Frost dates for 97712Brothers, OR
Frost is possible in any month near Brothers, based on NOAA 1991-2020 records for the Brothers, OR station.
Frost is possible in any month. Even summer nights can drop to freezing at this station, so protect tender plants whenever cold nights are forecast.
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | — | — | 36 days | 100% |
| Frost / freeze (32°F) | — | — | 60 days | 100% |
| Hard freeze (28°F) | — | — | 90 days | 100% |
Where these dates come from
ZIP code 97712 is matched to the NOAA station Brothers, OR, 10.4 km away, at 4,640 ft elevation (24 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Brothers, OR (used) | 4,640 ft | — | — |
| Barnes Stn, OR | 3,970 ft | Jun 2 | Sep 17 |
| Paulina, OR | 3,684 ft | — | — |
| Prineville, OR | 2,876 ft | Jun 1 | Sep 22 |
Frost dates near Brothers
- Post, OR 97752 · last Jun 2, first Sep 17
- Christmas Valley, OR 97641 · last —, first —
- Riley, OR 97758 · last Jun 11, first Sep 28
- Prineville, OR 97754 · last Jun 1, first Sep 22
- Fort Rock, OR 97735 · last —, first —
- Powell Butte, OR 97753 · last Jun 9, first Sep 14
- Bend, OR 97702 · last Jun 6, first Sep 20
- Paulina, OR 97751 · last Jun 2, first Sep 17
Frequently asked questions
- When is the last frost in Brothers, OR?
- Frost is possible in any month at the nearest NOAA station (Brothers, OR), so there is no reliable average last frost date.
- When is the first frost in Brothers, OR?
- Frost is possible in any month at the nearest NOAA station.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.