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September Weather in Rhayader, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in Rhayader, United Kingdom is a mild 12°C (55°F). You'll experience a range from a chilly 1°C (34°F) to a pleasant 26°C (80°F). Be prepared for some rain, as precipitation totals around 85 mm (3.3 in) over 14 days. The air carries an average humidity of 85%, contributing to a refreshing atmosphere.

September Temperature in Rhayader

In September in Rhayader, the average temperature is 12°C (55°F). Maximums can reach 26°C (80°F), and minimums can be as low as 1°C (34°F). It’s advisable to pack layers to be prepared for both warm days and chilly evenings.

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

The chart illustrates September temperature patterns in Rhayader, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rhayader, September typically has an average temperature of 12°C (55°F), with highs reaching up to 26°C (80°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec394042455157595854494441
Data source: Temperature data for Rhayader 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 Rhayader

In Rhayader in September, the precipitation amount is 85 mm (3.3 in) over the course of 14 days.

September Precipitation Trends in Rhayader

The chart displays monthly precipitation patterns in Rhayader, 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 Rhayader, September typically receives around 85 mm (3.3 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec791151156088948210685123104129
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rhayader

In Rhayader in September humidity is 85%. With an average temperature of 12°C (55°F), this humidity feels like a thick, damp blanket wrapping around you, making every step feel heavier and less invigorating for traveling.

September Average Humidity in Rhayader

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

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

Maximum UV Index Levels in Rhayader for September

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

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

This table compares monthly weather conditions in Rhayader, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)79 mm (3.1 inches)89%low
February Weather4°C (40°F)115 mm (4.5 inches)88%low
March Weather5°C (42°F)115 mm (4.5 inches)86%moderate
April Weather7°C (46°F)60 mm (2.4 inches)84%high
May Weather10°C (51°F)88 mm (3.5 inches)79%high
June Weather14°C (57°F)94 mm (3.7 inches)81%very high
July Weather15°C (60°F)82 mm (3.2 inches)78%very high
August Weather14°C (58°F)106 mm (4.2 inches)79%high
September Weather12°C (55°F)85 mm (3.3 inches)85%high
October Weather10°C (50°F)123 mm (4.8 inches)90%moderate
November Weather6°C (44°F)104 mm (4.1 inches)91%low
December Weather5°C (41°F)129 mm (5.1 inches)89%low

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