what's the weather in boise
(Boise, Idaho - ID, USA) 1  Standing on the southern side of Idaho, the climate in Boise is fairly continental and moderate, with less severe winter weather than more northerly areas. Boise offers dry, fine weather for much of the year, with over 230 sunny days annually and a climate composed of four distinct seasons. Summer weather in Boise, from June to August, can be hot, with average daytime temperatures peaking at around 32Â°C / 90Â°F during the month of June.