A steady, cool rain moves across the Treasure Valley this morning, draping Boise in gray skies and glistening pavement. Commuters will need extra time through midday as bands of light to moderate rain continue under calm east winds. Visibility may dip during heavier bursts, with slick roads and standing water in low-lying areas.
According to the National Weather Service in Boise, rain remains likely through Tuesday evening with temperatures holding near 54°F. Rainfall totals could reach a quarter inch, though mountain foothills may see slightly higher amounts before showers taper late tonight.
The midweek pattern will shift quickly. By Wednesday, clouds begin to break, bringing a brief taste of sunshine and a mild high near 60°F — an unseasonably warm note for early December. However, forecasters caution that wet ground followed by clear skies could trigger early morning patchy fog and frost later in the week.
By Thursday and Friday, mostly sunny skies return, keeping highs in the upper 50s and lows near the upper 30s. It’s a welcome break before colder air pushes inland from the northwest early next week. Long-range models suggest a gradual cool-down by Sunday into Monday, with daytime highs slipping back toward the lower 50s — typical of a December transition.
Five-Day Outlook (Boise, ID)
• Tuesday: Rain likely, high 54°F.
• Tuesday Night: 40% chance of rain, low 49°F.
• Wednesday: Decreasing clouds, high 60°F.
• Thursday: Mostly sunny, high 59°F.
• Friday: Partly cloudy, high 58°F; low 36°F.
• Saturday: Mostly sunny, high 56°F.
