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August Weather in Challis, United States

Last updated: June 24, 2025

In August, the average temperature in Challis, United States hovers around 17°C (63°F). Expect a comfortable range where the minimum can dip to 1°C (34°F), while the mercury can rise to a warm 33°C (91°F). With 23 mm (0.9 in) of precipitation spread over 7 days, you might want to keep an umbrella handy. The average humidity settles at a pleasant 66%, making for a generally enjoyable climate.

August Temperature in Challis

In August in Challis, the average temperature is 17°C (63°F). Maximums can reach 33°C (91°F) and minimums can be as low as 1°C (34°F). Be sure to pack layers to accommodate the wide temperature range while exploring.

August Weather in Challis: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Challis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Challis, August typically has an average temperature of 17°C (63°F), with highs reaching up to 33°C (91°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec151827324355656353372716
Data source: Temperature data for Challis 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.

August Precipitation in Challis

In Challis in August, the total precipitation amount is 23 mm (0.9 in) over a duration of 7 days.

August Precipitation Trends in Challis

The chart displays monthly precipitation patterns in Challis, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Challis, August typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec346541496859182330423438
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Challis

In Challis in August, humidity is 66%. With an average temperature of 17°C (63°F), this humidity feels like a warm embrace, making travel refreshing yet slightly muggy, perfect for leisurely strolls or picturesque outdoor explorations, but travelers should be prepared for occasional discomfort as they navigate the vibrant sights.

August Average Humidity in Challis

This chart illustrates the average monthly humidity levels in Challis, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Challis 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 August generated using information from the Copernicus Climate Change Service.

August UV Index in Challis

In Challis in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Challis.

Maximum UV Index Levels in Challis for August

The chart shows the monthly maximum UV Index (UVI) for Challis in August, 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 August, the maximum UV index in Challis typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589111111109642
Data source: Challis August 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 August Weather in Challis Compares to Other Months

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

This table compares monthly weather conditions in Challis, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)34 mm (1.3 inches)94%moderate
February Weather-8°C (18°F)65 mm (2.6 inches)93%moderate
March Weather-3°C (27°F)40 mm (1.6 inches)91%very high
April Weather0°C (33°F)49 mm (1.9 inches)87%very high
May Weather6°C (44°F)68 mm (2.7 inches)83%extreme
June Weather13°C (55°F)59 mm (2.3 inches)80%extreme
July Weather18°C (65°F)18 mm (0.7 inches)75%extreme
August Weather17°C (63°F)23 mm (0.9 inches)66%very high
September Weather12°C (54°F)30 mm (1.2 inches)66%very high
October Weather3°C (37°F)42 mm (1.7 inches)77%high
November Weather-3°C (27°F)34 mm (1.3 inches)91%moderate
December Weather-9°C (16°F)38 mm (1.5 inches)96%low

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