October Weather in Boise, United States

Last updated: June 24, 2025

In October, the average temperature in Boise, United States hovers around 11°C (53°F), with extreme fluctuations possible: temperatures can dip as low as -10°C (15°F) or soar to a maximum of 29°C (85°F). Expect a modest precipitation of 22 mm (0.9 in) spread over 3 days and an average humidity level of 65%, creating a varied yet typical climate for the season.

October Temperature in Boise

In October in Boise, the average temperature is 11°C (53°F), with maximums reaching up to 29°C (85°F) and minimums potentially dropping as low as -10°C (15°F). It's advisable to pack a variety of clothing to accommodate the wide temperature range during your travels.

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

The chart illustrates October temperature patterns in Boise, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boise, October typically has an average temperature of 11°C (53°F), with highs reaching up to 29°C (85°F) and lows dropping to around -10°C (15°F).

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

October Precipitation in Boise

In Boise in October, the precipitation amount is 22 mm (0.9 in) over a span of 3 days.

October Precipitation Trends in Boise

The chart displays monthly precipitation patterns in Boise, 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 Boise, October typically receives around 22 mm (0.9 inches) of precipitation spread over approximately 3 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 Boise

In Boise in October humidity is 65%. With an average temperature of 11°C (53°F), this humidity feels like a damp chill that can make outdoor activities somewhat uncomfortable, so travelers should be prepared with light layers and possibly a waterproof jacket to stay cozy while exploring.

October Average Humidity in Boise

This chart illustrates the average monthly humidity levels in Boise, 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 Boise is approximately 65%, 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 Boise

In Boise in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Boise, you can refer to this Hourly UV Index in Boise.

Maximum UV Index Levels in Boise for October

The chart shows the monthly maximum UV Index (UVI) for Boise 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 Boise typically reaches 6, which falls under the high exposure category.

Data source: Boise 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 Boise Compares to Other Months

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

This table compares monthly weather conditions in Boise, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (33°F)	49 mm (1.9 inches)	88%	moderate
February Weather	2°C (36°F)	50 mm (2.0 inches)	89%	moderate
March Weather	8°C (46°F)	38 mm (1.5 inches)	85%	high
April Weather	11°C (52°F)	36 mm (1.4 inches)	79%	very high
May Weather	16°C (61°F)	39 mm (1.5 inches)	71%	very high
June Weather	21°C (71°F)	21 mm (0.8 inches)	71%	extreme
July Weather	27°C (81°F)	1 mm (0.0 inches)	66%	extreme
August Weather	26°C (78°F)	8 mm (0.3 inches)	50%	very high
September Weather	20°C (68°F)	10 mm (0.4 inches)	48%	very high
October Weather	11°C (53°F)	22 mm (0.9 inches)	65%	high
November Weather	6°C (43°F)	32 mm (1.3 inches)	84%	moderate
December Weather	1°C (34°F)	40 mm (1.6 inches)	87%	low