Frost dates for Northdale, CO
At Northdale, the median last spring frost (32°F) is Jun 3 and the median first fall frost is Sep 25, for a typical growing season of 113 days. For a 90% chance that the last frost has passed, wait until Jun 19. Nearby ZIP codes are in USDA hardiness zones 6b to 7a.
- Jun 3Last spring frost (median)50% chance of 32°F after this date
- Jun 19Safer planting date10% chance of 32°F after this date
- Sep 25First fall frost (median)50% chance of 32°F by this date
- 113 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Jun 2 | Jun 16 | Jun 30 |
| 32°F | May 19 | Jun 3 | Jun 19 |
| 28°F | May 3 | May 21 | Jun 6 |
| 24°F | Apr 15 | May 1 | May 21 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Sep 3 | Sep 16 | Sep 28 |
| 32°F | Sep 12 | Sep 25 | Oct 6 |
| 28°F | Sep 22 | Oct 4 | Oct 17 |
| 24°F | Oct 1 | Oct 14 | Oct 31 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 69 days | 90 days | 109 days |
| 32°F | 91 days | 113 days | 130 days |
| 28°F | 115 days | 135 days | 158 days |
| 24°F | 139 days | 164 days | 186 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 81324 | 6b | -5 to 0°F | 19 km |
| 84535 | 6b | -5 to 0°F | 25 km |
| 81320 | 6b | -5 to 0°F | 27 km |
| 81325 | 6b | -5 to 0°F | 29 km |
| 81335 | 6b | -5 to 0°F | 39 km |
| 81331 | 6b | -5 to 0°F | 42 km |
| 81327 | 6b | -5 to 0°F | 45 km |
| 84511 | 7a | 0 to 5°F | 47 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00055970, at 37.8122, -109.0133, elevation 2036 m (6,681 ft).
- Data quality: Representative (10+ years), 17 years of freeze data.
- Average days per year at or below 32°F: 197.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Dove Creek (10 km)
- Yellow Jacket 2w (40 km)
- Yellow Jacket 4ne (42 km)
- Cortez (64 km)
- Paradox 2n (64 km)
- Cortez Montezuma Co Airport (66 km)
- Uravan (67 km)
- Norwood (73 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.