🌷 2026 Last Frost Dates for Greenbelt, Maryland 20770
The last 36°F Spring frost date is 30% likely to be on May 1. (See detailed probabilities below.)
The last 32°F light freeze date is 30% likely to be on Apr 18. (See detailed probabilities below.)
(See also 🍂 First Fall Frost Dates.)
Last frost date probabilities for Greenbelt, MD are based on historical climate data.
Always check your local forecast for the most up-to-date frost warnings.
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What is a Last Frost Date?
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!
How to use the Last Frost Date?
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.
Last Frost Date Probabilities
| Probability of frost (36°F) on or after… | |
|---|---|
| 10% chance | May 11 |
| 20% chance | May 6 |
| 30% chance | May 1 |
| 40% chance | Apr 28 |
| 50% chance | Apr 24 |
| 60% chance | Apr 21 |
| 70% chance | Apr 18 |
| 80% chance | Apr 15 |
| 90% chance | Apr 10 |
| Probability of light freeze (32°F) on or after… | |
|---|---|
| 10% chance | May 1 |
| 20% chance | Apr 21 |
| 30% chance | Apr 18 |
| 40% chance | Apr 14 |
| 50% chance | Apr 10 |
| 60% chance | Apr 7 |
| 70% chance | Apr 3 |
| 80% chance | Mar 31 |
| 90% chance | Mar 27 |
| Probability of moderate freeze (28°F) on or after… | |
|---|---|
| 10% chance | Apr 10 |
| 20% chance | Apr 5 |
| 30% chance | Apr 2 |
| 40% chance | Mar 31 |
| 50% chance | Mar 29 |
| 60% chance | Mar 26 |
| 70% chance | Mar 22 |
| 80% chance | Mar 17 |
| 90% chance | Mar 12 |
| Probability of moderate hard freeze (24°F) on or after… | |
|---|---|
| 10% chance | Mar 31 |
| 20% chance | Mar 27 |
| 30% chance | Mar 22 |
| 40% chance | Mar 19 |
| 50% chance | Mar 16 |
| 60% chance | Mar 12 |
| 70% chance | Mar 9 |
| 80% chance | Mar 5 |
| 90% chance | Feb 27 |
| Probability of hard freeze (20°F) on or after… | |
|---|---|
| 10% chance | Mar 21 |
| 20% chance | Mar 16 |
| 30% chance | Mar 12 |
| 40% chance | Mar 8 |
| 50% chance | Mar 5 |
| 60% chance | Mar 1 |
| 70% chance | Feb 25 |
| 80% chance | Feb 19 |
| 90% chance | Feb 10 |
| Probability of severe hard freeze (16°F) on or after… | |
|---|---|
| 10% chance | Mar 12 |
| 20% chance | Mar 6 |
| 30% chance | Feb 28 |
| 40% chance | Feb 25 |
| 50% chance | Feb 20 |
| 60% chance | Feb 14 |
| 70% chance | Feb 8 |
| 80% chance | Feb 2 |
| 90% chance | Jan 26 |
Agricultural climatic data from weather station: BELTSVILLE (USC00180700:frost)