Boise Weather, When to Go and Climate Information

(Boise, Idaho - ID, USA)

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 32°C / 90°F during the month of June. Little rain falls in the Boise summer and the air is fairly dry. Nights are particularly mild and pleasant, with average summer nighttime temperatures of around 13°C / 55°F.

Fall in Boise is a popular time of year to visit, with September being noticeably warmer than October and November. Winters can be fairly short, arriving quickly. Known for its snowy winter weather, snowfalls in Boise are heaviest during December and January, with occasional flurries as late as March and possibly even April. Several ski slopes are within easy reach of Boise at the nearby Bogus Basin Resort, which features scenic cross-country skiing and is a popular trip from Boise, standing just 16 miles / 26 km from the city.

The weather and climate in Boise soon starts to improve and spring approaches, with high temperatures in May of up to 22°C / 72°F. As the trees begin to leaf out and spring flowers arrive, many people choose to visit Boise at this time, when the weather is fine and the city is less busy than during the summer months.

The average annual rainfall / precipitation in Boise in around 2.5 cm / 12 inches and the average annual snowfall is 51 cm / 20 inches.

Boise Weather and Climate Chart (Averages)

The following are the normal daily temperature ranges for Boise:



3°C / 37°F
-6°C / 21°F


7°C / 45°F
-2°C / 28°F


12°C / 54°F
0°C / 32°F


16°C / 61°F
3°C / 37°F


22°C / 72°F
7°C / 45°F


27°C / 81°F
11°C / 52°F


32°C / 90°F
15°C / 59°F


31°C / 88°F
14°C / 57°F


25°C / 77°F
9°C / 48°F


18°C / 64°F
4°C / 39°F


9°C / 48°F
0°C / 32°F


3°C / 37°F
-5°C / 23°F

Boise Weather Charts - further Boise climate statistics and charts.