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September Weather in Penysarn, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in Penysarn, United Kingdom hovers around 15°C (59°F), with a minimum of 10°C (50°F) and a maximum of 21°C (70°F). Expect 109 mm (4.3 in) of precipitation spread over 15 days, contributing to an average humidity of 85%. Brace yourself for a comfortably cool yet damp month!

September Temperature in Penysarn

In September in Penysarn, the average temperature is 15°C (59°F). Maximums can reach 21°C (70°F), while minimums can drop to as low as 10°C (50°F). This mild weather makes it an ideal time for outdoor exploration and sightseeing.

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

The chart illustrates September temperature patterns in Penysarn, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Penysarn, September typically has an average temperature of 15°C (59°F), with highs reaching up to 21°C (70°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec454545475156596058555047
Data source: Temperature data for Penysarn 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 Penysarn

In Penysarn in September, the precipitation amount is 109 mm (4.3 in) spread over 15 days.

September Precipitation Trends in Penysarn

The chart displays monthly precipitation patterns in Penysarn, 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 Penysarn, September typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec91102954351817593109147138148
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Penysarn

In Penysarn in September, humidity is 85%. With an average temperature of 15°C (59°F), this humidity feels like a warm, damp blanket wrapping around you, making traveling quite uncomfortable and sticky. Be prepared to take frequent breaks and stay hydrated as you navigate the lush, but humid environment.

September Average Humidity in Penysarn

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

In Penysarn 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 Penysarn.

Maximum UV Index Levels in Penysarn for September

The chart shows the monthly maximum UV Index (UVI) for Penysarn 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 Penysarn typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Penysarn 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 Penysarn Compares to Other Months

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

This table compares monthly weather conditions in Penysarn, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)91 mm (3.6 inches)89%low
February Weather7°C (45°F)102 mm (4.0 inches)88%low
March Weather7°C (45°F)95 mm (3.7 inches)86%moderate
April Weather8°C (48°F)43 mm (1.7 inches)84%moderate
May Weather11°C (52°F)51 mm (2.0 inches)79%high
June Weather13°C (56°F)81 mm (3.2 inches)81%very high
July Weather15°C (60°F)75 mm (2.9 inches)78%very high
August Weather16°C (60°F)93 mm (3.6 inches)79%high
September Weather15°C (59°F)109 mm (4.3 inches)85%moderate
October Weather13°C (55°F)146 mm (5.8 inches)90%moderate
November Weather10°C (50°F)138 mm (5.4 inches)91%low
December Weather8°C (47°F)148 mm (5.8 inches)89%low

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