January Weather in Ketchum, United States

Last updated: June 24, 2025

In Ketchum, United States, the average temperature in January hovers around -8°C (17°F). However, you might experience a chilling minimum of -27°C (-16°F), with the mercury occasionally reaching a maximum of 2°C (36°F). Expect 56 mm (2.2 in) of precipitation spread over 10 days, and prepare for a high average humidity of 91%. Stay warm and dry!

January Temperature in Ketchum

In January in Ketchum, the average temperature is -8°C (17°F). Maximum temperatures can reach 2°C (36°F), while minimum temperatures can drop as low as -27°C (-16°F). It's essential to bundle up and prepare for extreme cold if you plan to travel during this time.

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

The chart illustrates January 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, January typically has an average temperature of -8°C (17°F), with highs reaching up to 2°C (36°F) and lows dropping to around -27°C (-16°F).

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

January Precipitation in Ketchum

In Ketchum in January, the precipitation amount is 56 mm (2.2 in) over the course of 10 days.

January Precipitation Trends in Ketchum

The chart displays monthly precipitation patterns in Ketchum, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Ketchum, January typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 10 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Ketchum

In Ketchum in January, humidity is 91%. With an average temperature of -8°C (17°F), this humidity feels like a chilly dampness that clings to your skin, making it uncomfortable for traveling as every step feels heavier and the cold seems to seep into your bones.

January Average Humidity in Ketchum

This chart illustrates the average monthly humidity levels in Ketchum, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Ketchum is approximately 91%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Ketchum

In Ketchum in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Ketchum, you can check the information here.

Maximum UV Index Levels in Ketchum for January

The chart shows the monthly maximum UV Index (UVI) for Ketchum in January, 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 January, the maximum UV index in Ketchum typically reaches 3, which falls under the moderate exposure category.

Data source: Ketchum January 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 January 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 January’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 January’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