When is the last frost in Cooke City, MT?

Frost is possible in any month at the nearest NOAA station (Cooke City 2 W, MT), so there is no reliable average last frost date.

When is the first frost in Cooke City, MT?

Frost is possible in any month at the nearest NOAA station.

Are these frost dates a forecast?

No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.

Frost dates for 59020Cooke City, MT

Frost is possible in any month near Cooke City, based on NOAA 1991-2020 records for the Cooke City 2 W, MT station.

Frost is possible in any month. Even summer nights can drop to freezing at this station, so protect tender plants whenever cold nights are forecast.

Frost risk by date

NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.

Spring dates: chance of a frost AFTER the date. Fall dates: chance of a frost BEFORE the date.
Temperature	Last spring: 90% / 50% / 10% chance	First fall: 10% / 50% / 90% chance	Growing season (50%)	Years with at least one
Light frost (36°F)	—	—	15 days	100%
Frost / freeze (32°F)	—	—	36 days	100%
Hard freeze (28°F)	Jun 1 · Jun 18 · Jul 6	Aug 17 · Sep 4 · Sep 17	75 days	100%

Where these dates come from

ZIP code 59020 is matched to the NOAA station Cooke City 2 W, MT, 6.1 km away, at 7,483 ft elevation (493 ft lower than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Cooke City 2 W, MT (used)	7,483 ft	—	—
Silver Gate, MT	7,495 ft	—	—
Mystic Lake, MT	6,544 ft	Jun 5	Sep 14
Lamar Rs, WY	6,575 ft	—	—

Frost dates near Cooke City

Silver Gate, MT 59081 · last —, first —
Roscoe, MT 59071 · last Jun 3, first Sep 19
Nye, MT 59061 · last Jun 1, first Sep 11
Fishtail, MT 59028 · last Jun 3, first Sep 19
Gardiner, MT 59030 · last —, first —
Red Lodge, MT 59068 · last Jun 3, first Sep 19
Bearcreek, MT 59007 · last May 18, first Sep 22
Yellowstone National Park, WY 82190 · last —, first —

Frequently asked questions

When is the last frost in Cooke City, MT?: Frost is possible in any month at the nearest NOAA station (Cooke City 2 W, MT), so there is no reliable average last frost date.
When is the first frost in Cooke City, MT?: Frost is possible in any month at the nearest NOAA station.
Are these frost dates a forecast?: No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.