Colorado Frost Dates
Colorado gardeners work with a compressed season in many areas, shaped by elevation, dry air, and fast weather swings. Late spring frost and early fall frost are common concerns away from the mildest pockets, especially in mountain valleys and exposed high plains locations.
Look up your exact frost dates
Frost timing shifts across Colorado with elevation and distance from water. Enter your ZIP code for dates from your nearest weather station.
Colorado locations
| ZIP | Area | Hardiness zone |
|---|---|---|
| 80033 | Wheat Ridge | 6a |
| 80112 | Inverness | 6a |
| 80123 | Denver | 6a |
| 80132 | Monument | 5b |
| 80204 | Denver | 6a |
| 80215 | Lakewood | 6a |
| 80234 | Westminster | 6a |
| 80238 | Denver | 6a |
| 80310 | Boulder | 6a |
| 80457 | Kittredge | 5b |
| 80501 | Longmont | 5b |
| 80728 | Fleming | 5b |
| 80834 | Seibert | 5b |
| 80836 | Stratton | 6a |
| 80914 | Colorado Springs | 6a |
| 80916 | Colorado Springs | 6a |
| 81030 | Cheraw | 6a |
| 81101 | Alamosa East | 4b |
| 81503 | Orchard Mesa | 7a |
| 81506 | Grand Junction | 7a |
| 69168 | Venango | 5b |
| 80002 | Arvada | 6a |
| 80003 | Arvada | 6a |
| 80004 | Arvada | 6a |
| 80005 | Arvada | 6a |
| 80007 | Arvada | 6a |
| 80010 | Aurora | 6a |
| 80011 | Aurora | 6a |
| 80012 | Aurora | 6a |
| 80013 | Aurora | 6a |
| 80014 | Aurora | 6a |
| 80015 | Aurora | 6a |
| 80016 | Aurora | 6a |
| 80017 | Aurora | 6a |
| 80018 | Aurora | 6a |
| 80019 | Aurora | 6a |
| 80020 | Broomfield | 6a |
| 80021 | Westminster | 6a |
| 80022 | Commerce City | 6a |
| 80023 | Broomfield | 6a |
| 80024 | Derby | 6a |
| 80025 | Eldorado Springs | 6a |
| 80026 | Erie | 6a |
| 80027 | Superior | 6a |
| 80030 | Westminster | 6a |
| 80031 | Westminster | 6a |
| 80045 | Aurora | 6a |
| 80101 | Deer Trail | 5b |
| 80102 | Bennett | 6a |
| 80103 | Byers | 5b |
| 80104 | Castle Rock | 5b |
| 80105 | Deer Trail | 5b |
| 80106 | Elbert | 5b |
| 80107 | Ponderosa Park | 5b |
| 80108 | Castle Pines | 5b |
| 80109 | Castle Rock | 5b |
| 80110 | Sheridan | 6a |
| 80111 | Greenwood Village | 6a |
| 80113 | Cherry Hills Village | 6a |
| 80116 | Franktown | 5b |
Source: NOAA 1991–2020 U.S. Climate Normals (public domain) and USDA 2023 Plant Hardiness Zone Map. Page updated Aug 4, 2026.