The last 36°F Spring frost date is 30% likely to be on May 8. (See detailed probabilities below.)
The last 32°F light freeze date is 30% likely to be on Apr 20. (See detailed probabilities below.)
(See also 🍂 First Fall Frost Dates.)
Last frost date probabilities for Bonney Lake, WA are based on historical climate data.
Always check your local forecast for the most up-to-date frost warnings.
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📚 Growing Under Cover: Techniques for a More Productive, Weather-Resistant, Pest-Free Vegetable Garden
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 17 |
| 20% chance | May 12 |
| 30% chance | May 8 |
| 40% chance | May 5 |
| 50% chance | May 2 |
| 60% chance | Apr 30 |
| 70% chance | Apr 27 |
| 80% chance | Apr 24 |
| 90% chance | Apr 18 |
| Probability of light freeze (32°F) on or after… | |
|---|---|
| 10% chance | Apr 30 |
| 20% chance | Apr 25 |
| 30% chance | Apr 20 |
| 40% chance | Apr 16 |
| 50% chance | Apr 12 |
| 60% chance | Apr 8 |
| 70% chance | Apr 3 |
| 80% chance | Mar 30 |
| 90% chance | Mar 24 |
| Probability of moderate freeze (28°F) on or after… | |
|---|---|
| 10% chance | Apr 9 |
| 20% chance | Apr 1 |
| 30% chance | Mar 27 |
| 40% chance | Mar 21 |
| 50% chance | Mar 14 |
| 60% chance | Mar 6 |
| 70% chance | Feb 28 |
| 80% chance | Feb 22 |
| 90% chance | Feb 13 |
| Probability of moderate hard freeze (24°F) on or after… | |
|---|---|
| 10% chance | Mar 11 |
| 20% chance | Mar 1 |
| 30% chance | Feb 24 |
| 40% chance | Feb 19 |
| 50% chance | Feb 12 |
| 60% chance | Feb 5 |
| 70% chance | Jan 29 |
| 80% chance | Jan 13 |
| 90% chance | Jan 1 |
| Probability of hard freeze (20°F) on or after… | |
|---|---|
| 10% chance | Feb 27 |
| 20% chance | Feb 17 |
| 30% chance | Feb 9 |
| 40% chance | Feb 1 |
| 50% chance | Jan 20 |
| 60% chance | Jan 7 |
| 70% chance | Jan 1 |
| 80% chance | Dec 24 |
| 90% chance | Dec 11 |
| Probability of severe hard freeze (16°F) on or after… | |
|---|---|
| 10% chance | Feb 19 |
| 20% chance | Feb 6 |
| 30% chance | Jan 25 |
| 40% chance | Jan 12 |
| 50% chance | Jan 3 |
| 60% chance | Dec 31 |
| 70% chance | Dec 25 |
| 80% chance | Dec 16 |
| 90% chance | Dec 7 |
Agricultural climatic data from weather station: MC MILLIN RSVR (USC00455224)