Boise, Idaho has a semi-arid climate, with warm summers and relatively mild winters. The city typically sees around 91 days of sunshine each year, making it one of the sunniest cities in the US. The average high temperature in summer is 86°F (30°C) and the average low is 51°F (11°C). Winters are generally cool and dry, with an average high of 45°F (7°C) and an average low of 24°F (-4°C). Snowfall is quite rare in Boise, usually occurring just once or twice a year.
Boise, Idaho gets 13 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Boise averages 18 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 206 sunny days per year in Boise. The US average is 205 sunny days.
Boise gets some kind of precipitation, on average, 87 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Summer High: the July high is around 92 degrees
Winter Low: the January low is 24
Rain: averages 13 inches of rain a year
Snow: averages 18 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Boise is 7.3 (10=best), which means it is one of the most pleasant places in Idaho.
8.5 / 5.1
Summer / Winter
September, June and May are the most pleasant months in Boise, while December and January are the least comfortable months.