Frost dates for Big Water, UT
At Big Water, the median last spring frost (32°F) is Apr 8 and the median first fall frost is Nov 1, for a typical growing season of 204 days. For a 90% chance that the last frost has passed, wait until Apr 28. Nearby ZIP codes are in USDA hardiness zones 6a to 7b.
- Apr 8Last spring frost (median)50% chance of 32°F after this date
- Apr 28Safer planting date10% chance of 32°F after this date
- Nov 1First fall frost (median)50% chance of 32°F by this date
- 204 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 8 | Apr 25 | May 12 |
| 32°F | Mar 19 | Apr 8 | Apr 28 |
| 28°F | Mar 4 | Mar 21 | Apr 13 |
| 24°F | Feb 12 | Mar 3 | Mar 26 |
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 | Oct 8 | Oct 21 | Nov 4 |
| 32°F | Oct 18 | Nov 1 | Nov 13 |
| 28°F | Oct 27 | Nov 10 | Nov 21 |
| 24°F | Nov 7 | Nov 20 | Dec 4 |
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 | 156 days | 179 days | 201 days |
| 32°F | 181 days | 204 days | 227 days |
| 28°F | 205 days | 231 days | 252 days |
| 24°F | 233 days | 261 days | 286 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 |
|---|---|---|---|
| 86036 | 7b | 5 to 10°F | 35 km |
| 86040 | 7b | 5 to 10°F | 53 km |
| 84741 | 7a | 0 to 5°F | 53 km |
| 86053 | 7b | 5 to 10°F | 65 km |
| 84736 | 6b | -5 to 0°F | 66 km |
| 84718 | 6a | -10 to -5°F | 67 km |
| 84776 | 6a | -10 to -5°F | 72 km |
| 84726 | 7a | 0 to 5°F | 76 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 USC00420688, at 37.0769, -111.6639, elevation 1250 m (4,100 ft).
- Data quality: Representative (10+ years), 18 years of freeze data.
- Average days per year at or below 32°F: 103.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Paria Ranger Station (21 km)
- Kodachrome Basin Park (56 km)
- Bryce Canyon National Park Hqrs (77 km)
- Escalante (77 km)
- Kanab (78 km)
- Bryce Canyon Airport (82 km)
- Alton (83 km)
- Orderville (89 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.