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September Weather in Carstairs, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in Carstairs, United Kingdom hovers around 12°C (54°F). Visitors can expect temperatures to range from a chilly 1°C (34°F) to a warm 27°C (80°F). With an average precipitation of 87 mm (3.4 in) spread over 15 days, and humidity levels around 88%, it's advisable to prepare for both wet and humid conditions during your stay.

September Temperature in Carstairs

In September in Carstairs, the average temperature is 12°C (54°F). Maximums can reach 27°C (80°F), and minimums can be as low as 1°C (34°F). This varied climate makes Carstairs an ideal destination for travelers looking to experience a mix of mild and warm weather.

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

The chart illustrates September temperature patterns in Carstairs, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Carstairs, September typically has an average temperature of 12°C (54°F), with highs reaching up to 27°C (80°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec394042455156595854494340
Data source: Temperature data for Carstairs 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 Carstairs

In Carstairs in September, the precipitation amount is 87 mm (3.4 in) over the course of 15 days.

September Precipitation Trends in Carstairs

The chart displays monthly precipitation patterns in Carstairs, 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 Carstairs, September typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec761191024371106921258711886102
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Carstairs

In Carstairs 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 Carstairs

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

In Carstairs 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 Carstairs.

Maximum UV Index Levels in Carstairs for September

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

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

This table compares monthly weather conditions in Carstairs, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)76 mm (3.0 inches)90%low
February Weather4°C (40°F)119 mm (4.7 inches)88%low
March Weather5°C (42°F)102 mm (4.0 inches)86%moderate
April Weather7°C (45°F)43 mm (1.7 inches)85%moderate
May Weather10°C (51°F)71 mm (2.8 inches)80%high
June Weather13°C (56°F)106 mm (4.2 inches)83%very high
July Weather15°C (59°F)92 mm (3.6 inches)82%very high
August Weather14°C (58°F)125 mm (4.9 inches)82%high
September Weather12°C (54°F)87 mm (3.4 inches)88%moderate
October Weather9°C (49°F)118 mm (4.6 inches)90%moderate
November Weather6°C (43°F)86 mm (3.4 inches)92%low
December Weather4°C (40°F)102 mm (4.0 inches)89%low

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