When is the last frost in Toponas, CO?

For ZIP code 80479, the average last spring frost (32°F) is June 14, based on NOAA 1991-2020 climate normals for the Yampa, CO weather station. There is a 1-in-10 chance of a frost after June 28.

When is the first frost in Toponas, CO?

The average first fall frost (32°F) is September 11. There is a 1-in-10 chance of frost by August 29, so tender plants are at risk from that point on.

How long is the growing season in 80479?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 89 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 80479Toponas, CO

The average last spring frost in Toponas is June 14 and the average first fall frost is September 11, giving a typical growing season of about 89 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jun 14
Average first fall frost: Sep 11
Growing season: 89 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)	—	—	63 days	100%
Frost / freeze (32°F)	Jun 1 · Jun 14 · Jun 28	Aug 29 · Sep 11 · Sep 23	89 days	100%
Hard freeze (28°F)	May 16 · May 31 · Jun 13	Sep 8 · Sep 20 · Oct 1	113 days	100%

Where these dates come from

ZIP code 80479 is matched to the NOAA station Yampa, CO, 13.8 km away, at 7,857 ft elevation (427 ft lower than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Yampa, CO (used)	7,857 ft	Jun 14	Sep 11
Kremmling, CO	7,460 ft	Jun 14	Sep 5
Green Mt Dam, CO	7,741 ft	Jun 6	Sep 14
Steamboat Springs, CO	6,866 ft	Jun 9	Sep 12

Frost dates near Toponas

Yampa, CO 80483 · last Jun 14, first Sep 11
Mc Coy, CO 80463 · last Jun 14, first Sep 5
Phippsburg, CO 80469 · last Jun 14, first Sep 11
Burns, CO 80426 · last May 13, first Oct 3
Bond, CO 80423 · last Jun 14, first Sep 5
Oak Creek, CO 80467 · last Jun 14, first Sep 11
Kremmling, CO 80459 · last Jun 14, first Sep 5
Wolcott, CO 81655 · last Jun 14, first Sep 5

Frequently asked questions

When is the last frost in Toponas, CO?: For ZIP code 80479, the average last spring frost (32°F) is June 14, based on NOAA 1991-2020 climate normals for the Yampa, CO weather station. There is a 1-in-10 chance of a frost after June 28.
When is the first frost in Toponas, CO?: The average first fall frost (32°F) is September 11. There is a 1-in-10 chance of frost by August 29, so tender plants are at risk from that point on.
How long is the growing season in 80479?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 89 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.