July Weather in Helena, United States

Last updated: June 24, 2025

In July, the average temperature in Helena, United States is a warm 28°C (82°F), making it an inviting destination. Daytime highs can reach up to 35°C (96°F), while the nights cool down to a pleasant 17°C (64°F). Expect 124 mm (4.9 in) of precipitation over approximately 11 days, contributing to an average humidity of 81%—perfect for lush landscapes.

July Temperature in Helena

In July in Helena, the average temperature is 28°C (82°F), with maximums reaching up to 35°C (96°F) and minimums dropping as low as 17°C (64°F). This makes it an ideal time for outdoor activities and exploring the local attractions, so be sure to pack accordingly for both warm and cooler moments.

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

The chart illustrates July temperature patterns in Helena, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Helena, July typically has an average temperature of 28°C (82°F), with highs reaching up to 35°C (96°F) and lows dropping to around 17°C (64°F).

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

July Precipitation in Helena

In Helena in July, the precipitation amount is 124 mm (4.9 in) over the course of 11 days.

July Precipitation Trends in Helena

The chart displays monthly precipitation patterns in Helena, 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 Helena, July typically receives around 124 mm (4.9 inches) of precipitation spread over approximately 11 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 Helena

In Helena in July, humidity is 81%. With an average temperature of 28°C (82°F), this humidity feels like a warm blanket wrapped around you, making traveling somewhat uncomfortable as the air thickens, leaving you longing for a refreshing breeze.

July Average Humidity in Helena

This chart illustrates the average monthly humidity levels in Helena, 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 Helena is approximately 81%, 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 Helena

In Helena 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 Helena.

Maximum UV Index Levels in Helena for July

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

Data source: Helena 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 Helena Compares to Other Months

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

This table compares monthly weather conditions in Helena, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	107 mm (4.2 inches)	84%	moderate
February Weather	9°C (48°F)	185 mm (7.3 inches)	83%	high
March Weather	14°C (57°F)	172 mm (6.8 inches)	81%	very high
April Weather	17°C (62°F)	146 mm (5.7 inches)	81%	very high
May Weather	23°C (73°F)	138 mm (5.5 inches)	83%	extreme
June Weather	26°C (79°F)	133 mm (5.2 inches)	83%	extreme
July Weather	28°C (82°F)	124 mm (4.9 inches)	81%	extreme
August Weather	27°C (81°F)	114 mm (4.5 inches)	74%	very high
September Weather	25°C (77°F)	92 mm (3.6 inches)	71%	very high
October Weather	19°C (66°F)	111 mm (4.4 inches)	76%	high
November Weather	11°C (52°F)	82 mm (3.2 inches)	84%	high
December Weather	9°C (49°F)	144 mm (5.7 inches)	88%	moderate