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September Weather in Wallowa, United States

Last updated: June 24, 2025

In September, the average temperature in Wallowa, United States hovers around 13°C (55°F). However, temperatures can vary significantly, with minimums plummeting to -4°C (25°F) and maximums soaring to 33°C (91°F). Prepare for some wet days, as the area receives an average precipitation of 45 mm (1.8 in) over about 7 days. The average humidity during this time is around 58%, contributing to the overall climate experience.

September Temperature in Wallowa

In September in Wallowa, the average temperature is 13°C (55°F), with maximums reaching up to 33°C (91°F) and minimums dropping as low as -4°C (25°F). This diverse range in temperatures makes it essential for travelers to pack accordingly for both warm and chilly weather.

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

The chart illustrates September temperature patterns in Wallowa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wallowa, September typically has an average temperature of 13°C (55°F), with highs reaching up to 33°C (91°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec262633384655666455413226
Data source: Temperature data for Wallowa 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 Wallowa

In Wallowa in September, the precipitation amount is 45 mm (1.8 in) spread over a duration of 7 days.

September Precipitation Trends in Wallowa

The chart displays monthly precipitation patterns in Wallowa, 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 Wallowa, September typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec911471079393601134457990101
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Wallowa

In Wallowa in September humidity is 58%. With an average temperature of 13°C (55°F), this humidity feels like a cool, crisp day that refreshes your senses while you explore, making it perfect for leisurely walks and sightseeing without feeling overheated.

September Average Humidity in Wallowa

This chart illustrates the average monthly humidity levels in Wallowa, 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 Wallowa is approximately 58%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%85%83%77%81%77%60%58%75%85%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Wallowa

In Wallowa 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 Wallowa.

Maximum UV Index Levels in Wallowa for September

The chart shows the monthly maximum UV Index (UVI) for Wallowa 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 Wallowa typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec347810101098532
Data source: Wallowa 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 Wallowa Compares to Other Months

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

This table compares monthly weather conditions in Wallowa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)90 mm (3.6 inches)86%moderate
February Weather-3°C (26°F)147 mm (5.8 inches)86%moderate
March Weather1°C (33°F)107 mm (4.2 inches)85%high
April Weather3°C (38°F)93 mm (3.6 inches)83%very high
May Weather8°C (46°F)93 mm (3.7 inches)77%very high
June Weather13°C (56°F)60 mm (2.4 inches)81%very high
July Weather19°C (66°F)11 mm (0.4 inches)76%very high
August Weather18°C (65°F)34 mm (1.3 inches)60%very high
September Weather13°C (55°F)45 mm (1.8 inches)58%very high
October Weather5°C (41°F)79 mm (3.1 inches)75%moderate
November Weather0°C (32°F)90 mm (3.5 inches)85%moderate
December Weather-4°C (26°F)101 mm (4.0 inches)87%low

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