August Weather in Ketchum, United States

Last updated: June 24, 2025

In Ketchum, United States, the average temperature in August hovers around 15°C (60°F), with a minimum drop to -3°C (27°F) and a peak reaching 30°C (86°F). This month typically sees about 33 mm (1.3 in) of precipitation over approximately 6 days, paired with an average humidity level of 42%.

August Temperature in Ketchum

In August in Ketchum, the average temperature is 15°C (60°F). The maximum can reach 30°C (86°F), and the minimum can be as low as -3°C (27°F). It's advisable to pack layers to accommodate the varying temperatures, ensuring a comfortable travel experience.

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

The chart illustrates August temperature patterns in Ketchum, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ketchum, August typically has an average temperature of 15°C (60°F), with highs reaching up to 30°C (86°F) and lows dropping to around -3°C (27°F).

Data source: Temperature data for Ketchum generated using information from the Copernicus Climate Change Service.

August Precipitation in Ketchum

In Ketchum, in August, the precipitation amount is 33 mm (1.3 in) over the course of 6 days.

August Precipitation Trends in Ketchum

The chart displays monthly precipitation patterns in Ketchum, 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 Ketchum, August typically receives around 33 mm (1.3 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

August Humidity in Ketchum

In Ketchum in August, humidity is 42%. With an average temperature of 15°C (60°F), this humidity feels like a refreshing breeze that gently cools you down while exploring the surroundings, making it comfortable for walking and sightseeing.

August Average Humidity in Ketchum

This chart illustrates the average monthly humidity levels in Ketchum, 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 Ketchum is approximately 42%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Ketchum

In Ketchum 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 Ketchum.

Maximum UV Index Levels in Ketchum for August

The chart shows the monthly maximum UV Index (UVI) for Ketchum 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 Ketchum typically reaches 10, which falls under the very high exposure category.

Data source: Ketchum 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 Ketchum Compares to Other Months

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

This table compares monthly weather conditions in Ketchum, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (17°F)	56 mm (2.2 inches)	91%	moderate
February Weather	-8°C (18°F)	86 mm (3.4 inches)	92%	moderate
March Weather	-3°C (26°F)	60 mm (2.4 inches)	85%	very high
April Weather	0°C (31°F)	52 mm (2.0 inches)	76%	very high
May Weather	4°C (40°F)	61 mm (2.4 inches)	66%	extreme
June Weather	11°C (52°F)	46 mm (1.8 inches)	62%	extreme
July Weather	16°C (62°F)	15 mm (0.6 inches)	53%	extreme
August Weather	15°C (60°F)	33 mm (1.3 inches)	42%	very high
September Weather	10°C (51°F)	30 mm (1.2 inches)	46%	very high
October Weather	2°C (35°F)	42 mm (1.6 inches)	64%	high
November Weather	-4°C (26°F)	46 mm (1.8 inches)	83%	moderate
December Weather	-9°C (16°F)	49 mm (1.9 inches)	87%	moderate