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August Weather in Idaho Falls, United States

Last updated: June 24, 2025

In August, the average temperature in Idaho Falls, United States is a pleasant 21°C (71°F). Expect a range with minimums dipping to 3°C (38°F) and highs reaching up to 36°C (97°F). During this month, you can anticipate about 16 mm (0.6 in) of precipitation over 3 days, alongside an average humidity of 49%.

August Temperature in Idaho Falls

In August in Idaho Falls, the average temperature is 21°C (71°F). The maximum can reach 36°C (97°F), while the minimum can drop as low as 3°C (38°F). This makes Idaho Falls a great destination for travelers seeking a diverse range of weather experiences.

August Weather in Idaho Falls: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Idaho Falls, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Idaho Falls, August typically has an average temperature of 21°C (71°F), with highs reaching up to 36°C (97°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec242737455464737161453526
Data source: Temperature data for Idaho Falls 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 Idaho Falls

In Idaho Falls in August, the precipitation amount is 16 mm (0.6 in), spread over a duration of 3 days.

August Precipitation Trends in Idaho Falls

The chart displays monthly precipitation patterns in Idaho Falls, 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 Idaho Falls, August typically receives around 16 mm (0.6 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec404843555831111627393241
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Idaho Falls

In Idaho Falls in August, humidity is 49%. With an average temperature of 21°C (71°F), this humidity feels like a comfortable embrace, making it ideal for leisurely strolls and sightseeing adventures.

August Average Humidity in Idaho Falls

This chart illustrates the average monthly humidity levels in Idaho Falls, 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 Idaho Falls is approximately 49%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec95%95%90%81%71%64%59%49%52%69%86%91%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Idaho Falls

In Idaho Falls 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 Idaho Falls.

Maximum UV Index Levels in Idaho Falls for August

The chart shows the monthly maximum UV Index (UVI) for Idaho Falls 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 Idaho Falls typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3578101111109643
Data source: Idaho Falls 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 Idaho Falls Compares to Other Months

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

This table compares monthly weather conditions in Idaho Falls, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)40 mm (1.6 inches)95%moderate
February Weather-3°C (27°F)48 mm (1.9 inches)95%moderate
March Weather3°C (37°F)43 mm (1.7 inches)90%high
April Weather7°C (45°F)55 mm (2.2 inches)81%very high
May Weather12°C (54°F)58 mm (2.3 inches)71%very high
June Weather18°C (65°F)31 mm (1.2 inches)64%extreme
July Weather23°C (74°F)11 mm (0.4 inches)59%extreme
August Weather21°C (71°F)16 mm (0.6 inches)49%very high
September Weather16°C (61°F)26 mm (1.0 inches)52%very high
October Weather7°C (45°F)39 mm (1.5 inches)69%high
November Weather2°C (36°F)32 mm (1.3 inches)86%moderate
December Weather-4°C (26°F)41 mm (1.6 inches)91%moderate

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