Frost dates for Cedar City, UT
At Cedar City, the median last spring frost (32°F) is May 4 and the median first fall frost is Oct 13, for a typical growing season of 159 days. For a 90% chance that the last frost has passed, wait until May 28. Nearby ZIP codes are in USDA hardiness zones 6a to 7a.
- May 4Last spring frost (median)50% chance of 32°F after this date
- May 28Safer planting date10% chance of 32°F after this date
- Oct 13First fall frost (median)50% chance of 32°F by this date
- 159 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 | Apr 30 | May 20 | Jun 8 |
| 32°F | Apr 19 | May 4 | May 28 |
| 28°F | Apr 3 | Apr 22 | May 13 |
| 24°F | Mar 12 | Apr 4 | May 1 |
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 23 | Oct 4 | Oct 19 |
| 32°F | Sep 30 | Oct 13 | Oct 28 |
| 28°F | Oct 6 | Oct 23 | Nov 10 |
| 24°F | Oct 16 | Nov 2 | Nov 20 |
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 | 115 days | 138 days | 163 days |
| 32°F | 133 days | 159 days | 181 days |
| 28°F | 154 days | 181 days | 206 days |
| 24°F | 181 days | 209 days | 239 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 |
|---|---|---|---|
| 84721 | 6b | -5 to 0°F | 12 km |
| 84742 | 6b | -5 to 0°F | 18 km |
| 84772 | 6b | -5 to 0°F | 19 km |
| 84720 | 6b | -5 to 0°F | 20 km |
| 84719 | 6a | -10 to -5°F | 27 km |
| 84757 | 7a | 0 to 5°F | 28 km |
| 84761 | 6a | -10 to -5°F | 28 km |
| 84762 | 6a | -10 to -5°F | 36 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 USC00421259, at 37.6658, -113.0836, elevation 1856 m (6,090 ft).
- Data quality: Representative (10+ years), 16 years of freeze data.
- Average days per year at or below 32°F: 140.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Cedar City Muni Airport (5 km)
- Cedar City 5e (8 km)
- Blowhard Mountain Radar (21 km)
- Brian Head (21 km)
- Cedar Breaks National Monument (23 km)
- New Harmony (29 km)
- Zion National Park (52 km)
- Enterprise Beryl Junction (52 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.