July Weather in Boise, United States

Last updated: June 24, 2025

In July, the average temperature in Boise, United States reaches a delightful 27°C (81°F). Expect a range from a cool 11°C (51°F) to a sizzling 41°C (106°F). Precipitation is minimal, with just 1 mm (0.0 in) recorded over 0 days, keeping the weather pleasantly dry. The average humidity sits at 66%, adding a touch of warmth to those sunny days.

July Temperature in Boise

In July in Boise, the average temperature is 27°C (81°F). Maximums can reach 41°C (106°F) and minimums can be as low as 11°C (51°F). Travelers should be prepared for a wide range of temperatures and plan their activities accordingly.

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

The chart illustrates July temperature patterns in Boise, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boise, July typically has an average temperature of 27°C (81°F), with highs reaching up to 41°C (106°F) and lows dropping to around 11°C (51°F).

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

July Precipitation in Boise

In Boise in July, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.

July Precipitation Trends in Boise

The chart displays monthly precipitation patterns in Boise, 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 Boise, July typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 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 Boise

In Boise in July, humidity is 66%. With an average temperature of 27°C (81°F), this humidity feels like a warm, sticky embrace, making outdoor exploration feel a bit more intense while increasing the need for hydration as you navigate through the sights.

July Average Humidity in Boise

This chart illustrates the average monthly humidity levels in Boise, 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 Boise is approximately 66%, 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 Boise

In Boise 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 Boise.

Maximum UV Index Levels in Boise for July

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

Data source: Boise 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 Boise Compares to Other Months

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

This table compares monthly weather conditions in Boise, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (33°F)	49 mm (1.9 inches)	88%	moderate
February Weather	2°C (36°F)	50 mm (2.0 inches)	89%	moderate
March Weather	8°C (46°F)	38 mm (1.5 inches)	85%	high
April Weather	11°C (52°F)	36 mm (1.4 inches)	79%	very high
May Weather	16°C (61°F)	39 mm (1.5 inches)	71%	very high
June Weather	21°C (71°F)	21 mm (0.8 inches)	71%	extreme
July Weather	27°C (81°F)	1 mm (0.0 inches)	66%	extreme
August Weather	26°C (78°F)	8 mm (0.3 inches)	50%	very high
September Weather	20°C (68°F)	10 mm (0.4 inches)	48%	very high
October Weather	11°C (53°F)	22 mm (0.9 inches)	65%	high
November Weather	6°C (43°F)	32 mm (1.3 inches)	84%	moderate
December Weather	1°C (34°F)	40 mm (1.6 inches)	87%	low