A 36°F frost is always a risk here. (See detailed probabilities below.)
The last 32°F light freeze date is 30% likely to be on May 18. (See detailed probabilities below.)
(See also 🍂 First Fall Frost Dates.)
Last frost date probabilities for Timber, OR are based on historical climate data.
Always check your local forecast for the most up-to-date frost warnings.
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The last spring frost signals when your area is safe from freezing temperatures. Tender plants can now grow outdoors without cold damage! This marks the beginning of the growing season. Last spring frost serves as your essential starting point for planting warm-season crops. It's also time to remove winter protection from your perennials. Enjoy the longer days and warmer weather!
Start seeds indoors several weeks before your last frost date. This gives plants time to reach transplanting size when weather permits. Plan your outdoor planting schedule around your area's average last frost date. Plant some crops before and some after this date to protect against weather changes. Look for spots in your yard where frost stays longer or disappears earlier. Create your own frost map to use all available growing space and extend your season. Keep watching your local weather forecast to catch any surprise late frosts.
| Probability of frost (36°F) on or after… | |
|---|---|
| 10% chance | always |
| 20% chance | always |
| 30% chance | always |
| 40% chance | always |
| 50% chance | always |
| 60% chance | always |
| 70% chance | always |
| 80% chance | always |
| 90% chance | always |
| Probability of light freeze (32°F) on or after… | |
|---|---|
| 10% chance | May 30 |
| 20% chance | May 23 |
| 30% chance | May 18 |
| 40% chance | May 13 |
| 50% chance | May 9 |
| 60% chance | May 4 |
| 70% chance | Apr 30 |
| 80% chance | Apr 27 |
| 90% chance | Apr 20 |
| Probability of moderate freeze (28°F) on or after… | |
|---|---|
| 10% chance | May 3 |
| 20% chance | Apr 28 |
| 30% chance | Apr 21 |
| 40% chance | Apr 15 |
| 50% chance | Apr 9 |
| 60% chance | Apr 4 |
| 70% chance | Mar 31 |
| 80% chance | Mar 24 |
| 90% chance | Mar 15 |
| Probability of moderate hard freeze (24°F) on or after… | |
|---|---|
| 10% chance | Apr 2 |
| 20% chance | Mar 26 |
| 30% chance | Mar 17 |
| 40% chance | Mar 10 |
| 50% chance | Mar 3 |
| 60% chance | Feb 28 |
| 70% chance | Feb 22 |
| 80% chance | Feb 15 |
| 90% chance | Feb 3 |
| Probability of hard freeze (20°F) on or after… | |
|---|---|
| 10% chance | Mar 4 |
| 20% chance | Feb 27 |
| 30% chance | Feb 21 |
| 40% chance | Feb 16 |
| 50% chance | Feb 11 |
| 60% chance | Feb 4 |
| 70% chance | Jan 29 |
| 80% chance | Jan 12 |
| 90% chance | Dec 31 |
| Probability of severe hard freeze (16°F) on or after… | |
|---|---|
| 10% chance | Feb 22 |
| 20% chance | Feb 16 |
| 30% chance | Feb 9 |
| 40% chance | Feb 3 |
| 50% chance | Jan 28 |
| 60% chance | Jan 14 |
| 70% chance | Jan 4 |
| 80% chance | Dec 28 |
| 90% chance | Dec 9 |
Agricultural climatic data from weather station: VERNONIA NO 2 (USC00358884)