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Frost dates in Judith Basin County, Montana

Autumn-colored mountain valley under cloudy peaks in Glacier National Park, Montana
Photo: TerryDOtt, CC BY 2.0, via Wikimedia Commons

The average last spring frost in Judith Basin County falls May 22 to Jun 15 and the average first fall frost Sep 4 to Sep 23, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 4b. Places: Geyser, Moccasin, Raynesford, Sapphire Ridge, Stanford. Pick a ZIP for 10% and 90% odds, soil temperature and the 7-day freeze forecast.

ZIPPlaceLast spring frostFirst fall frostZone
59418Jun 1Sep 154b
59447GeyserMay 22Sep 234b
59452Sapphire RidgeJun 15Sep 44b
59462MoccasinMay 28Sep 204b
59469RaynesfordMay 22Sep 234b
59479StanfordMay 25Sep 214b

Nearby counties

Fergus County Wheatland County Meagher County Chouteau County Cascade County Golden Valley County

All Montana counties · Download Montana frost dates (CSV)