Frost dates for Logan Utah St. Univ, UT
At Logan Utah St. Univ, the median last spring frost (32°F) is Apr 30 and the median first fall frost is Oct 16, for a typical growing season of 166 days. For a 90% chance that the last frost has passed, wait until May 19. Nearby ZIP codes are in USDA hardiness zone 6a.
- Apr 30Last spring frost (median)50% chance of 32°F after this date
- May 19Safer planting date10% chance of 32°F after this date
- Oct 16First fall frost (median)50% chance of 32°F by this date
- 166 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 17 | Jun 7 |
| 32°F | Apr 14 | Apr 30 | May 19 |
| 28°F | Mar 28 | Apr 15 | May 2 |
| 24°F | Mar 10 | Mar 31 | Apr 17 |
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 22 | Oct 5 | Oct 18 |
| 32°F | Oct 1 | Oct 16 | Oct 29 |
| 28°F | Oct 12 | Oct 27 | Nov 11 |
| 24°F | Oct 23 | Nov 6 | Nov 22 |
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 | 114 days | 139 days | 162 days |
| 32°F | 143 days | 166 days | 188 days |
| 28°F | 172 days | 196 days | 219 days |
| 24°F | 197 days | 222 days | 247 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 |
|---|---|---|---|
| 84341 | 6a | -10 to -5°F | 3 km |
| 84332 | 6a | -10 to -5°F | 5 km |
| 84321 | 6a | -10 to -5°F | 8 km |
| 84319 | 6a | -10 to -5°F | 21 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 USC00425186, at 41.7456, -111.8033, elevation 1460 m (4,790 ft).
- Data quality: Standard (24+ years of data), 25 years of freeze data.
- Average days per year at or below 32°F: 136.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Logan Radio Kvnu (5 km)
- Logan Cache Airport (6 km)
- Logan 5 SW Exp. Farm (11 km)
- Richmond (18 km)
- Trenton (21 km)
- Cutler Dam (23 km)
- Tremonton (30 km)
- Brigham City Waste Plant (32 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.