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September Weather in Alderson, United States

Last updated: June 24, 2025

In September, the average temperature in Alderson, United States hovers around 19°C (66°F). Expect a comfortable range, with minimums dipping to 3°C (37°F) and maximums peaking at 32°C (90°F). During this month, you'll encounter approximately 86 mm (3.4 in) of precipitation over 10 days, contributing to an average humidity of 68%. Whether you’re seeking outdoor adventures or cozy indoor activities, be prepared for varying weather!

September Temperature in Alderson

In September in Alderson, the average temperature is 19°C (66°F). Maximum temperatures can reach 32°C (90°F), while minimum temperatures can drop to as low as 3°C (37°F). Be sure to pack a variety of clothing to accommodate both warm and cool weather during your travels.

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

The chart illustrates September temperature patterns in Alderson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alderson, September typically has an average temperature of 19°C (66°F), with highs reaching up to 32°C (90°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec333843526167727066564237
Data source: Temperature data for Alderson 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 Alderson

In Alderson in September, the precipitation amount is 86 mm (3.4 in) over the course of 10 days.

September Precipitation Trends in Alderson

The chart displays monthly precipitation patterns in Alderson, 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 Alderson, September typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec81142104128137977485871146998
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Alderson

In Alderson in September humidity is 68%. With an average temperature of 19°C (66°F), this humidity feels like a warm embrace, creating a sticky atmosphere that can be a bit uncomfortable for traveling.

September Average Humidity in Alderson

This chart illustrates the average monthly humidity levels in Alderson, 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 Alderson is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%84%83%83%79%66%68%78%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Alderson

In Alderson in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Alderson.

Maximum UV Index Levels in Alderson for September

The chart shows the monthly maximum UV Index (UVI) for Alderson 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 Alderson typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109753
Data source: Alderson 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 Alderson Compares to Other Months

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

This table compares monthly weather conditions in Alderson, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)81 mm (3.2 inches)87%moderate
February Weather3°C (39°F)142 mm (5.6 inches)87%high
March Weather6°C (44°F)104 mm (4.1 inches)86%very high
April Weather11°C (52°F)128 mm (5.0 inches)84%very high
May Weather16°C (61°F)137 mm (5.4 inches)83%extreme
June Weather20°C (68°F)97 mm (3.8 inches)83%extreme
July Weather22°C (72°F)74 mm (2.9 inches)79%extreme
August Weather21°C (71°F)85 mm (3.3 inches)66%very high
September Weather19°C (66°F)86 mm (3.4 inches)68%very high
October Weather13°C (56°F)114 mm (4.5 inches)78%high
November Weather5°C (42°F)69 mm (2.7 inches)89%moderate
December Weather3°C (38°F)98 mm (3.9 inches)86%moderate

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