Frost dates for Cody, WY
At Cody, the median last spring frost (32°F) is May 12 and the median first fall frost is Oct 1, for a typical growing season of 140 days. For a 90% chance that the last frost has passed, wait until May 27. Nearby ZIP codes are in USDA hardiness zones 4b to 5a.
- May 12Last spring frost (median)50% chance of 32°F after this date
- May 27Safer planting date10% chance of 32°F after this date
- Oct 1First fall frost (median)50% chance of 32°F by this date
- 140 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 11 | May 25 | Jun 11 |
| 32°F | Apr 27 | May 12 | May 27 |
| 28°F | Apr 12 | Apr 30 | May 16 |
| 24°F | Mar 31 | Apr 17 | May 5 |
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 6 | Sep 21 | Oct 4 |
| 32°F | Sep 17 | Oct 1 | Oct 14 |
| 28°F | Sep 27 | Oct 10 | Oct 27 |
| 24°F | Oct 3 | Oct 19 | Nov 5 |
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 | 97 days | 117 days | 138 days |
| 32°F | 120 days | 140 days | 160 days |
| 28°F | 140 days | 162 days | 184 days |
| 24°F | 161 days | 184 days | 208 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 |
|---|---|---|---|
| 82450 | 5a | -20 to -15°F | 26 km |
| 82440 | 5a | -20 to -15°F | 31 km |
| 82435 | 5a | -20 to -15°F | 36 km |
| 82414 | 5a | -20 to -15°F | 41 km |
| 82433 | 4b | -25 to -20°F | 49 km |
| 82411 | 5a | -20 to -15°F | 51 km |
| 82412 | 5a | -20 to -15°F | 55 km |
| 82422 | 5a | -20 to -15°F | 58 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 USC00481840, at 44.5022, -109.1111, elevation 1609 m (5,280 ft).
- Data quality: Standard (24+ years of data), 30 years of freeze data.
- Average days per year at or below 32°F: 153.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Buffalo Bill Dam (5 km)
- Cody 12se (19 km)
- Wapiti 1wsw (25 km)
- Heart Mountain (26 km)
- Cody 21 SW (29 km)
- Powell Field Station (41 km)
- Clark 3ne (48 km)
- Sunshine 3ne (49 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.