Moving to the Inland Northwest? From the Treasure Valley to the Bitterroots, the weather across Idaho, Eastern Washington, and Western Montana can vary wildly from one city to the next. Whether you’re buying your first home or relocating for a lifestyle upgrade, here’s what you need to know about the local climate—broken down by region.
Idaho
Boise, ID
- Climate: High desert with over 200 sunny days per year.
- Seasons: Four distinct seasons. Hot, dry summers and cold but manageable winters.
- Advice: Sunscreen in summer, snow shovel in winter. Expect occasional inversions in winter that trap fog or smoke.
Coeur d’Alene, ID
- Climate: Mountain lake climate with cooler temps and more precipitation than Boise.
- Seasons: Mild spring/fall, warm summers, snowy winters.
- Advice: Be ready for heavy snowfall and slick roads. Popular for winter sports, so plan for winter tires and layered clothing.
Idaho Falls, ID
- Climate: High elevation plains—cold winters, warm dry summers.
- Seasons: Long winters with strong wind; short but hot summers.
- Advice: Windproof gear is a must. Be prepared for snowstorms and icy conditions in winter.
Twin Falls, ID
- Climate: Semi-arid, with moderate winters and hot summers.
- Seasons: Spring can be windy, summers dry and warm, winters shorter than in other parts of Idaho.
- Advice: Great for outdoor lovers year-round, but invest in sunglasses and windbreakers.
Eastern Washington
Spokane, WA
- Climate: Four-season climate with dry summers and snowy winters.
- Seasons: Summer is warm and pleasant; winter brings regular snow.
- Advice: Enjoy the clear summer skies and prepare for snow plowing in winter. Fall is especially beautiful here.
Pullman, WA
- Climate: Slightly milder and windier than Spokane due to elevation.
- Seasons: Cold winters, warm summers. Expect foggy mornings in late fall.
- Advice: Bundle up in winter and enjoy the rolling wheat fields in summer.
Walla Walla, WA
- Climate: Mild winters, hot summers, and a dry climate ideal for wine country.
- Seasons: Summer can be surprisingly hot; winter is more forgiving.
- Advice: Be fire-smart in the summer and prepared for dust or smoke on dry days.
Western Montana
Missoula, MT
- Climate: Valley climate—cool mornings, warm afternoons, moderate snow.
- Seasons: Winters can be long with occasional heavy snowfall; summers are dry and warm.
- Advice: You’ll need both snow gear and hiking boots. Keep an eye on air quality in late summer due to wildfires.
Kalispell, MT
- Climate: Northern mountain climate with cold, snowy winters and brief, pleasant summers.
- Seasons: Winter is long and snowy, spring comes late.
- Advice: Snow tires and patience. Beautiful summers are worth the wait.
Butte, MT
- Climate: One of the coldest cities in the contiguous U.S. due to its elevation.
- Seasons: Long winters and short summers.
- Advice: A heavy-duty winter coat is non-negotiable. Spring can be unpredictable—snow in May isn’t unheard of.
Final Thoughts
Snow: A Tale of Elevation
Snowfall in the Northwest depends heavily on where you live:
- Low elevations (like Boise or Spokane) get manageable snow in winter—just enough for sledding and cozy days inside.
- Mountain towns like Coeur d’Alene or Big Sky can see feet of snow and require experience with winter driving and home maintenance (think snow tires and roof rakes).
If you’re moving from a warmer climate, it may take time to adjust—but many residents come to love the snowy season.
The Power of the Shoulder Seasons
Spring and fall in the Northwest are stunning but unpredictable. You might experience a 30-degree temperature swing in one day.
- Spring: Expect rain, budding trees, and a slow warm-up. Great for gardening and hiking.
- Fall: Crisp mornings, golden leaves, and occasional early snow flurries in higher elevations.
Layered clothing is your best friend.
Wind, Wildfires, and Weather Awareness
Parts of Idaho and Montana experience high winds—especially in open plains or foothills. Summer and early fall may also bring wildfire smoke, which can affect outdoor plans and air quality. Stay tuned to local news or apps like AirNow for real-time air quality updates.
Final Tips for Newcomers
- Invest in gear: Waterproof shoes, layered clothing, and snow tires go a long way.
- Expect variety: Weather can change fast—always check the forecast before heading out.
- Ask your neighbors: Locals usually have great tips specific to your area.
Living in the Northwest means embracing variety and the outdoors in every season. With a little preparation, you’ll not only adjust—you’ll thrive.
