Idaho – Calm skies over Boise this morning will give way to a damp, foggy stretch as early December weather begins to turn unsettled. Drivers on I-84 and local roadways should expect visibility to drop quickly as fog thickens late Thursday, followed by light rain through Friday.
According to the National Weather Service in Boise, a 30% chance of rain develops Thursday afternoon, increasing to 70–90% by Friday morning. Patchy fog may form ahead of the rain and linger into the early commute, especially in low-lying areas like the Boise River Valley and rural Ada County. Motorists should slow down, use low beams, and keep extra distance in traffic as pavement becomes slick and visibility drops below a quarter mile at times.
Temperatures remain above freezing through the weekend, sparing the region from ice concerns for now. Still, forecasters warn of potential flash freezing early next week as colder air filters back in behind the system. That could create slick morning conditions if rain refreezes before sunrise Monday.
By Sunday, drier air returns with highs near 50°F before a second system brings another chance of light rain Monday night into Tuesday, signaling a steady start to December’s transitional weather.
Five-Day Outlook (Boise, ID):
- Today: Sunny after patchy fog, high 41°F.
- Thursday: 30% chance of rain, high 42°F.
- Friday: Rain likely, high 45°F.
- Saturday: 70% chance of rain, high 49°F.
- Sunday: Partly sunny, high 50°F.
