Frost dates for Sexton Summit, OR
At Sexton Summit, the median last spring frost (32°F) is May 16 and the median first fall frost is Oct 30, for a typical growing season of 164 days. For a 90% chance that the last frost has passed, wait until Jun 7. Nearby ZIP codes are in USDA hardiness zone 8b.
- May 16Last spring frost (median)50% chance of 32°F after this date
- Jun 7Safer planting date10% chance of 32°F after this date
- Oct 30First fall frost (median)50% chance of 32°F by this date
- 164 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 16 | Jun 7 | Jun 25 |
| 32°F | Apr 23 | May 16 | Jun 7 |
| 28°F | Mar 23 | Apr 23 | May 17 |
| 24°F | Jan 20 | Mar 18 | 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 15 | Oct 9 | Nov 1 |
| 32°F | Oct 8 | Oct 30 | Nov 17 |
| 28°F | Oct 28 | Nov 17 | Dec 10 |
| 24°F | Nov 14 | Dec 9 | Jan 24 |
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 | 89 days | 122 days | 150 days |
| 32°F | 134 days | 164 days | 197 days |
| 28°F | 175 days | 211 days | 247 days |
| 24°F | 223 days | 269 days | 330 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 99% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 97526 | 8b | 15 to 20°F | 7 km |
| 97497 | 8b | 15 to 20°F | 9 km |
| 97537 | 8b | 15 to 20°F | 19 km |
| 97532 | 8b | 15 to 20°F | 26 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 USW00024235, at 42.6003, -123.3642, elevation 1168 m (3,832 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 90.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Grants Pass (20 km)
- Riddle (39 km)
- Medford Rogue Valley Airport (47 km)
- Ruch (49 km)
- Cave Junction 1 WNW (54 km)
- Illahe (57 km)
- Lost Creek Dam (57 km)
- Powers (66 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.