Frost dates for Weber Basin Pump Plant 3, UT
At Weber Basin Pump Plant 3, the median last spring frost (32°F) is Apr 29 and the median first fall frost is Oct 20, for a typical growing season of 172 days. For a 90% chance that the last frost has passed, wait until May 25. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 29Last spring frost (median)50% chance of 32°F after this date
- May 25Safer planting date10% chance of 32°F after this date
- Oct 20First fall frost (median)50% chance of 32°F by this date
- 172 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 26 | May 15 | Jun 10 |
| 32°F | Apr 6 | Apr 29 | May 25 |
| 28°F | Mar 16 | Apr 13 | May 5 |
| 24°F | Feb 28 | Mar 26 | Apr 21 |
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 24 | Oct 7 | Oct 23 |
| 32°F | Oct 1 | Oct 20 | Nov 5 |
| 28°F | Oct 18 | Nov 2 | Nov 15 |
| 24°F | Oct 28 | Nov 12 | 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 | 114 days | 141 days | 169 days |
| 32°F | 140 days | 172 days | 200 days |
| 28°F | 172 days | 203 days | 229 days |
| 24°F | 199 days | 229 days | 260 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 |
|---|---|---|---|
| 84040 | 7a | 0 to 5°F | 2 km |
| 84405 | 7a | 0 to 5°F | 6 km |
| 84056 | 7a | 0 to 5°F | 7 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 USC00429346, at 41.1092, -111.9125, elevation 1494 m (4,900 ft).
- Data quality: Representative (10+ years), 10 years of freeze data.
- Average days per year at or below 32°F: 132.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Farmington 3 NW (10 km)
- Ogden Hinkley Airport (13 km)
- Ogden Pioneer Ph (15 km)
- Ogden NE Bench (15 km)
- Ogden Sugar Factory (17 km)
- Pineview Dam (18 km)
- Morgan (20 km)
- Huntsville Monastery (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.