Tomorrow in Boise looks
patchy rain nearby, with a high of 50°
and an overnight low of 43°.
There is a 77% chance of rain - plan accordingly.
Winds top out near 9 mph,
and the UV index reaches 1 (low).
Boise receives about 365 mm (14.4 inches) of precipitation a year and averages 10.0 hours of sunshine per day. July is the driest month in the dataset.
What dryness changes day to day
Rain and sunshine
About 365 mm (14.4 inches) falls across 77 wet days, with 10.0 hours of sunshine on an average day.
Typical day and night
Boise averages 64°F (18°C) by day and 43°F (6°C) at night across the year.
Seasonal change
July highs reach 94°F (34°C), while December lows fall to 25°F (-4°C).
Yes - about 18 days a year carry measurable snowfall, concentrated November through April.
What is the rainiest month in Boise?
December, at 2.2 inches (56 mm) over about 12 days. July is the driest month, at 2 mm (0.1 in).
What is the best time to visit Boise?
September to October and April is the sweet spot for Boise - temperatures sit either side of the peak heat rather than in it. Expect 72°F (22°C) in the afternoon and around 4 days of rain in a typical month of it. For the same question asked the other way round, see where else is warm in September.
What is the coldest month in Boise?
December, with highs of 38°F (4°C) and lows near 25°F (-4°C). The coldest day in the 2015-2024 record fell to -10°F (-23°C).
When is Boise at its hottest?
July, averaging 94°F (34°C) by day and 65°F (18°C) overnight. The hottest single day in our 2015-2024 record for this location reached 107°F (42°C).
Is Boise humid?
Relative humidity averages 52% across the year, which reads as dry. The most comfortable stretch falls in the drier half of the year.