The last 36°F Spring frost date is 30% likely to be on May 11. (See detailed probabilities below.)
The last 32°F light freeze date is 30% likely to be on Apr 16. (See detailed probabilities below.)
(See also 🍂 First Fall Frost Dates.)
Last frost date probabilities for Westlake, 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 | May 26 |
| 20% chance | May 16 |
| 30% chance | May 11 |
| 40% chance | May 7 |
| 50% chance | May 3 |
| 60% chance | Apr 30 |
| 70% chance | Apr 27 |
| 80% chance | Apr 22 |
| 90% chance | Apr 13 |
| Probability of light freeze (32°F) on or after… | |
|---|---|
| 10% chance | Apr 30 |
| 20% chance | Apr 24 |
| 30% chance | Apr 16 |
| 40% chance | Apr 9 |
| 50% chance | Apr 3 |
| 60% chance | Mar 29 |
| 70% chance | Mar 22 |
| 80% chance | Mar 9 |
| 90% chance | Feb 23 |
| Probability of moderate freeze (28°F) on or after… | |
|---|---|
| 10% chance | Apr 1 |
| 20% chance | Mar 18 |
| 30% chance | Mar 4 |
| 40% chance | Feb 25 |
| 50% chance | Feb 17 |
| 60% chance | Feb 9 |
| 70% chance | Jan 31 |
| 80% chance | Jan 15 |
| 90% chance | Dec 27 |
| Probability of moderate hard freeze (24°F) on or after… | |
|---|---|
| 10% chance | Feb 23 |
| 20% chance | Feb 14 |
| 30% chance | Feb 6 |
| 40% chance | Jan 29 |
| 50% chance | Jan 12 |
| 60% chance | Dec 31 |
| 70% chance | Dec 25 |
| 80% chance | Dec 16 |
| 90% chance | Dec 8 |
| Probability of hard freeze (20°F) on or after… | |
|---|---|
| 10% chance | Feb 11 |
| 20% chance | Feb 1 |
| 30% chance | Dec 30 |
| 40% chance | Dec 26 |
| 50% chance | Dec 23 |
| 60% chance | Dec 20 |
| 70% chance | Dec 16 |
| 80% chance | Dec 13 |
| 90% chance | Dec 10 |
| Probability of severe hard freeze (16°F) on or after… | |
|---|---|
| 10% chance | rarely |
| 20% chance | rarely |
| 30% chance | rarely |
| 40% chance | rarely |
| 50% chance | rarely |
| 60% chance | rarely |
| 70% chance | rarely |
| 80% chance | rarely |
| 90% chance | rarely |
Agricultural climatic data from weather station: HONEYMAN SP (USC00353995)