Plant By Frost

Montana

Frost dates for Nye #2, MT

At this NOAA station the last spring frost (32°F) usually comes by June 1 and the first fall frost around September 11, giving a growing season of about 100 days.

June 1average last spring frost
September 11average first fall frost
JanAprJulOctDec

Frost odds

1 year in 10 the last spring frost is later thanJune 21
Half of years the last spring frost is later thanJune 1
9 years in 10 the last spring frost is later thanMay 15
1 year in 10 the first fall frost is earlier thanAugust 25
Half of years the first fall frost is earlier thanSeptember 11
9 years in 10 the first fall frost is earlier thanSeptember 26

A hard freeze (28°F) usually ends by May 15 and returns around September 25.

Station USC00246190, elevation 1475 m. Based on 27 years of 1991 to 2020 records. A garden higher up, in a hollow or far from this station can freeze later in spring.

Check another ZIP

Sources

  1. U.S. Annual/Seasonal Climate Normals, 1991 to 2020 (freeze probability dates by station), NOAA National Centers for Environmental Information, checked 1 November 2026
  2. Annual/Seasonal Normals 1991 to 2020 documentation, NOAA National Centers for Environmental Information, checked 1 November 2026
  3. 2024 Gazetteer Files, ZIP Code Tabulation Areas, US Census Bureau, checked 1 November 2026