Frost dates for 21780Sabillasville, MD
The average last spring frost in Sabillasville is April 14 and the average first fall frost is October 30, giving a typical growing season of about 197 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 14
- Average first fall frost
- Oct 30
- Growing season
- 197 days
Safer after Apr 30 (1-in-10 risk)
Possible by Oct 14 (1-in-10 risk)
Last frost typically in 162 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Apr 13 · Apr 27 · May 12 | Oct 5 · Oct 20 · Nov 1 | 175 days | 100% |
| Frost / freeze (32°F) | Apr 2 · Apr 14 · Apr 30 | Oct 14 · Oct 30 · Nov 11 | 197 days | 100% |
| Hard freeze (28°F) | Mar 23 · Apr 4 · Apr 17 | Oct 25 · Nov 8 · Nov 26 | 218 days | 100% |
Planting calendar for Sabillasville
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Mar 14 – May 20 |
| Tomatoes | Transplant outdoors | Apr 30 – Jul 10 |
| Peppers | Start seeds indoors | Mar 14 – Apr 14 |
| Peppers | Transplant outdoors | May 14 – Jun 14 |
| Eggplant | Start seeds indoors | Mar 31 – Apr 29 |
| Eggplant | Transplant outdoors | May 14 – Jun 14 |
| Cucumbers | Sow outdoors | May 14 – Jul 20 |
| Summer squash | Sow outdoors | Apr 30 – Jun 14 |
| Winter squash & pumpkins | Sow outdoors | May 14 – Jun 14 |
| Snap beans | Sow outdoors | Apr 30 – Aug 12 |
| Sweet corn | Sow outdoors | Apr 30 – Jul 10 |
| Watermelon & cantaloupe | Sow outdoors | May 14 – Jun 14 |
| Okra | Sow outdoors | May 7 – May 30 |
| Peas | Sow outdoors (spring) | Mar 14 – Apr 29 |
| Potatoes | Plant outdoors (spring) | Mar 14 – May 14 |
| Onions | Start seeds indoors (spring) | Jan 31 – Feb 27 |
| Onions | Transplant outdoors (spring) | Mar 31 – Apr 29 |
| Broccoli | Start seeds indoors (spring) | Feb 24 – Mar 30 |
| Broccoli | Transplant outdoors (spring) | Mar 31 – Apr 29 |
| Broccoli | Start seeds indoors (fall) | Jun 30 – Jul 10 |
| Broccoli | Transplant outdoors (fall) | Jul 30 – Aug 10 |
| Cabbage | Start seeds indoors (spring) | Feb 14 – Mar 14 |
| Cabbage | Transplant outdoors (spring) | Mar 14 – Apr 14 |
| Cabbage | Start seeds indoors (fall) | Jun 20 – Jul 20 |
| Cabbage | Transplant outdoors (fall) | Jul 20 – Aug 20 |
| Leaf lettuce | Sow outdoors (spring) | Mar 14 – May 30 |
| Leaf lettuce | Sow outdoors (fall) | Jul 20 – Sep 5 |
| Spinach | Sow outdoors (spring) | Mar 7 – Apr 20 |
| Spinach | Sow outdoors (fall) | Aug 6 – Sep 10 |
| Radishes | Sow outdoors (spring) | Mar 14 – May 4 |
| Radishes | Sow outdoors (fall) | Jul 20 – Sep 20 |
| Kale | Sow outdoors (spring) | Mar 31 – Apr 20 |
| Kale | Sow outdoors (fall) | Jul 13 – Aug 20 |
| Carrots | Sow outdoors (spring) | Apr 14 – May 30 |
| Carrots | Sow outdoors (fall) | Jun 20 – Aug 5 |
| Garlic | Plant outdoors (fall) | Oct 20 – Nov 20 |
Where these dates come from
ZIP code 21780 is matched to the NOAA station Catoctin Mtn Park, MD, 4.3 km away, at 1,610 ft elevation (494 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Catoctin Mtn Park, MD (used) | 1,610 ft | Apr 14 | Oct 30 |
| Smithsburg 2Nw, MD | 670 ft | Apr 25 | Oct 19 |
| Emmitsburg 2 Se, MD | 403 ft | Apr 22 | Oct 20 |
| S Mtn, PA | 1,520 ft | Apr 27 | Oct 20 |
Frost dates near Sabillasville
- Cascade, MD 21719 · last Apr 14, first Oct 30
- Blue Ridge Summit, PA 17214 · last Apr 27, first Oct 20
- Rouzerville, PA 17250 · last Apr 7, first Nov 4
- Smithsburg, MD 21783 · last Apr 7, first Nov 4
- Thurmont, MD 21788 · last Apr 22, first Oct 20
- Cavetown, MD 21720 · last Apr 7, first Nov 4
- Emmitsburg, MD 21727 · last Apr 22, first Oct 20
- Waynesboro, PA 17268 · last Apr 7, first Nov 4
Frequently asked questions
- When is the last frost in Sabillasville, MD?
- For ZIP code 21780, the average last spring frost (32°F) is April 14, based on NOAA 1991-2020 climate normals for the Catoctin Mtn Park, MD weather station. There is a 1-in-10 chance of a frost after April 30.
- When is the first frost in Sabillasville, MD?
- The average first fall frost (32°F) is October 30. There is a 1-in-10 chance of frost by October 14, so tender plants are at risk from that point on.
- How long is the growing season in 21780?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 197 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.