October Weather in Butte, United States

Last updated: June 24, 2025

In Butte, United States, the average temperature in October hovers around 2°C (37°F), with extremes ranging from a chilling -29°C (-20°F) to a warm 23°C (74°F). Expect 42 mm (1.7 in) of precipitation spread over approximately 10 days, and be prepared for an average humidity level of 77% that adds to the overall atmosphere of the season.

October Temperature in Butte

In October in Butte, the average temperature is 2°C (37°F). Maximum temperatures can reach 23°C (74°F), while minimums can drop as low as -29°C (-20°F). Travelers should be prepared for a wide range of temperatures, from chilly conditions to warmer days, making it essential to pack accordingly for their visit.

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

The chart illustrates October 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, October typically has an average temperature of 2°C (37°F), with highs reaching up to 23°C (74°F) and lows dropping to around -29°C (-20°F).

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

October Precipitation in Butte

In Butte in October, the precipitation amount is 42 mm (1.7 in) over the course of 10 days.

October Precipitation Trends in Butte

The chart displays monthly precipitation patterns in Butte, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Butte, October typically receives around 42 mm (1.7 inches) of precipitation spread over approximately 10 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Butte

In Butte in October humidity is 77%. With an average temperature of 2°C (37°F), this humidity feels like a cold, damp chill that penetrates your clothes, making travel uncomfortable and brisk.

October Average Humidity in Butte

This chart illustrates the average monthly humidity levels in Butte, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Butte is approximately 77%, offering insight into how humid the weather typically is during this month.

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

October UV Index in Butte

In Butte in October, 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 October

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

Data source: Butte October 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 October 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 October’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 October’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