Dense fog in the Snake River plain and in the upper highlands of the Snake River will suppress temperatures, with highs from the upper twenties to middle thirties. Elsewhere, abundant sunshine will push temperatures into the forties, maybe even the low fifties in a few locations. The overnight lows will be warmer under the cloudy and foggy skies of the Snake River plain and upper Snake highlands with temperatures in the teens and twenties. Where it stays a clear night, temperatures will range from around 8 below zero to the teens.
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