Province guides United States of America
Climate in Idaho
Idaho has a diverse climate with differing temperatures between north and south, but overall the air is dry and clear with little humidity. Generally the south is drier and has hotter summer temperatures, while the mountainous areas experience long and very cold winters with lots of snow. The best time to visit Idaho is in the late spring (May and June) and early autumn (late August and September).
In Boise, the capital of Idaho, average high temperatures in summer climb to about 90°F (32°C), and heatwaves are common in July and August. Winter temperatures typically average between 24°F (-4°C) and 37°F (3°C).