The last 36°F Spring frost date is 30% likely to be on Apr 21. (See detailed probabilities below.)
The last 32°F light freeze date is 30% likely to be on Mar 31. (See detailed probabilities below.)
(See also 🍂 First Fall Frost Dates.)
Last frost date probabilities for Congress, AZ 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 4 |
| 20% chance | Apr 27 |
| 30% chance | Apr 21 |
| 40% chance | Apr 17 |
| 50% chance | Apr 13 |
| 60% chance | Apr 9 |
| 70% chance | Apr 3 |
| 80% chance | Mar 30 |
| 90% chance | Mar 23 |
| Probability of light freeze (32°F) on or after… | |
|---|---|
| 10% chance | Apr 15 |
| 20% chance | Apr 6 |
| 30% chance | Mar 31 |
| 40% chance | Mar 26 |
| 50% chance | Mar 21 |
| 60% chance | Mar 15 |
| 70% chance | Mar 10 |
| 80% chance | Mar 5 |
| 90% chance | Feb 26 |
| Probability of moderate freeze (28°F) on or after… | |
|---|---|
| 10% chance | Mar 18 |
| 20% chance | Mar 9 |
| 30% chance | Mar 2 |
| 40% chance | Feb 26 |
| 50% chance | Feb 20 |
| 60% chance | Feb 14 |
| 70% chance | Feb 7 |
| 80% chance | Jan 31 |
| 90% chance | Jan 23 |
| Probability of moderate hard freeze (24°F) on or after… | |
|---|---|
| 10% chance | Feb 23 |
| 20% chance | Feb 11 |
| 30% chance | Feb 3 |
| 40% chance | Jan 29 |
| 50% chance | Jan 22 |
| 60% chance | Jan 14 |
| 70% chance | Jan 6 |
| 80% chance | Dec 30 |
| 90% chance | Dec 20 |
| Probability of hard freeze (20°F) on or after… | |
|---|---|
| 10% chance | Feb 4 |
| 20% chance | Jan 26 |
| 30% chance | Jan 15 |
| 40% chance | Jan 6 |
| 50% chance | Jan 1 |
| 60% chance | Dec 28 |
| 70% chance | Dec 22 |
| 80% chance | Dec 16 |
| 90% chance | Dec 8 |
| 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: WICKENBURG (USC00029287)