Idaho local data guide

Average Snowfall in Boise by Month

Boise receives an average annual snowfall of approximately 17.6 inches based on 1991–2020 climate normals recorded at the Boise Airport. Snowfall is concentrated in the winter months, with December and January typically experiencing the highest accumulations.

Updated with grounded research as of 2026-09-15.

The short answer

Boise experiences a modest amount of snowfall annually, averaging 17.6 inches per year. Most of this accumulation occurs during the winter months of December and January, though light snow can occasionally occur from October through April. Residents should be prepared for winter driving conditions during these peak months, though heavy, long-lasting snow cover is less common in the city compared to surrounding mountain regions.

Key facts

Average Annual Snowfall
17.6 inches (1991–2020 climate normals)
Peak Snowfall Months
December (5.6 inches) and January (5.3 inches)

Monthly Snowfall Breakdown

The following data represents the 30-year climate normals (1991–2020) as recorded by the National Weather Service at the Boise Airport (Gowen Field). These figures represent typical accumulations and help establish baseline expectations for local winter planning.

  • January: 5.3 inches
  • February: 3.3 inches
  • March: 1.2 inches
  • April: 0.1 inches
  • October: 0.1 inches
  • November: 2.0 inches
  • December: 5.6 inches

Geography and Microclimates

It is important to note that snowfall measurements are taken at the Boise Airport, which is located in the high desert of the Treasure Valley. Because topography significantly influences weather patterns in Idaho, snowfall can vary greatly within the city limits and the surrounding Treasure Valley.

As you move closer to the foothills or into higher elevations surrounding Boise, snowfall totals generally increase. Conversely, lower-elevation areas within the valley may experience less accumulation and faster melting periods than what is officially recorded at the airport.

Winter Preparedness for Residents

While Boise’s total annual snowfall is relatively low, the city does experience periods of freezing temperatures and icy conditions. Homeowners and prospective residents should ensure their properties are equipped for winter maintenance, such as snow removal for driveways and sidewalks.

Drivers should remain alert during the months of December and January, as these months present the highest probability of snow and ice on local roadways.

Common questions

Is snowfall in Boise consistent every year?

No. The 17.6-inch figure is a 30-year average (1991–2020). Boise experiences significant year-to-year variability; some winters may see very little snow, while others may produce higher-than-average accumulations.

Does it snow in Boise during the spring?

It is rare, but possible. April records an average of only 0.1 inches of snow, meaning while late-season flurries can occur, they are typically brief and do not result in significant accumulation.

How does elevation affect snowfall in the Treasure Valley?

Elevation plays a major role in Idaho weather. Areas at higher elevations, such as the Boise foothills or cities closer to the mountains, typically receive more snowfall and colder temperatures than the lower-lying areas around the Boise Airport.

Related Idaho questions

  • What is the average temperature in Boise by month?
  • How much does annual snowfall vary year-to-year in Boise?
  • What are the typical winter driving conditions in the Treasure Valley?

Sources and verification