Frost dates for Laramie 2 NW, WY
At Laramie 2 NW, the median last spring frost (32°F) is Jun 7 and the median first fall frost is Sep 4, for a typical growing season of 88 days. For a 90% chance that the last frost has passed, wait until Jun 29. Nearby ZIP codes are in USDA hardiness zone 4a.
- Jun 7Last spring frost (median)50% chance of 32°F after this date
- Jun 29Safer planting date10% chance of 32°F after this date
- Sep 4First fall frost (median)50% chance of 32°F by this date
- 88 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 |
|---|---|---|---|
| 32°F | May 23 | Jun 7 | Jun 29 |
| 28°F | May 9 | May 22 | Jun 6 |
| 24°F | Apr 30 | May 10 | May 24 |
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 |
|---|---|---|---|
| 32°F | Aug 17 | Sep 4 | Sep 18 |
| 28°F | Sep 2 | Sep 14 | Sep 29 |
| 24°F | Sep 10 | Sep 24 | Oct 9 |
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 | 33 days | 53 days | 79 days |
| 32°F | 61 days | 88 days | 110 days |
| 28°F | 95 days | 116 days | 135 days |
| 24°F | 119 days | 136 days | 155 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 82072 | 4a | -30 to -25°F | 11 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 USC00485435, at 41.3400, -105.6064, elevation 2176 m (7,140 ft).
- Data quality: Representative (10+ years), 18 years of freeze data.
- Average days per year at or below 32°F: 217.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Laramie Regional Airport (7 km)
- Laramie 4se (9 km)
- Hecla 1e (42 km)
- Centennial 1ne (44 km)
- Sybille Rsch Unit (51 km)
- Cheyenne (70 km)
- Cheyenne WFO (70 km)
- Elk Mountain (78 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.