Fort Rock, OR frost dates
Last spring frostAny monthno frost-free season
Freezing nights211 / yrat or below 32°F
Hardiness zone6aZone 6a
Gardening where frost is possible all year
The weather station nearest Fort Rock, OR records freezing temperatures in every month often enough that NOAA cannot define a frost-free season. Gardening is still possible — it just means planning for frost at any time:
- Grow fast, cold-tolerant crops: Radishes, Lettuce, Spinach, Kale, Peas, Potatoes, Swiss Chard, Garlic.
- Plant once the soil can be worked — usually late spring to early summer at high elevation — and keep row covers ready for clear, still nights.
- Use season extension: cold frames, low tunnels, wall-of-water cloches or a greenhouse turn a few frost-free weeks into a real season.
- Frost-tender crops (tomatoes, squash, beans) need protection all season; choose the earliest varieties you can find.
How Fort Rock compares
- Nearby Bend, OR, 82 km away, has a regular frost season (last frost Jun 6), a reminder of how much elevation and distance from the coast matter.
About these dates
Based on 1991–2020 NOAA climate normals for the The Poplars, OR weather station, 13 km away (elevation 4,311 ft (1,314 m)).
Frost dates near Fort Rock
- Silver Lake frost any month
- Christmas Valley frost any month
- Summer Lake Jun 8 · Sep 15
- Gilchrist Jun 7 · Sep 18
- Crescent frost any month
- La Pine Jun 7 · Sep 18
- Chemult frost any month
- Brothers frost any month
- Bend (Deschutes) frost any month
- Bend Jun 6 · Sep 20
Frequently asked questions
When is the last frost in Fort Rock, OR?
Fort Rock, OR can freeze in any month, so there is no reliable last frost date. The nearest NOAA station averages 211 nights a year at or below 32°F.
What can I grow in Fort Rock, OR?
Fast, cold-tolerant crops such as radishes, lettuce, spinach, kale, peas and potatoes, ideally under row covers, cold frames or a greenhouse. Frost-tender crops like tomatoes need protection all season.