When is the last frost in Kremmling, CO?

For ZIP code 80459, the average last spring frost (32°F) is June 14, based on NOAA 1991-2020 climate normals for the Kremmling, CO weather station. There is a 1-in-10 chance of a frost after June 30.

When is the first frost in Kremmling, CO?

The average first fall frost (32°F) is September 5. There is a 1-in-10 chance of frost by August 26, so tender plants are at risk from that point on.

How long is the growing season in 80459?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 80 days long.

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 80459Kremmling, CO

The average last spring frost in Kremmling is June 14 and the average first fall frost is September 5, giving a typical growing season of about 80 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jun 14
Average first fall frost: Sep 5
Growing season: 80 days

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)	—	—	49 days	100%
Frost / freeze (32°F)	Jun 1 · Jun 14 · Jun 30	Aug 26 · Sep 5 · Sep 16	80 days	100%
Hard freeze (28°F)	May 13 · May 28 · Jun 11	Sep 4 · Sep 16 · Sep 27	110 days	100%

Where these dates come from

ZIP code 80459 is matched to the NOAA station Kremmling, CO, 2.4 km away, at 7,460 ft elevation (117 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Kremmling, CO (used)	7,460 ft	Jun 14	Sep 5
Williams Fork Dam, CO	7,618 ft	Jun 12	Sep 10
Green Mt Dam, CO	7,741 ft	Jun 6	Sep 14
Yampa, CO	7,857 ft	Jun 14	Sep 11

Frost dates near Kremmling

Hot Sulphur Springs, CO 80451 · last Jun 12, first Sep 10
Parshall, CO 80468 · last —, first —
Bond, CO 80423 · last Jun 14, first Sep 5
Mc Coy, CO 80463 · last Jun 14, first Sep 5
Toponas, CO 80479 · last Jun 14, first Sep 11
Silverthorne, CO 80498 · last —, first —
Granby, CO 80446 · last Jun 13, first Sep 7
Yampa, CO 80483 · last Jun 14, first Sep 11

Frequently asked questions

When is the last frost in Kremmling, CO?: For ZIP code 80459, the average last spring frost (32°F) is June 14, based on NOAA 1991-2020 climate normals for the Kremmling, CO weather station. There is a 1-in-10 chance of a frost after June 30.
When is the first frost in Kremmling, CO?: The average first fall frost (32°F) is September 5. There is a 1-in-10 chance of frost by August 26, so tender plants are at risk from that point on.
How long is the growing season in 80459?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 80 days long.
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.