Weather in Boise City
Summers are hot and dry with cool nights, while winters are
generally cold with snow on the surrounding mountains. There is
very little annual precipitation in the city. Summer temperatures
average 90Â°F (32Â°C), but hotter spells are common in July and
August. Winter temperatures are typically 30-50Â°F (-1Â°C to 10Â°C)
during the day and below freezing at night.