The last 36°F Spring frost date is 30% likely to be on Apr 13. (See detailed probabilities below.)
The last 32°F light freeze date is 30% likely to be on Mar 29. (See detailed probabilities below.)
(See also 🍂 First Fall Frost Dates.)
Last frost date probabilities for Tombstone, 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 | Apr 26 |
| 20% chance | Apr 19 |
| 30% chance | Apr 13 |
| 40% chance | Apr 9 |
| 50% chance | Apr 6 |
| 60% chance | Apr 3 |
| 70% chance | Mar 31 |
| 80% chance | Mar 26 |
| 90% chance | Mar 20 |
| Probability of light freeze (32°F) on or after… | |
|---|---|
| 10% chance | Apr 8 |
| 20% chance | Apr 1 |
| 30% chance | Mar 29 |
| 40% chance | Mar 23 |
| 50% chance | Mar 19 |
| 60% chance | Mar 15 |
| 70% chance | Mar 10 |
| 80% chance | Mar 3 |
| 90% chance | Feb 21 |
| Probability of moderate freeze (28°F) on or after… | |
|---|---|
| 10% chance | Mar 21 |
| 20% chance | Mar 12 |
| 30% chance | Mar 5 |
| 40% chance | Feb 25 |
| 50% chance | Feb 17 |
| 60% chance | Feb 10 |
| 70% chance | Feb 3 |
| 80% chance | Jan 28 |
| 90% chance | Jan 17 |
| Probability of moderate hard freeze (24°F) on or after… | |
|---|---|
| 10% chance | Feb 25 |
| 20% chance | Feb 11 |
| 30% chance | Feb 3 |
| 40% chance | Jan 28 |
| 50% chance | Jan 20 |
| 60% chance | Jan 12 |
| 70% chance | Jan 6 |
| 80% chance | Dec 30 |
| 90% chance | Dec 19 |
| Probability of hard freeze (20°F) on or after… | |
|---|---|
| 10% chance | Feb 4 |
| 20% chance | Jan 26 |
| 30% chance | Jan 16 |
| 40% chance | Jan 8 |
| 50% chance | Jan 4 |
| 60% chance | Dec 31 |
| 70% chance | Dec 28 |
| 80% chance | Dec 23 |
| 90% chance | Dec 14 |
| 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: TOMBSTONE (USC00028619)