May Weather in Butte, United States

Last updated: June 24, 2025

In May, the average temperature in Butte, United States hovers around 7°C (45°F). While the mercury can dip as low as -10°C (14°F), it can also rise to a pleasant 24°C (75°F). Be prepared for 17 days of rain, with total precipitation reaching 89 mm (3.5 in), all set against a backdrop of 83% humidity. Stay cozy and ready for all that May has to offer!

May Temperature in Butte

In May in Butte, the average temperature is 7°C (45°F). Maximum temperatures can reach 24°C (75°F), while minimums can drop as low as -10°C (14°F). It's essential to pack appropriately for a wide range of weather conditions when traveling to Butte during this month.

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

The chart illustrates May 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, May typically has an average temperature of 7°C (45°F), with highs reaching up to 24°C (75°F) and lows dropping to around -10°C (14°F).

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

May Precipitation in Butte

In Butte in May, the total precipitation amount is 89 mm (3.5 in), occurring over the course of 17 days.

May Precipitation Trends in Butte

The chart displays monthly precipitation patterns in Butte, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Butte, May typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 17 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Butte

In Butte in May, humidity is 83%. With an average temperature of 7°C (45°F), this humidity feels like a chilly blanket wrapping around you, making travel somewhat uncomfortable as you navigate the dampness that settles in your clothes, leading to a heavy and muggy experience outdoors.

May Average Humidity in Butte

This chart illustrates the average monthly humidity levels in Butte, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Butte is approximately 83%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Butte

In Butte in May, 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 Butte.

Maximum UV Index Levels in Butte for May

The chart shows the monthly maximum UV Index (UVI) for Butte in May, 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 May, the maximum UV index in Butte typically reaches 10, which falls under the very high exposure category.

Data source: Butte May 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 May 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 May’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 May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (18°F)	22 mm (0.9 inches)	94%	moderate
February Weather	-9°C (17°F)	58 mm (2.3 inches)	93%	moderate
March Weather	-3°C (28°F)	39 mm (1.5 inches)	91%	high
April Weather	1°C (33°F)	63 mm (2.5 inches)	87%	very high
May Weather	7°C (45°F)	89 mm (3.5 inches)	83%	very high
June Weather	13°C (55°F)	94 mm (3.7 inches)	80%	extreme
July Weather	17°C (64°F)	29 mm (1.1 inches)	75%	very high
August Weather	16°C (62°F)	31 mm (1.2 inches)	66%	very high
September Weather	11°C (53°F)	38 mm (1.5 inches)	66%	very high
October Weather	2°C (37°F)	42 mm (1.7 inches)	77%	moderate
November Weather	-3°C (27°F)	34 mm (1.3 inches)	91%	moderate
December Weather	-8°C (18°F)	30 mm (1.2 inches)	96%	low