Best Time to Visit Boise, Idaho, USA
Boise is at its sunniest and driest in May–September.
The best time to visit Boise for sunny, dry weather is May–September — 5 months of the year fit our sunny profiles at this specific location. The drier stretch runs through February and May–October; the wetter half falls in March–April and November–January. At the city itself, monthly average temperatures range from -0.8°C / 30.6°F in January to 23°C / 73.4°F in July, with rainfall from 8 mm / 0.3 in (August) to 40 mm / 1.6 in (January). These are point-value climate normals sampled at Boise, Idaho, United States of America's coordinates — usually more actionable for travellers than the country-wide average. Boise's climate is broadly seasonal. The full month-by-month table below lets you match your travel window against our five weather profiles.
Recommended months
| Month | Temp | Rain | Feels like |
|---|---|---|---|
| May | 14.4°C57.9°F | 31 mm1.2″ | Sunny & Mild |
| June | 19°C66.2°F | 21 mm0.8″ | Sunny & Mild |
| July | 23°C73.4°F | 9 mm0.4″ | Sunny & Warm |
| August | 22.9°C73.2°F | 8 mm0.3″ | Sunny & Warm |
| September | 17.4°C63.3°F | 19 mm0.7″ | Sunny & Mild |
Frequently asked questions
When is the best time to visit Boise?
The best time to visit Boise for sunny, dry weather is May, June, July, August, September. At the city itself, the warmest month is July averaging 23°C / 73.4°F, and the driest is August with about 8 mm / 0.3 in of rain. These are point-value climate normals sampled at Boise's coordinates.
When is the rainy season in Boise?
The rainy season at Boise, Idaho runs through March–April and November–January, when monthly rainfall exceeds the annual median of about 31 mm / 1.2 in. The wettest single month is January (40 mm / 1.6 in).
What is the driest month in Boise?
The driest month in Boise is August, averaging about 8 mm / 0.3 in of rainfall. Temperature that month averages 22.9°C / 73.2°F.
What months should I avoid visiting Boise?
The least comfortable months for travel to Boise — based on point-value climate at the city — are January, February, November, December. These are the wettest or coolest months at this location. Rainfall peaks at 40 mm / 1.6 in in January, and the coldest month averages -0.8°C / 30.6°F.
Is Boise climate different from United States of America overall?
Yes, usually. Our Boise figures are point-value climate normals sampled at the city itself, while our United States of America figures are area-weighted averages across the whole country. The two can diverge substantially in geographically diverse or elevation-varied countries. The month-by-month table below reflects Boise specifically — usually the more actionable data for a traveller planning to spend time in the city.