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September Weather in Llangynog, United Kingdom

Last updated: August 27, 2025

In Llangynog, United Kingdom, the average temperature for September hovers around 13°C (55°F). Expect a minimum chill of 1°C (33°F) and a warm peak of 26°C (80°F). During this month, you'll experience 91 mm (3.6 in) of precipitation spread over 14 days, contributing to a comfort level marked by an average humidity of 85%.

September Temperature in Llangynog

In September in Llangynog, the average temperature is 13°C (55°F). Maximums can reach 26°C (80°F) and minimums can be as low as 1°C (33°F). Travelers should be prepared for a mix of mild days and cool evenings, making layers a smart packing choice.

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

The chart illustrates September temperature patterns in Llangynog, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Llangynog, September typically has an average temperature of 13°C (55°F), with highs reaching up to 26°C (80°F) and lows dropping to around 1°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec394042465157605855504441
Data source: Temperature data for Llangynog 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 Llangynog

In Llangynog in September, the precipitation amount is 91 mm (3.6 in) over a span of 14 days.

September Precipitation Trends in Llangynog

The chart displays monthly precipitation patterns in Llangynog, 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 Llangynog, September typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec81118115597791761039111798132
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Llangynog

In Llangynog in September, humidity is 85%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making even short walks feel exhausting and urging travelers to seek shade and refreshment frequently.

September Average Humidity in Llangynog

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

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

Maximum UV Index Levels in Llangynog for September

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

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

This table compares monthly weather conditions in Llangynog, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)81 mm (3.2 inches)89%low
February Weather5°C (41°F)118 mm (4.6 inches)88%low
March Weather6°C (42°F)115 mm (4.5 inches)86%moderate
April Weather8°C (46°F)59 mm (2.3 inches)84%moderate
May Weather10°C (51°F)77 mm (3.0 inches)79%high
June Weather14°C (57°F)91 mm (3.6 inches)81%very high
July Weather15°C (60°F)76 mm (3.0 inches)78%very high
August Weather15°C (59°F)103 mm (4.1 inches)79%high
September Weather13°C (55°F)91 mm (3.6 inches)85%high
October Weather10°C (50°F)117 mm (4.6 inches)90%moderate
November Weather7°C (44°F)98 mm (3.9 inches)91%low
December Weather5°C (42°F)132 mm (5.2 inches)89%low

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