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September Weather in Salmon, United States

Last updated: June 24, 2025

In September, the average temperature in Salmon, United States hovers around 13°C (55°F), offering a gentle climate ideal for exploration. However, be prepared for unexpected swings, as temperatures can dip to a chilly -3°C (26°F) or soar up to a warm 32°C (90°F). The month typically sees about 41 mm (1.6 in) of precipitation over 7 days, accompanied by an average humidity of 66%, providing a refreshingly mild atmosphere for your adventures.

September Temperature in Salmon

In September in Salmon, the average temperature is 13°C (55°F). Maximum temperatures can reach 32°C (90°F), while minimums can drop as low as -3°C (26°F). Be prepared for a wide range of weather conditions when planning your travels.

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

The chart illustrates September temperature patterns in Salmon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Salmon, September typically has an average temperature of 13°C (55°F), with highs reaching up to 32°C (90°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec172029344556666455372616
Data source: Temperature data for Salmon 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 Salmon

In Salmon in September, the precipitation amount is 41 mm (1.6 in) spread over a duration of 7 days.

September Precipitation Trends in Salmon

The chart displays monthly precipitation patterns in Salmon, 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 Salmon, September typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec459061678098253041585454
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Salmon

In Salmon in September, humidity is 66%. With an average temperature of 13°C (55°F), this humidity feels like a damp chill in the air, making outdoor activities invigorating but requiring a light jacket for comfort while exploring.

September Average Humidity in Salmon

This chart illustrates the average monthly humidity levels in Salmon, 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 Salmon is approximately 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec94%93%91%87%83%80%75%66%66%77%92%96%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Salmon

In Salmon 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 Salmon.

Maximum UV Index Levels in Salmon for September

The chart shows the monthly maximum UV Index (UVI) for Salmon 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 Salmon typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579111111108642
Data source: Salmon 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 Salmon Compares to Other Months

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

This table compares monthly weather conditions in Salmon, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)45 mm (1.8 inches)94%moderate
February Weather-7°C (20°F)90 mm (3.5 inches)93%moderate
March Weather-2°C (30°F)61 mm (2.4 inches)91%high
April Weather1°C (35°F)67 mm (2.6 inches)87%very high
May Weather7°C (45°F)80 mm (3.2 inches)83%extreme
June Weather13°C (56°F)97 mm (3.8 inches)80%extreme
July Weather19°C (66°F)25 mm (1.0 inches)75%extreme
August Weather18°C (64°F)30 mm (1.2 inches)66%very high
September Weather13°C (55°F)41 mm (1.6 inches)66%very high
October Weather3°C (38°F)58 mm (2.3 inches)77%high
November Weather-3°C (27°F)54 mm (2.1 inches)91%moderate
December Weather-9°C (17°F)54 mm (2.1 inches)96%low

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