August Weather in Butte, United States

Last updated: June 24, 2025

In August, the average temperature in Butte, United States hovers around 12°C (53°F). Expect it to be quite variable, with minimums dipping to 1°C (34°F) and highs reaching up to 23°C (74°F). Be prepared for some rain, as precipitation averages 137 mm (5.4 in) over the course of 18 days. With an average humidity level of 100%, it's safe to say this month will feel quite damp!

August Temperature in Butte

In August in Butte, the average temperature is 12°C (53°F). The maximum can reach 23°C (74°F), and the minimum can be as low as 1°C (34°F). It's a great time to visit for those who enjoy mild weather but should be prepared for cooler evenings.

August Weather in Butte: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Butte, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Butte, August typically has an average temperature of 12°C (53°F), with highs reaching up to 23°C (74°F) and lows dropping to around 1°C (34°F).

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

August Precipitation in Butte

In Butte in August, the total precipitation amount is 137 mm (5.4 in) over the course of 18 days.

August Precipitation Trends in Butte

The chart displays monthly precipitation patterns in Butte, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Butte, August typically receives around 137 mm (5.4 inches) of precipitation spread over approximately 18 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Butte

In Butte in August, humidity is 100%. With an average temperature of 12°C (53°F), this humidity feels like a heavy blanket enveloping you, making travel uncomfortable and sticky, as even the slightest movement causes you to feel damp and weary.

August Average Humidity in Butte

This chart illustrates the average monthly humidity levels in Butte, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Butte is approximately 100%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Butte

In Butte in August, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Butte.

Maximum UV Index Levels in Butte for August

The chart shows the monthly maximum UV Index (UVI) for Butte in August, 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 August, the maximum UV index in Butte typically reaches 5, which falls under the moderate exposure category.

Data source: Butte August 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 August Weather in Butte Compares to Other Months

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

This table compares monthly weather conditions in Butte, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-12°C (11°F)	80 mm (3.1 inches)	94%	low
February Weather	-10°C (15°F)	74 mm (2.9 inches)	93%	low
March Weather	-7°C (20°F)	72 mm (2.8 inches)	91%	moderate
April Weather	0°C (33°F)	54 mm (2.1 inches)	85%	moderate
May Weather	5°C (42°F)	75 mm (2.9 inches)	88%	high
June Weather	11°C (51°F)	83 mm (3.3 inches)	95%	high
July Weather	13°C (56°F)	89 mm (3.5 inches)	102%	high
August Weather	12°C (53°F)	137 mm (5.4 inches)	100%	moderate
September Weather	7°C (45°F)	127 mm (5.0 inches)	96%	moderate
October Weather	1°C (33°F)	173 mm (6.8 inches)	91%	low
November Weather	-9°C (17°F)	114 mm (4.5 inches)	95%	low
December Weather	-8°C (17°F)	142 mm (5.6 inches)	96%	low