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September Weather in Asotin, United States

Last updated: June 24, 2025

In Asotin, United States, the average temperature in September hovers around 17°C (64°F). Expect a minimum chill of 2°C (36°F) and the occasional peak of 37°C (98°F). Rainfall is moderate, with 25 mm (1.0 in) expected over 4 days. The air maintains an average humidity of 62%, making for a pleasantly warm atmosphere.

September Temperature in Asotin

In September in Asotin, the average temperature is 17°C (64°F), with maximums reaching up to 37°C (98°F) and minimums dropping as low as 2°C (36°F). It's advisable to pack versatile clothing to accommodate both warm days and cool evenings while exploring.

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

The chart illustrates September temperature patterns in Asotin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Asotin, September typically has an average temperature of 17°C (64°F), with highs reaching up to 37°C (98°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec323340475665757463493933
Data source: Temperature data for Asotin 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 Asotin

In Asotin in September, the precipitation amount is 25 mm (1.0 in) over the course of 4 days.

September Precipitation Trends in Asotin

The chart displays monthly precipitation patterns in Asotin, 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 Asotin, September typically receives around 25 mm (1.0 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec50906559554031425476061
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Asotin

In Asotin in September humidity is 62%. With an average temperature of 17°C (64°F), this humidity feels like a refreshing embrace, making for pleasant travel conditions that invigorate the senses while encouraging leisurely strolls and outdoor exploration.

September Average Humidity in Asotin

This chart illustrates the average monthly humidity levels in Asotin, 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 Asotin is approximately 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%89%87%84%78%78%77%64%62%79%87%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Asotin

In Asotin in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Asotin.

Maximum UV Index Levels in Asotin for September

The chart shows the monthly maximum UV Index (UVI) for Asotin 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 Asotin typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689101097532
Data source: Asotin 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 Asotin Compares to Other Months

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

This table compares monthly weather conditions in Asotin, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)50 mm (2.0 inches)89%low
February Weather0°C (33°F)90 mm (3.5 inches)89%moderate
March Weather5°C (41°F)65 mm (2.5 inches)87%high
April Weather9°C (48°F)59 mm (2.3 inches)84%very high
May Weather13°C (57°F)55 mm (2.2 inches)77%very high
June Weather18°C (65°F)40 mm (1.6 inches)78%very high
July Weather24°C (75°F)3 mm (0.1 inches)77%very high
August Weather23°C (74°F)14 mm (0.5 inches)64%very high
September Weather17°C (64°F)25 mm (1.0 inches)62%high
October Weather10°C (49°F)47 mm (1.9 inches)79%moderate
November Weather4°C (39°F)60 mm (2.4 inches)87%moderate
December Weather1°C (33°F)61 mm (2.4 inches)90%low

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