October Weather in Ketchum, United States

Last updated: June 24, 2025

In Ketchum, United States, the average temperature in October hovers around 2°C (35°F). Visitors should brace for a wide temperature range, with minimums plunging to -24°C (-11°F) and maximums reaching 22°C (71°F). Expect 42 mm (1.6 in) of precipitation spread over 7 days, accompanied by an average humidity of 64%. Prepare for a variety of weather conditions!

October Temperature in Ketchum

In October in Ketchum, the average temperature is 2°C (35°F). Maximums can reach 22°C (71°F), and minimums can be as low as -24°C (-11°F). It's important to prepare for a wide range of temperatures when traveling during this month.

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

The chart illustrates October 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, October typically has an average temperature of 2°C (35°F), with highs reaching up to 22°C (71°F) and lows dropping to around -24°C (-11°F).

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

October Precipitation in Ketchum

In Ketchum in October, the total precipitation amount is 42 mm (1.6 in) accumulated over a span of 7 days.

October Precipitation Trends in Ketchum

The chart displays monthly precipitation patterns in Ketchum, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Ketchum, October typically receives around 42 mm (1.6 inches) of precipitation spread over approximately 7 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Ketchum

In Ketchum in October, humidity is 64%. With an average temperature of 2°C (35°F), this humidity feels like a chilly embrace that can make outdoor activities brisk but refreshing. Travelers should be prepared with warm clothing, as the damp air can seep into layers and create a biting sensation, making exploration invigorating yet brisk.

October Average Humidity in Ketchum

This chart illustrates the average monthly humidity levels in Ketchum, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Ketchum is approximately 64%, offering insight into how humid the weather typically is during this month.

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

October UV Index in Ketchum

In Ketchum in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Ketchum, you can refer to this Hourly UV Index in Ketchum.

Maximum UV Index Levels in Ketchum for October

The chart shows the monthly maximum UV Index (UVI) for Ketchum in October, 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 October, the maximum UV index in Ketchum typically reaches 6, which falls under the high exposure category.

Data source: Ketchum October 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 October 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 October’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 October’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