Idaho’s weather is the subject of countless jokes and memes—and for good reason! It can change in an instant, with weekly temperature swings of more than forty degrees. Some days, it feels like we experience all four seasons in just 24 hours. One minute, we’re in flip-flops; the next, we’re digging out snow boots. And of course, there’s the infamous list of Idaho’s “11 seasons,” featuring gems like “Fool’s Spring,” “Second Winter,” and of course, “Spring of Deception.” While our unpredictable weather keeps us on our toes, it also brings the benefit of diverse seasonal activities to enjoy year-round.
Whether you’re swooshing down the fresh powder on the slopes of Tamarack Resort or gearing up for an exhilarating whitewater rafting adventure in Hells Canyon, Boise and the surrounding areas in Idaho provide the perfect climate for year-round outdoor fun. Idaho’s semi-arid climate, abundant sunshine, and diverse landscapes make it an outdoor enthusiast’s paradise. Each season in Idaho offers its own unique adventures. If you’re considering relocating to Boise and the Treasure Valley, here’s what you need to know about the weather and the many activities each season offers.
Winter: A Snowy Playground
Boise experiences mild winters compared to other northern states, with an average annual snowfall of just over 19 inches. While the valley sees moderate snow, the surrounding mountains receive plenty of powder, making them perfect for winter sports.
- Average Temperatures: Upper 30s to low 40s during the day, dipping into the 20s or lower in January.
- Activities:
- Skiing & snowboarding at Bogus Basin, Tamarack, and Brundage Mountain.
- Snowshoeing and cross-country skiing.
- Snowmobiling through scenic trails in McCall and Stanley.
- Relaxing in natural hot springs like Gold Fork, Kirkham, or Trail Creek.
Spring: A Season of Renewal
As the snow melts, Idaho bursts into life with blooming wildflowers, rushing rivers, and mild temperatures, making it an ideal time for outdoor adventures.
- Activities:
- Hiking in the Boise Foothills, Table Rock, and the Sawtooth Mountains.
- Whitewater rafting on the Payette, Salmon, and Snake Rivers.
- Fishing for trout and steelhead in Idaho’s lakes and rivers.
- Biking the Boise Greenbelt and Ridge to Rivers trail system.
Summer: Long Days of Sunshine and Adventure
Idaho summers are warm and dry, with temperatures frequently in the 90s but cooling off in the evenings. The season is perfect for enjoying Idaho’s many lakes, rivers, and trails.
- Hottest Months: Mid-June through mid-September.
- Activities:
- Boating, paddleboarding, and swimming at Lucky Peak Reservoir, Redfish Lake, or Payette Lake.
- Floating the Boise River.
- Mountain biking and hiking in Sun Valley and Hells Canyon.
- Outdoor concerts, rodeos, and festivals.
- Riding the mountain coaster at Bogus Basin.
Fall: Golden Landscapes and Crisp Adventures
Autumn in Idaho is a breathtaking display of vibrant colors and cooler temperatures, making it a favorite season for outdoor enthusiasts.
- Activities:
- Scenic drives through the Sawtooth Scenic Byway and Teton Valley.
- Hunting season for deer, elk, and waterfowl.
- Hiking and mountain biking with stunning fall foliage.
- Visiting pumpkin patches, apple orchards, and harvest festivals.
Why Idaho’s Climate is Perfect for Outdoor Living
With over 210 days of sunshine a year and distinct but manageable seasons, Idaho provides the perfect backdrop for year-round adventure. The state’s distinct four seasons only enhance the experiences available. Whether it’s the crisp autumn air, the snowy winter wonderland, the vibrant spring blooms, or the sun-drenched summer days, Idahoans take full advantage of what each season offers. Idaho’s weather shapes recreation throughout the year. No matter the season, Idaho’s weather ensures that there’s always something exciting to do in Boise and the Treasure Valley.
