nomadseason

September Weather in Red Lion, United States

Last updated: June 24, 2025

In September, the average temperature in Red Lion, United States hovers around 21°C (70°F), offering a pleasant climate. Expect minimum temperatures to drop to 5°C (42°F), while the mercury can rise as high as 34°C (93°F). During this month, precipitation levels reach 108 mm (4.2 in) over approximately 9 days, contributing to an average humidity of 75%. Stay prepared for captivating weather contrasts!

September Temperature in Red Lion

In September in Red Lion, the average temperature is 21°C (70°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 5°C (42°F). This range makes Red Lion a perfect destination for travelers seeking both warm days and cooler evenings.

September Weather in Red Lion: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Red Lion, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Red Lion, September typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (93°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec343843546473787670604538
Data source: Temperature data for Red Lion generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Red Lion

In Red Lion in September, the precipitation amount is 108 mm (4.2 in) spread over 9 days.

September Precipitation Trends in Red Lion

The chart displays monthly precipitation patterns in Red Lion, 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 Red Lion, September typically receives around 108 mm (4.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec601019998125971301301081018893
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Red Lion

In Red Lion in September, humidity is 75%. With an average temperature of 21°C (70°F), this humidity feels like a warm, enveloping blanket that makes exploring the area feel slightly sticky, requiring travelers to stay hydrated and take occasional breaks in the shade to fully enjoy their adventures.

September Average Humidity in Red Lion

This chart illustrates the average monthly humidity levels in Red Lion, 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 Red Lion is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%81%78%79%74%72%75%81%85%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Red Lion

In Red Lion in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Red Lion.

Maximum UV Index Levels in Red Lion for September

The chart shows the monthly maximum UV Index (UVI) for Red Lion 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 Red Lion typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Red Lion 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 Red Lion Compares to Other Months

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

This table compares monthly weather conditions in Red Lion, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)60 mm (2.4 inches)84%moderate
February Weather3°C (38°F)101 mm (4.0 inches)83%moderate
March Weather6°C (44°F)99 mm (3.9 inches)83%high
April Weather12°C (54°F)98 mm (3.9 inches)81%very high
May Weather18°C (64°F)125 mm (4.9 inches)78%very high
June Weather23°C (73°F)97 mm (3.8 inches)79%very high
July Weather26°C (79°F)130 mm (5.1 inches)74%very high
August Weather24°C (76°F)130 mm (5.1 inches)72%very high
September Weather21°C (70°F)108 mm (4.2 inches)75%very high
October Weather16°C (60°F)101 mm (4.0 inches)81%high
November Weather7°C (45°F)88 mm (3.5 inches)85%moderate
December Weather4°C (39°F)93 mm (3.7 inches)84%low

Compare Red Lion's Climate with Cities Worldwide