Idaho is one of several regions in the United States of America, with temperatures that range from 3°C (37°F) in January to 34°C (93°F) during the peak of July. We've based our full climate overview on data from Boise, the region's most prominent city. For more detailed climate information about other cities in the area, please see the section beneath the map further down the page.
In Idaho, during the months of May and September you can expect comfortable weather, with average temperatures ranging from 22°C (72°F) to 27°C (81°F).
The peak heat season generally takes place in July and August. The cooler season is during the months of January, February, November and December.
When it comes to rainfall, Idaho experiences moderate variations in precipitation across the seasons. You can expect around 49 mm (1.9 in) of rain in December, dropping to 8 mm (0.3 in) in August. The driest conditions can be found during July, August and September, with rainfall staying below 13 mm (0.5 in).
For those seeking sunshine, July usually has the brightest skies, making it an excellent time for exploring the region.
