) of precipitation spread over 12 days, contributing to an average humidity level of 79%.

September Temperature in Brynmawr

In September in Brynmawr, the average temperature is a comfortable 13°C (56°F), with maximums potentially reaching 27°C (81°F) and minimums dropping as low as 2°C (36°F). This makes it an ideal time for travelers looking to enjoy mild weather and outdoor activities.

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

The chart illustrates September temperature patterns in Brynmawr, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brynmawr, September typically has an average temperature of 13°C (56°F), with highs reaching up to 27°C (81°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec404143475258616056514542
Data source: Temperature data for Brynmawr generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Brynmawr

In Brynmawr in September, the total precipitation amount is 80 mm (3.1 in) spread over 12 days.

September Precipitation Trends in Brynmawr

The chart displays monthly precipitation patterns in Brynmawr, 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 Brynmawr, September typically receives around 80 mm (3.1 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec731121076491899110380132104129
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Brynmawr

In Brynmawr in September, humidity is 79%. With an average temperature of 13°C (56°F), this humidity feels like a damp, cool blanket wrapping around you, making traveling slightly uncomfortable and requiring you to dress in layers to stay comfortable while exploring.

September Average Humidity in Brynmawr

This chart illustrates the average monthly humidity levels in Brynmawr, 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 Brynmawr is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%84%80%80%70%73%79%89%90%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Brynmawr

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

Maximum UV Index Levels in Brynmawr for September

The chart shows the monthly maximum UV Index (UVI) for Brynmawr 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 Brynmawr typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124678876421
Data source: Brynmawr 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 Brynmawr Compares to Other Months

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

This table compares monthly weather conditions in Brynmawr, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)73 mm (2.9 inches)88%low
February Weather5°C (41°F)112 mm (4.4 inches)88%low
March Weather6°C (43°F)107 mm (4.2 inches)86%moderate
April Weather8°C (47°F)64 mm (2.5 inches)84%high
May Weather11°C (52°F)91 mm (3.6 inches)80%high
June Weather14°C (58°F)89 mm (3.5 inches)80%very high
July Weather16°C (62°F)91 mm (3.6 inches)70%very high
August Weather15°C (60°F)103 mm (4.1 inches)73%high
September Weather13°C (56°F)80 mm (3.1 inches)79%high
October Weather10°C (51°F)132 mm (5.2 inches)89%moderate
November Weather7°C (45°F)104 mm (4.1 inches)90%low
December Weather6°C (42°F)129 mm (5.1 inches)89%low

Compare Brynmawr's Climate with Cities Worldwide