Frost dates for Sheaville 1 SE, OR
At Sheaville 1 SE, the median last spring frost (32°F) is May 22 and the median first fall frost is Sep 28, for a typical growing season of 126 days. For a 90% chance that the last frost has passed, wait until Jun 14. Nearby ZIP codes are in USDA hardiness zones 6b to 7a.
- May 22Last spring frost (median)50% chance of 32°F after this date
- Jun 14Safer planting date10% chance of 32°F after this date
- Sep 28First fall frost (median)50% chance of 32°F by this date
- 126 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 | May 22 | Jun 9 | Jun 28 |
| 32°F | May 3 | May 22 | Jun 14 |
| 28°F | Apr 18 | May 3 | May 27 |
| 24°F | Mar 29 | Apr 19 | May 7 |
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 1 | Sep 16 | Oct 1 |
| 32°F | Sep 11 | Sep 28 | Oct 13 |
| 28°F | Sep 26 | Oct 10 | Oct 28 |
| 24°F | Oct 5 | Oct 23 | Nov 8 |
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 | 72 days | 97 days | 121 days |
| 32°F | 101 days | 126 days | 153 days |
| 28°F | 132 days | 157 days | 181 days |
| 24°F | 160 days | 186 days | 213 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 |
|---|---|---|---|
| 83639 | 7a | 0 to 5°F | 33 km |
| 83650 | 7a | 0 to 5°F | 39 km |
| 83641 | 7a | 0 to 5°F | 41 km |
| 97902 | 6b | -5 to 0°F | 44 km |
| 97910 | 6b | -5 to 0°F | 48 km |
| 83628 | 7a | 0 to 5°F | 51 km |
| 97901 | 7a | 0 to 5°F | 52 km |
| 83686 | 7a | 0 to 5°F | 55 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 USC00357736, at 43.1211, -117.0392, elevation 1408 m (4,620 ft).
- Data quality: Estimated from nearby stations (2+ years), 13 years of freeze data.
- Average days per year at or below 32°F: 175.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Rockville 5 N (28 km)
- Rome 2 NW (58 km)
- Owyhee Dam (61 km)
- Nyssa (84 km)
- Rome St. Airport (89 km)
- Malheur Branch Exp. Station (95 km)
- Vale (97 km)
- Ontario Muni Airport (100 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.