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September Weather in Stevenson, United States

Last updated: June 24, 2025

In Stevenson, United States, the average temperature in September hovers around 23°C (74°F). However, be prepared for a range, as temperatures can dip to a brisk 9°C (49°F) and soar up to a sweltering 35°C (95°F). During this month, expect 117 mm (4.6 in) of precipitation spread across approximately 9 days, with an average humidity of 64% keeping things feeling quite balmy.

September Temperature in Stevenson

In September in Stevenson, the average temperature is 23°C (74°F), with maximums reaching 35°C (95°F) and minimums dropping as low as 9°C (49°F). Be prepared for warm days and cooler evenings while enjoying your travels in Stevenson.

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

The chart illustrates September temperature patterns in Stevenson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Stevenson, September typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (95°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec424854607075787773645046
Data source: Temperature data for Stevenson 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 Stevenson

In Stevenson in September, the total precipitation amount is 117 mm (4.6 in) spread over a period of 9 days.

September Precipitation Trends in Stevenson

The chart displays monthly precipitation patterns in Stevenson, 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 Stevenson, September typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec10819119415610514111713711713877150
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Stevenson

In Stevenson in September, humidity is 64%. With an average temperature of 23°C (74°F), this humidity feels like a warm blanket wrapping around you, making outdoor exploration enjoyable yet slightly sticky, so it's best to stay hydrated and take breaks in the shade while traveling.

September Average Humidity in Stevenson

This chart illustrates the average monthly humidity levels in Stevenson, 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 Stevenson is approximately 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Stevenson

In Stevenson 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 Stevenson.

Maximum UV Index Levels in Stevenson for September

The chart shows the monthly maximum UV Index (UVI) for Stevenson 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 Stevenson typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111119764
Data source: Stevenson 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 Stevenson Compares to Other Months

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

This table compares monthly weather conditions in Stevenson, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)108 mm (4.3 inches)87%moderate
February Weather9°C (48°F)191 mm (7.5 inches)87%high
March Weather12°C (54°F)194 mm (7.6 inches)85%very high
April Weather16°C (60°F)156 mm (6.1 inches)82%very high
May Weather21°C (70°F)105 mm (4.1 inches)83%extreme
June Weather24°C (75°F)141 mm (5.5 inches)82%extreme
July Weather26°C (78°F)117 mm (4.6 inches)78%extreme
August Weather25°C (77°F)137 mm (5.4 inches)67%extreme
September Weather23°C (74°F)117 mm (4.6 inches)64%very high
October Weather18°C (64°F)138 mm (5.4 inches)74%high
November Weather10°C (50°F)77 mm (3.0 inches)87%high
December Weather8°C (46°F)150 mm (5.9 inches)88%moderate

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