Idaho – Headlights streak across wet pavement in Boise this morning as steady rain settles in and clouds hang low over the valley. It feels mild for December, but changing conditions through the day could complicate travel, especially for anyone heading out early or planning weekend trips.
According to the National Weather Service in Boise, rain continues through the day with a 100 percent chance of precipitation and totals between one-tenth and one-quarter inch. Southeast winds turn breezy at times, and temperatures peak near the low 50s. Roads along I-84, city arterials, and neighborhood streets stay slick through the afternoon.
Conditions begin to shift later tonight as colder air works in. Rain tapers, and temperatures fall toward the upper 20s. While little snow accumulation is expected, any lingering moisture could refreeze by early Saturday, raising patchy black ice concerns on bridges and shaded roadways.
Saturday brings a brief break with sunshine and highs near the mid-40s. That calm window closes quickly. Rain chances return Saturday night and increase Sunday, with another round of wet roads likely through the day. Sunday’s highs approach the upper 40s, but colder nighttime temperatures keep freeze potential in play.
Meteorologists are watching a subtle winter signal as Christmas travel approaches. While Boise stays mostly rain-focused for now, models hint at a possible rain-to-snow changeover late next week if colder air arrives. Confidence remains low, but travelers should stay alert as patterns evolve.
Now is the time to plan ahead. Allow extra drive time during rain, slow down on slick pavement, and watch for refreeze during colder mornings. Keep winter gear in vehicles, even if snow stays limited.
More updates are expected as Christmas week nears. Traveling soon or seeing slick spots where you live? Share what conditions look like around Boise.
Five-Day Outlook for Boise, Idaho:
Saturday: Mostly sunny, high near 44
Sunday: Rain, high near 48
Monday: Rain likely, high near 51
Tuesday: Chance of rain, high near 52
Wednesday: Chance of rain, high near 53
