Frost dates for Wickiup Dam, OR
At Wickiup Dam, the median last spring frost (32°F) is Jun 7 and the median first fall frost is Sep 18, for a typical growing season of 100 days. For a 90% chance that the last frost has passed, wait until Jul 2. Nearby ZIP codes are in USDA hardiness zone 6b.
- Jun 7Last spring frost (median)50% chance of 32°F after this date
- Jul 2Safer planting date10% chance of 32°F after this date
- Sep 18First fall frost (median)50% chance of 32°F by this date
- 100 daysGrowing season (median)between 32°F freezes
USDA hardiness zone 6b (-5 to 0°F) · see all zone 6b frost dates
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 |
|---|---|---|---|
| 32°F | May 16 | Jun 7 | Jul 2 |
| 28°F | Apr 28 | May 16 | Jun 13 |
| 24°F | Apr 2 | Apr 29 | May 23 |
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 |
|---|---|---|---|
| 32°F | Sep 3 | Sep 18 | Oct 3 |
| 28°F | Sep 17 | Oct 3 | Oct 18 |
| 24°F | Oct 2 | Oct 19 | 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 | 39 days | 65 days | 90 days |
| 32°F | 69 days | 100 days | 128 days |
| 28°F | 107 days | 141 days | 167 days |
| 24°F | 145 days | 174 days | 205 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 |
|---|---|---|---|
| 97739 | 6b | -5 to 0°F | 16 km |
| 97709 | 6b | -5 to 0°F | 28 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 USC00359316, at 43.6825, -121.6875, elevation 1328 m (4,358 ft).
- Data quality: Standard (24+ years of data), 27 years of freeze data.
- Average days per year at or below 32°F: 200.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Odell Lake-East (27 km)
- Sunriver (32 km)
- Chemult (51 km)
- Bend (53 km)
- Lemolo Lake 3 NNW (56 km)
- Oakridge Fish Hatchery (61 km)
- Bend 7 NE (62 km)
- McKenzie River Ranger Station (65 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.