Frost dates for Leroy 5 WSW, CO
At Leroy 5 WSW, the median last spring frost (32°F) is May 10 and the median first fall frost is Oct 6, for a typical growing season of 147 days. For a 90% chance that the last frost has passed, wait until May 22. Nearby ZIP codes are in USDA hardiness zone 5b.
- May 10Last spring frost (median)50% chance of 32°F after this date
- May 22Safer planting date10% chance of 32°F after this date
- Oct 6First fall frost (median)50% chance of 32°F by this date
- 147 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 | May 8 | May 18 | May 31 |
| 32°F | Apr 28 | May 10 | May 22 |
| 28°F | Apr 17 | Apr 30 | May 13 |
| 24°F | Apr 3 | Apr 21 | May 4 |
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 13 | Sep 27 | Oct 9 |
| 32°F | Sep 22 | Oct 6 | Oct 18 |
| 28°F | Oct 2 | Oct 15 | Oct 26 |
| 24°F | Oct 11 | Oct 23 | Nov 6 |
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 | 112 days | 129 days | 146 days |
| 32°F | 127 days | 147 days | 163 days |
| 28°F | 147 days | 165 days | 183 days |
| 24°F | 165 days | 184 days | 203 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 |
|---|---|---|---|
| 80728 | 5b | -15 to -10°F | 17 km |
| 80722 | 5b | -15 to -10°F | 18 km |
| 80751 | 5b | -15 to -10°F | 26 km |
| 80736 | 5b | -15 to -10°F | 33 km |
| 80743 | 5b | -15 to -10°F | 33 km |
| 80731 | 5b | -15 to -10°F | 34 km |
| 80741 | 5b | -15 to -10°F | 42 km |
| 80733 | 5b | -15 to -10°F | 45 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 USC00054945, at 40.5147, -102.9906, elevation 1362 m (4,467 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 164.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Fleming 3sw (19 km)
- Sterling (22 km)
- Crook (42 km)
- Akron 4 E (42 km)
- Akron Washington Co Airport (43 km)
- Yuma (49 km)
- Holyoke (55 km)
- Sedgwick 5 S (56 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.