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September Weather in Cumnock, United Kingdom

Last updated: August 27, 2025

In Cumnock, United Kingdom, the average temperature in September is a comfortable 12°C (54°F). However, be prepared for a range of conditions, as the temperature can drop to a chilly -1°C (31°F) or rise to a warm 26°C (79°F). During this month, expect 104 mm (4.1 in) of precipitation spread over approximately 18 days, and embrace the high average humidity of 88%.

September Temperature in Cumnock

In September in Cumnock, the average temperature is 12°C (54°F). Maximums can reach 26°C (79°F) and minimums can be as low as -1°C (31°F). Be prepared for a range of temperatures, making it ideal for layering your clothing when traveling to Cumnock this month.

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

The chart illustrates September temperature patterns in Cumnock, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cumnock, September typically has an average temperature of 12°C (54°F), with highs reaching up to 26°C (79°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec404042455156585854494441
Data source: Temperature data for Cumnock 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 Cumnock

In Cumnock in September, the total precipitation amount is 104 mm (4.1 in), occurring over the course of 18 days.

September Precipitation Trends in Cumnock

The chart displays monthly precipitation patterns in Cumnock, 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 Cumnock, September typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec1011371124866108100129105141116129
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Cumnock

In Cumnock in September, humidity is 88%. With an average temperature of 12°C (54°F), this humidity feels like a thick, damp blanket, making traveling a bit uncomfortable as the air clings to your skin, causing you to sweat even in cooler weather.

September Average Humidity in Cumnock

This chart illustrates the average monthly humidity levels in Cumnock, 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 Cumnock is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%85%81%83%82%82%88%90%92%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Cumnock

In Cumnock 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 Cumnock.

Maximum UV Index Levels in Cumnock for September

The chart shows the monthly maximum UV Index (UVI) for Cumnock 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 Cumnock typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123568865311
Data source: Cumnock 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 Cumnock Compares to Other Months

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

This table compares monthly weather conditions in Cumnock, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)101 mm (4.0 inches)90%low
February Weather5°C (41°F)137 mm (5.4 inches)88%low
March Weather6°C (42°F)112 mm (4.4 inches)86%moderate
April Weather7°C (46°F)48 mm (1.9 inches)85%moderate
May Weather10°C (51°F)66 mm (2.6 inches)80%high
June Weather13°C (56°F)108 mm (4.3 inches)83%very high
July Weather15°C (59°F)99 mm (3.9 inches)82%very high
August Weather14°C (58°F)129 mm (5.1 inches)82%high
September Weather12°C (54°F)104 mm (4.1 inches)88%moderate
October Weather10°C (49°F)141 mm (5.6 inches)90%moderate
November Weather7°C (44°F)116 mm (4.6 inches)92%low
December Weather5°C (41°F)129 mm (5.1 inches)89%low

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