Oregon · NOAA station USC00357857
Frost dates for Sisters, OR
Sisters can freeze in any month: NOAA flags it as having a year-round risk of 32°F, too cold to compute spring and fall frost dates. The median stretch between 32°F freezes is 57 days. Nearby ZIP codes are in USDA hardiness zones 6b to 7b.
- 100%Chance of 32°F in a year
- 57 daysMedian freeze-free stretch
- 202Days at or below 32°Faverage per year
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 |
|---|---|---|---|
| 97703 | 6b | -5 to 0°F | 18 km |
| 97760 | 6b | -5 to 0°F | 27 km |
| 97730 | 6b | -5 to 0°F | 28 km |
| 97756 | 6b | -5 to 0°F | 28 km |
| 97759 | 7a | 0 to 5°F | 29 km |
| 97734 | 7a | 0 to 5°F | 32 km |
| 97413 | 7b | 5 to 10°F | 41 km |
| 97702 | 6b | -5 to 0°F | 43 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 USC00357857, at 44.2842, -121.5486, elevation 969 m (3,180 ft).
- Data quality: Representative (10+ years), 20 years of freeze data.
- Average days per year at or below 32°F: 202.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Bend 7 NE (33 km)
- Redmond Roberts Field (33 km)
- Bend (33 km)
- Santiam Junction (36 km)
- Belknap Springs 8 N (39 km)
- Sunriver (45 km)
- McKenzie River Ranger Station (47 km)
- Marion Forks Fish Hatchery (48 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.