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Boise, ID

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NWS Forecast Office Boise, ID

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Last Map Update: Fri, Oct 23, 2026 at 3:02:22 am MDT

Fri: Windy, Colder, with Rain & Mtn Snow
Frost and Fog this Weekend
Halloween Weather Stats
Friday will become windy and much colder in the wake of a strong cold front. Widespread rain and high mountain snow will continue through mid-day, before tapering off from west to east in the afternoon and evening.
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Cold overnight temperatures will allow frost to develop across the southeast Oregon and southwest Idaho valleys this weekend. Some sheltered valleys may also see morning fog/freezing fog.
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This graphic shows the historical climate statistics for Halloween for sites across southeast Oregon and southwest Idaho.
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