BOISE, Idaho – NOAA’s Winter 2025–2026 outlook, released Thursday, Oct. 16, points to a snowy, colder-than-normal season across Idaho, with steady mountain snow and periodic valley cold snaps through early March. The Climate Prediction Center’s guidance shows above-normal precipitation and below-normal temperatures across the northern Rockies — a setup often tied to La Niña winters.
According to the National Weather Service in Boise, “Idaho is in line for an active winter with frequent Pacific systems and deep mountain snowpack.” Western and central ranges — including the Sawtooths, Bitterroots, and Central Idaho Mountains — are expected to see near-continuous snow through February. Valley locations such as Boise, Twin Falls, and Pocatello may see alternating rounds of snow, freezing rain, and fog as cold air pools in the basins.
Forecasters note that January and February will likely bring the highest storm frequency, with several systems capable of producing significant snowfall in higher passes along I-84 and U.S. 95. Avalanche danger may rise sharply in backcountry terrain after midseason storms.
NOAA adds that colder-than-average temperatures could persist into March, delaying snowmelt and extending winter travel hazards. The long-duration cold may also stress livestock and energy demand statewide.
For Idaho, Winter 2026 looks to bring steady snow and sustained chill — a traditional mountain winter demanding preparation for icy roads, power interruptions, and long stretches of frigid air.
