Frost dates for Orem Trtmt Plant, UT
At Orem Trtmt Plant, the median last spring frost (32°F) is Apr 19 and the median first fall frost is Oct 19, for a typical growing season of 182 days. For a 90% chance that the last frost has passed, wait until May 9. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 19Last spring frost (median)50% chance of 32°F after this date
- May 9Safer planting date10% chance of 32°F after this date
- Oct 19First fall frost (median)50% chance of 32°F by this date
- 182 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 19 | May 2 | May 22 |
| 32°F | Apr 2 | Apr 19 | May 9 |
| 28°F | Mar 13 | Apr 1 | Apr 20 |
| 24°F | Feb 27 | Mar 14 | Apr 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 28 | Oct 8 | Oct 22 |
| 32°F | Oct 5 | Oct 19 | Nov 3 |
| 28°F | Oct 16 | Oct 31 | Nov 15 |
| 24°F | Oct 25 | Nov 11 | Nov 25 |
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 | 135 days | 157 days | 177 days |
| 32°F | 158 days | 182 days | 205 days |
| 28°F | 186 days | 210 days | 234 days |
| 24°F | 210 days | 237 days | 262 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 |
|---|---|---|---|
| 84058 | 7a | 0 to 5°F | 2 km |
| 84059 | 7a | 0 to 5°F | 3 km |
| 84057 | 7a | 0 to 5°F | 5 km |
| 84097 | 7a | 0 to 5°F | 6 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 USC00426538, at 40.2767, -111.7369, elevation 1375 m (4,510 ft).
- Data quality: Representative (10+ years), 14 years of freeze data.
- Average days per year at or below 32°F: 108.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Provo Byu (8 km)
- Pleasant Grove (10 km)
- Utah Lake Lehi (16 km)
- Sundance (19 km)
- Timpanogos Cave (19 km)
- Alpine (21 km)
- Deer Creek Dam (23 km)
- Spanish Fk Power House (25 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.