When is the last frost in Maybell, CO?

For ZIP code 81640, the average last spring frost (32°F) is June 16, based on NOAA 1991-2020 climate normals for the Maybell, CO weather station. There is a 1-in-10 chance of a frost after July 1.

When is the first frost in Maybell, CO?

The average first fall frost (32°F) is September 9. 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 81640?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 83 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 81640Maybell, CO

The average last spring frost in Maybell is June 16 and the average first fall frost is September 9, giving a typical growing season of about 83 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jun 16
Average first fall frost: Sep 9
Growing season: 83 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)	—	—	57 days	100%
Frost / freeze (32°F)	May 31 · Jun 16 · Jul 1	Aug 26 · Sep 9 · Sep 22	83 days	100%
Hard freeze (28°F)	May 15 · Jun 1 · Jun 18	Sep 5 · Sep 19 · Oct 1	109 days	100%

Where these dates come from

ZIP code 81640 is matched to the NOAA station Maybell, CO, 29.1 km away, at 5,944 ft elevation (25 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Maybell, CO (used)	5,944 ft	Jun 16	Sep 9
Massadona 3E, CO	6,140 ft	May 10	Oct 4
Dinosaur 2 E, CO	6,062 ft	May 2	Oct 14
Dinosaur Nm, CO	5,960 ft	May 12	Oct 5

Frost dates near Maybell

Dinosaur, CO 81633 · last May 10, first Oct 4
Craig, CO 81625 · last Jun 6, first Sep 12
Baggs, WY 82321 · last Jun 1, first Sep 18
Rangely, CO 81648 · last May 15, first Oct 1
Hamilton, CO 81638 · last May 29, first Sep 20
Meeker, CO 81641 · last Jun 4, first Sep 16
Dixon, WY 82323 · last Jun 1, first Sep 18
Jensen, UT 84035 · last May 20, first Sep 25

Frequently asked questions

When is the last frost in Maybell, CO?: For ZIP code 81640, the average last spring frost (32°F) is June 16, based on NOAA 1991-2020 climate normals for the Maybell, CO weather station. There is a 1-in-10 chance of a frost after July 1.
When is the first frost in Maybell, CO?: The average first fall frost (32°F) is September 9. 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 81640?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 83 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.