U.S. Frost Dates by Weather Station

NOAA station USC00058184 · Colorado

Frost Dates for Taylor Park, CO

NOAA weather station Taylor Park (USC00058184), Colorado · elevation 9179 ft (2798 m) · hardiness zone 3b*

  • Lower-risk planting dateafter July 2only 1 spring in 10 still has a frost later
  • Typical last frostJune 2050% chance of a frost after it
  • Typical first fall frostSeptember 850% chance of a frost before it
  • Frost-free season80 daystypical year, 32°F
  • Hardiness zone3bcalculated*

The year at a glance

Frost season at Taylor Park, COSpring: a frost after June 7 in 9 years out of 10, after June 20 in half of the years, after July 2 in 1 year out of 10. Fall: the first frost comes before August 25 in 1 year out of 10, before September 8 in half of the years, before September 19 in 9 years out of 10. Typical frost-free season: 80 days.JanFebMarAprMayJunJulAugSepOctNovDecLast frost ~Jun 20First frost ~Sep 8Frost season at Taylor Park, COSpring: a frost after June 7 in 9 years out of 10, after June 20 in half of the years, after July 2 in 1 year out of 10. Fall: the first frost comes before August 25 in 1 year out of 10, before September 8 in half of the years, before September 19 in 9 years out of 10. Typical frost-free season: 80 days.JFMAMJJASONDLast frost ~Jun 20First frost ~Sep 8
frost likely chance fading 90% → 10% frost-free in a typical yearThe year at a glance. Blue: frost is likely; the gradient fades as the chance drops from 90% to 10%; green: the frost-free part of a typical year.

Frost dates (32°F)

Probability of frost, based on 26 years of NOAA records (1991–2020 normals)
ChanceLast frost in spring afterFirst frost in fall before
10% (unlikely)July 2August 25
50% (typical)June 20September 8
90% (likely)June 7September 19
Frost-free season (32°F, 50% chance)
80 days
Hard frost (28°F), last in spring, 50% chance after
June 2
Hard frost (28°F), first in fall, 50% chance before
September 22

The last 15 years (2006–2020 normals)

Typical last frost June 17 (3 days earlier than the 30-year normal), typical first fall frost September 11 (3 days later). Frost-free season 85 days.

A shorter, more recent NOAA period. The 30-year normals above remain the main reference: 15 years carry more year-to-year noise.

Add these dates to your calendar Yearly reminders for the typical last frost, the lower-risk planting date and the typical first fall frost (.ics).

How the chance of frost changes with the date

Spring at Taylor Park: chance of a frost after this dateSpring, chance of a frost after the date: 10% July 2, 20% June 28, 30% June 25, 40% June 22, 50% June 20, 60% June 17, 70% June 14, 80% June 11, 90% June 7. Observed last spring frost in recent years: 2021 June 12, 2022 June 21, 2023 June 26, 2024 June 2.Spring: last frostChance of a frost after this date10%50%90%Jun 1Jul 1Jul 2Jun 20Jun 72021: June 122022: June 212023: June 262024: June 2Fall at Taylor Park: chance of a frost before this dateFall, chance of a frost before the date: 10% August 25, 20% August 31, 30% September 3, 40% September 5, 50% September 8, 60% September 10, 70% September 12, 80% September 15, 90% September 19. Observed first fall frost in recent years: 2021 August 25, 2022 September 11, 2023 August 8.Fall: first frostChance of a frost before this date10%50%90%Aug 1Sep 1Oct 1Aug 25Sep 8Sep 192021: August 252022: September 112023: August 8
Two charts, because spring and fall answer different questions: in spring, the chance that a frost still comes after a date; in fall, the chance that the first frost has already come before it. NOAA publishes these odds from 10% to 90%, so the lines stop there. ◆ marks the actual date in each recent year.

What actually happened in recent years

Observed dates of the last spring and first fall frost (32°F) at this station; ◆ marks them on the charts above
YearLast spring frostFirst fall frost
2021June 12August 25
2022June 21September 11
2023June 26August 8
2024June 2incomplete record
2025incomplete recordno data
2026no dataseason not over yet

What these dates mean

August 25 is the cautious fall date for finishing the harvest of tender crops in Taylor Park, because there is only a 10 % chance that a light frost has arrived earlier. In spring the cautious date for setting out tender crops is July 2, when the chance of a light frost later than that day is just 10 %; planting on June 7 would be a gamble with a 90 % chance of frost afterward.

For a gardener the 50 % dates mark the point of even odds: the 50 % date in spring is June 20 and the 50 % date in fall is September 8; these are not frost dates but the moments when a frost is equally likely to have occurred or not. The 50 % dates for hard frost are June 2 and September 22. A hard frost at 28 °F can damage plants that survive a light frost at 32 °F, so it represents a higher risk to tender crops.

How to read the probabilities

The dates are probabilities from 30 years of weather, not a forecast for this year.

  • Spring: "10% after July 2" means that in about one spring out of ten a frost still happens after that date. The 90% date is the earliest: a frost after it happens in most years.
  • Fall: "10% before August 25" means that in about one fall out of ten the first frost arrives before that date.
  • 50% is the typical date: half of the years are earlier, half are later.
  • A light frost (32°F) damages tender plants; a hard frost (28°F) also stops most hardy vegetables.

Nearby weather stations

Map of weather stations near Taylor Park, CONumbered nearest stations: 1 — Buena Vista, CO — 26 mi; 2 — Cochetopa Creek, CO — 27 mi; 3 — Paonia, CO — 55 mi; 4 — Lake George 8 SW, CO — 62 mi; 5 — Grant, CO — 67 mi.CO25 mi · 40 km1. Buena Vista, CO — 26 mi12. Cochetopa Creek, CO — 27 mi23. Paonia, CO — 55 mi34. Lake George 8 SW, CO — 62 mi45. Grant, CO — 67 mi5
  1. Buena Vista, CO 26 mi (42 km)
  2. Cochetopa Creek, CO 27 mi (44 km)
  3. Paonia, CO 55 mi (88 km)
  4. Lake George 8 SW, CO 62 mi (99 km)
  5. Grant, CO 67 mi (107 km)

Sources

* Hardiness zone 3b: zone derived from PRISM 2023 grid at the station location (not the official USDA map). Source data: PRISM Group, Oregon State University.

Station coordinates: 38.8183, -106.6086.