​​Planning on taking an Idaho vacation and not sure what to pack? Or maybe you’re making a move to a new state and looking for the perfect city to settle in without worrying about unpredictable weather. Weather in Idaho can reach extreme temperatures, but never fear, there are more than a few cities that offer reasonable climates year-round.

In general, Boise has some of the best weather in Idaho, with averages in the 70s throughout the summer and in the 20s during the winter. However, there are many other cities in Idaho that provide an enjoyable environmental experience, depending on your criteria.

Whether you’re looking to move or take a vacation, read more to learn about the different weather conditions present in Boise and beyond.

What Is the Weather in Boise?

Boise is Idaho’s capital city, as well as its largest, boasting a population of 226,115. While opportunities are always a draw in a large metropolitan area, it’s easy to see why so many people want to live there.

The weather in Boise is generally temperate, with a high of 91 degrees in the summer and a low of 23 degrees in the winter. The climate is dry and precipitation is lower than the national average.

Ready to take a trip? Read more to discover the weather in each part of the year.

What is the Temperature in Boise?

Boise is the best place if you want to experience the full breadth of all the seasons, without temperatures getting too extreme.

  • Summer – July is the warmest month in Boise. Temperatures can climb to an average of 91 degrees F and reach lows of 53 degrees in June.
  • FallTemperatures start falling significantly during September, with a high of 81 degrees in September and a low of 30 degrees in November.
  • Winter – January is the coldest month in Boise. At night, temperatures can drop to as low as 23 degrees F.
  • Spring – In March, temperatures start to reach a high of 54 degrees F, and keep climbing through May, when they can reach as high as 72 degrees F. Lows are in the 30s and 40s overnight.

Is Boise Humid?

The weather in Boise is dry year-round, which can make hotter temperatures in the summer more tolerable. The average humidity is 77% in December and only 33% in August.  No need to worry about excessive sweating in the summer months, though you may need to buy a humidifier to get you through the dry winters. We recommend LEVOIT’s Ultrasonic humidifier to humidify your full room.

How Much Does It Snow and Rain In Boise?

You might be expecting snowfall in the winter, but the dry climate in Boise keeps precipitation to a minimum compared to the national average.

Snowfall reaches an average of 18 inches a year, below the national average of 28 inches. The first snowfall typically occurs during November and snowy days begin to taper off in March.

This extends to other forms of precipitation, namely rain.

You won’t have your outdoor activities rained out too often. In Boise rainfall averages 13 inches a year. In comparison, the national average is 38 inches.

Is it Sunny in Boise?

Boise experiences an average of 206 sunny days a year, which is on par with the US average of 205. This is ideal for those who experience symptoms of seasonal affective disorder, which can cause depression in darker, cloudier conditions.

What is There to Do in Boise?

Now that you have a grasp on the weather, you’ll have to plan a way to enjoy it. There are many different activities in Boise that take advantage of the outdoor space. The following outdoor attractions are popular in both winter and summer.

  • Bogus Basin
  • Boise River Greenbelt
  • Idaho Botanical Gardens
  • Lucky Peak State Park
  • Table Rock
  • Roaring Spring Water Park

Whether you want to grab a bike and travel down the Boise River Greenbelt, or hike to the top of Table Rock, the weather in Boise will provide a sunny backdrop to your outdoor adventures.

On the rare occasion that it does rain, you can always pop into the Boise Art Museum for a peek at the exhibitions currently on display or take a trip back in time and appreciate the history of Boise at the Idaho State Museum.


With so many great choices, it is difficult to pick just one city with the best weather, but there is something for everyone in Boise. Whether you are looking for a warm summer destination in less humid conditions or a snow-filled vacation in the winter, Boise is a wonderful place to visit year-round.