Boise, Idaho – The warmest stretch of above-normal temperatures in the country is expected to center on the Intermountain West during the first full week of February, with Idaho leading a pronounced warm-up that will feel more like early spring than midwinter.
According to the National Weather Service and NOAA’s Climate Prediction Center, temperatures from Tuesday through the following Monday are favored to run well above normal across Idaho, Nevada, and Utah. In southern Idaho, including Boise, Twin Falls, and the Treasure Valley, daytime highs are expected to climb into the upper 40s and 50s, running 10 to 20 degrees above typical early February levels. Overnight lows will remain mostly above freezing in lower elevations.
This warm pattern extends south into Nevada and east into Utah, where Salt Lake City, Ogden, Reno, and Elko are also expected to see unseasonably mild afternoons. Snowpack levels in the valleys are unlikely to change much during this period, as precipitation chances remain limited and temperatures stay too warm for widespread snow outside of higher terrain.
Mountain areas will still see winter conditions, but snow levels are expected to remain elevated, reducing the risk of significant travel disruptions on major routes such as I-84, I-80, and I-15. Drivers in higher passes should still remain alert for overnight refreezing.
Residents may notice melting snow, softer ground, and increased runoff during the afternoons. While winter is far from over, this pattern represents one of the strongest warm signals so far this season. Additional outlooks may follow if the ridge weakens or shifts later in the month.
