The last 36°F Spring frost date is 30% likely to be on May 17. (See detailed probabilities below.)
The last 32°F light freeze date is 30% likely to be on Apr 29. (See detailed probabilities below.)
(See also 🍂 First Fall Frost Dates.)
Last frost date probabilities for Maple Valley, WA 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 31 |
| 20% chance | May 23 |
| 30% chance | May 17 |
| 40% chance | May 14 |
| 50% chance | May 10 |
| 60% chance | May 7 |
| 70% chance | May 3 |
| 80% chance | Apr 30 |
| 90% chance | Apr 25 |
| Probability of light freeze (32°F) on or after… | |
|---|---|
| 10% chance | May 8 |
| 20% chance | May 3 |
| 30% chance | Apr 29 |
| 40% chance | Apr 25 |
| 50% chance | Apr 21 |
| 60% chance | Apr 17 |
| 70% chance | Apr 12 |
| 80% chance | Apr 8 |
| 90% chance | Apr 1 |
| Probability of moderate freeze (28°F) on or after… | |
|---|---|
| 10% chance | Apr 17 |
| 20% chance | Apr 9 |
| 30% chance | Apr 3 |
| 40% chance | Mar 28 |
| 50% chance | Mar 23 |
| 60% chance | Mar 16 |
| 70% chance | Mar 8 |
| 80% chance | Feb 28 |
| 90% chance | Feb 18 |
| Probability of moderate hard freeze (24°F) on or after… | |
|---|---|
| 10% chance | Mar 14 |
| 20% chance | Mar 3 |
| 30% chance | Feb 26 |
| 40% chance | Feb 21 |
| 50% chance | Feb 15 |
| 60% chance | Feb 8 |
| 70% chance | Jan 31 |
| 80% chance | Jan 16 |
| 90% chance | Jan 2 |
| Probability of hard freeze (20°F) on or after… | |
|---|---|
| 10% chance | Feb 28 |
| 20% chance | Feb 19 |
| 30% chance | Feb 11 |
| 40% chance | Feb 3 |
| 50% chance | Jan 25 |
| 60% chance | Jan 12 |
| 70% chance | Jan 4 |
| 80% chance | Dec 29 |
| 90% chance | Dec 15 |
| Probability of severe hard freeze (16°F) on or after… | |
|---|---|
| 10% chance | Feb 23 |
| 20% chance | Feb 11 |
| 30% chance | Feb 2 |
| 40% chance | Jan 21 |
| 50% chance | Jan 10 |
| 60% chance | Jan 3 |
| 70% chance | Dec 31 |
| 80% chance | Dec 24 |
| 90% chance | Dec 13 |
Agricultural climatic data from weather station: LANDSBURG (USC00454486)