Frost dates for Salt Lake City E Bench, UT
At Salt Lake City E Bench, the median last spring frost (32°F) is Apr 25 and the median first fall frost is Oct 18, for a typical growing season of 175 days. For a 90% chance that the last frost has passed, wait until May 10. Nearby ZIP codes are in USDA hardiness zones 7a to 7b.
- Apr 25Last spring frost (median)50% chance of 32°F after this date
- May 10Safer planting date10% chance of 32°F after this date
- Oct 18First fall frost (median)50% chance of 32°F by this date
- 175 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 24 | May 8 | May 29 |
| 32°F | Apr 7 | Apr 25 | May 10 |
| 28°F | Mar 19 | Apr 7 | Apr 26 |
| 24°F | Mar 3 | Mar 22 | Apr 11 |
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 28 | Oct 8 | Oct 21 |
| 32°F | Oct 5 | Oct 18 | Nov 1 |
| 28°F | Oct 15 | Oct 29 | Nov 15 |
| 24°F | Oct 22 | Nov 9 | Nov 28 |
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 | 130 days | 152 days | 172 days |
| 32°F | 156 days | 175 days | 198 days |
| 28°F | 179 days | 204 days | 229 days |
| 24°F | 205 days | 231 days | 258 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 |
|---|---|---|---|
| 84113 | 7a | 0 to 5°F | 3 km |
| 84105 | 7b | 5 to 10°F | 4 km |
| 84112 | 7a | 0 to 5°F | 4 km |
| 84106 | 7b | 5 to 10°F | 5 km |
| 84123 | 7b | 5 to 10°F | 12 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 USC00427655, at 40.7364, -111.8172, elevation 1478 m (4,850 ft).
- Data quality: Representative (10+ years), 12 years of freeze data.
- Average days per year at or below 32°F: 118.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Salt Lake Triad Center (8 km)
- Mountain Dell Dam (8 km)
- City Creek Water Plant (9 km)
- Cottonwood Weir (13 km)
- Salt Lake City Intl Airport (14 km)
- Bountiful-Val Verda (15 km)
- Bountiful Bench (17 km)
- Alta (22 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.