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Idaho

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Idaho Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Idaho year round climate

  • Spring (March–May): Avg. -0.4°C–10.1°C, cold climate, occasional snowfall, March has the most rainfall. Common activities: Skiing (before March), viewing spring scenery (May). Suggested clothing: Warm coat, hat, gloves, scarf.
  • Summer (June–August): Avg. 15.4°C–21.4°C, mild and dry climate, little rainfall. Common activities: Hiking, camping, fishing. Suggested clothing: Light and breathable clothing, sun hat.
  • Autumn (September–November): Avg. 8.8°C–14.9°C, cool climate, rainfall gradually increases. Common activities: Viewing autumn leaves, hiking. Suggested clothing: Light jacket, long-sleeved shirt, comfortable shoes.
  • Winter (December–February): Avg. -5.8°C–-0.4°C, cold climate, frequent snowfall. Common activities: Skiing, snow activities. Suggested clothing: Heavy warm coat, snow pants, waterproof boots, hat, gloves, scarf.

Idaho climatological average

Annual average temperature: approx. 6°C / Annual rainfall: approx. 444 mm / Summer humidity: 30%–40% / Rainiest month: March

Idaho monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
-5.8°C
36.6
February
-4.3°C
42.4
March
-0.4°C
53.2
April
4.7°C
41.6
May
10.1°C
52.7
June
15.4°C
22.9
July
21.4°C
1.5
August
20°C
47.4
September
14.9°C
27.6
October
8.8°C
23
November
-0.8°C
44
December
-3°C
51.5

Idaho weather for the next seven days

12/15
Monday
Partly Cloudy
3.3°C/-1.9°C
12/16
Tuesday
Overcast
2.9°C/0.7°C
12/17
Wednesday
Moderate snow
1.7°C/-9.3°C
12/18
Thursday
Heavy snow
-2.2°C/-8.9°C
12/19
Friday
Heavy snow
-0.3°C/-1.4°C
12/20
Saturday
Partly Cloudy
-6.5°C/-16.1°C
12/21
Sunday
Sunny
-2.5°C/-17.7°C

Idaho Frequently Asked Questions and Useful Information for Travel

What are the best months to visit Idaho?

The ideal time to visit Idaho depends on your interests. For warm weather and outdoor activities like hiking and water sports, June through September is generally excellent. September and October offer beautiful fall foliage and fewer crowds, perfect for scenic drives and hot springs. Winter, from December to February, is best for skiing and other snow sports. Spring brings wildflowers and pleasant, though sometimes unpredictable, weather, offering opportunities for outdoor exploration.

What is the prettiest part of Idaho?

The Teton Scenic Byway, stretching 69 miles through Idaho's Teton Valley, is considered one of the most beautiful routes. It provides stunning views of the Teton Mountain Range, rolling farmland, and charming small towns, while also granting access to numerous outdoor adventures.

Is Idaho worth visiting?

Absolutely. Idaho is highly recommended for nature lovers and outdoor enthusiasts, boasting breathtaking mountain scenery, crystal-clear lakes, and abundant opportunities for hiking, skiing, and camping. The state also offers a rich history, quaint small towns, and unique attractions such as the City of Rocks and Shoshone Falls. For those seeking a rugged and diverse exploration, Idaho is a worthwhile destination.

What is considered the number one tourist attraction in Idaho?

While Idaho has many popular attractions, Shoshone Falls, often called the "Niagara of the West," is a widely recognized and spectacular natural wonder. Other top attractions include Coeur d'Alene Lake, the Old Idaho Penitentiary, Silverwood Theme Park, and Craters of the Moon National Monument.

What kind of outdoor activities can I do in Idaho?

Idaho is an outdoor adventurer's paradise. You can enjoy hiking and camping in its vast wilderness areas, go whitewater rafting or kayaking on its many rivers, swim and boat on pristine lakes, or ski and snowboard in its mountain resorts during winter. The state also offers excellent opportunities for fishing, cycling, and exploring scenic byways.