July Weather in Challis, United States

Last updated: June 24, 2025

In July, the average temperature in Challis, United States is a pleasant 18°C (65°F). However, temperatures can fluctuate, with minimums dipping to 2°C (36°F) and highs reaching up to 31°C (89°F). Expect some rain, as the area sees about 18 mm (0.7 in) of precipitation over 6 days. The average humidity is around 75%, contributing to a humid yet comfortable atmosphere.

July Temperature in Challis

In July, in Challis, the average temperature is 18°C (65°F). Maximums can reach 31°C (89°F) and minimums can be as low as 2°C (36°F). This makes Challis an ideal destination for travelers seeking a mild climate with the possibility of warm days and cool evenings.

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

The chart illustrates July 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, July typically has an average temperature of 18°C (65°F), with highs reaching up to 31°C (89°F) and lows dropping to around 2°C (36°F).

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

July Precipitation in Challis

In Challis in July, the precipitation amount is 18 mm (0.7 in) over the course of 6 days.

July Precipitation Trends in Challis

The chart displays monthly precipitation patterns in Challis, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Challis, July typically receives around 18 mm (0.7 inches) of precipitation spread over approximately 6 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Challis

In Challis in July, humidity is 75%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket that can make outdoor exploration feel a bit stifling, potentially leading to discomfort during travel activities.

July Average Humidity in Challis

This chart illustrates the average monthly humidity levels in Challis, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Challis is approximately 75%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Challis

In Challis in July, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Challis.

Maximum UV Index Levels in Challis for July

The chart shows the monthly maximum UV Index (UVI) for Challis in July, 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 July, the maximum UV index in Challis typically reaches 11, which falls under the extreme exposure category.

Data source: Challis July 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 July 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 July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
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 Weather	0°C (33°F)	49 mm (1.9 inches)	87%	very high
May Weather	6°C (44°F)	68 mm (2.7 inches)	83%	extreme
June Weather	13°C (55°F)	59 mm (2.3 inches)	80%	extreme
July Weather	18°C (65°F)	18 mm (0.7 inches)	75%	extreme
August Weather	17°C (63°F)	23 mm (0.9 inches)	66%	very high
September Weather	12°C (54°F)	30 mm (1.2 inches)	66%	very high
October Weather	3°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