A cold upper-level low pressure system over the Nevada-Idaho border continued to push in moist, chilly air into the Treasure Valley through the weekend, but snow is not in the forecast ... yet. Boise temperatures have dropped 20 degrees in the past 48 hours and overnight lows for the coming week will be in the 40s, with cloudy, wet days filling the long-term forecast.
And with that in mind, the Idaho Transportation Department reminds us
that drivers will be able to use studded tires beginning this Wednesday, Oct. 1. The studded tire season runs through April 30. Montana and Nevada share the same dates, but in Oregon and Washington, studded tires aren't permitted until Nov. 1.
According to the National Weather Service office, the average "freeze date" (when temperatures hit 32 degrees) for Boise is Oct. 10. The average "hard freeze date" (when temperatures reach or fall below 28 degrees) is Oct. 23. And the average date for Boise when temperatures reach or fall below 24 degrees is Nov. 6.