July Weather in Helena, United States

Last updated: June 24, 2025

In July, the average temperature in Helena, United States hovers around 19°C (67°F). Expect a minimum of 2°C (36°F) and a maximum of 34°C (94°F) during the month. With an average humidity of 77%, conditions can feel quite humid, making those 31 mm (1.2 in) of precipitation over 8 days a refreshing relief!

July Temperature in Helena

In July in Helena, the average temperature is 19°C (67°F). The maximum can reach 34°C (94°F), and the minimum can be as low as 2°C (36°F). This weather makes Helena a great destination for both warm and cooler outdoor activities, so be sure to pack a variety of clothing options for your trip!

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 19°C (67°F), with highs reaching up to 34°C (94°F) and lows dropping to around 2°C (36°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 31 mm (1.2 in) over the course of 8 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 31 mm (1.2 inches) of precipitation spread over approximately 8 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 77%. With an average temperature of 19°C (67°F), this humidity feels like a warm embrace, making travel slightly more challenging as the air clings to your skin, turning every step into a leisurely stroll through a sauna.

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 77%, 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 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, 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 10, which falls under the very high 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 (20°F)	23 mm (0.9 inches)	87%	moderate
February Weather	-9°C (16°F)	51 mm (2.0 inches)	88%	moderate
March Weather	-2°C (29°F)	38 mm (1.5 inches)	83%	high
April Weather	2°C (36°F)	67 mm (2.7 inches)	78%	very high
May Weather	9°C (48°F)	88 mm (3.5 inches)	76%	very high
June Weather	14°C (58°F)	107 mm (4.2 inches)	78%	extreme
July Weather	19°C (67°F)	31 mm (1.2 inches)	77%	very high
August Weather	18°C (65°F)	34 mm (1.3 inches)	71%	very high
September Weather	13°C (55°F)	44 mm (1.7 inches)	68%	very high
October Weather	4°C (40°F)	41 mm (1.6 inches)	72%	moderate
November Weather	-1°C (30°F)	33 mm (1.3 inches)	84%	moderate
December Weather	-6°C (21°F)	33 mm (1.3 inches)	90%	low