The last 36°F Spring frost date is 30% likely to be on Jun 5. (See detailed probabilities below.)
The last 32°F light freeze date is 30% likely to be on May 23. (See detailed probabilities below.)
(See also 🍂 First Fall Frost Dates.)
Last frost date probabilities for Williams, AZ 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 | Jun 14 |
| 20% chance | Jun 9 |
| 30% chance | Jun 5 |
| 40% chance | Jun 2 |
| 50% chance | May 30 |
| 60% chance | May 26 |
| 70% chance | May 22 |
| 80% chance | May 17 |
| 90% chance | May 10 |
| Probability of light freeze (32°F) on or after… | |
|---|---|
| 10% chance | Jun 4 |
| 20% chance | May 29 |
| 30% chance | May 23 |
| 40% chance | May 18 |
| 50% chance | May 14 |
| 60% chance | May 10 |
| 70% chance | May 7 |
| 80% chance | May 3 |
| 90% chance | Apr 30 |
| Probability of moderate freeze (28°F) on or after… | |
|---|---|
| 10% chance | May 18 |
| 20% chance | May 12 |
| 30% chance | May 8 |
| 40% chance | May 4 |
| 50% chance | May 2 |
| 60% chance | Apr 29 |
| 70% chance | Apr 25 |
| 80% chance | Apr 21 |
| 90% chance | Apr 14 |
| Probability of moderate hard freeze (24°F) on or after… | |
|---|---|
| 10% chance | May 5 |
| 20% chance | Apr 30 |
| 30% chance | Apr 25 |
| 40% chance | Apr 21 |
| 50% chance | Apr 17 |
| 60% chance | Apr 12 |
| 70% chance | Apr 8 |
| 80% chance | Apr 3 |
| 90% chance | Mar 28 |
| Probability of hard freeze (20°F) on or after… | |
|---|---|
| 10% chance | Apr 21 |
| 20% chance | Apr 13 |
| 30% chance | Apr 7 |
| 40% chance | Apr 3 |
| 50% chance | Mar 30 |
| 60% chance | Mar 25 |
| 70% chance | Mar 20 |
| 80% chance | Mar 14 |
| 90% chance | Mar 7 |
| Probability of severe hard freeze (16°F) on or after… | |
|---|---|
| 10% chance | Apr 3 |
| 20% chance | Mar 27 |
| 30% chance | Mar 21 |
| 40% chance | Mar 16 |
| 50% chance | Mar 11 |
| 60% chance | Mar 7 |
| 70% chance | Mar 1 |
| 80% chance | Feb 23 |
| 90% chance | Feb 13 |
Agricultural climatic data from weather station: WILLIAMS (USC00029359)