Frost dates for 21679Wye Mills, MD
The average last spring frost in Wye Mills is April 1 and the average first fall frost is November 7, giving a typical growing season of about 220 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 1
- Average first fall frost
- Nov 7
- Growing season
- 220 days
Safer after Apr 15 (1-in-10 risk)
Possible by Oct 24 (1-in-10 risk)
First frost typically in 4 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) | Mar 31 · Apr 15 · May 3 | Oct 11 · Oct 29 · Nov 10 | 196 days | 100% |
| Frost / freeze (32°F) | Mar 18 · Apr 1 · Apr 15 | Oct 24 · Nov 7 · Nov 23 | 220 days | 100% |
| Hard freeze (28°F) | Mar 3 · Mar 20 · Apr 1 | Nov 5 · Nov 20 · Dec 9 | 246 days | 100% |
Planting calendar for Wye Mills
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 1 – May 7 |
| Tomatoes | Transplant outdoors | Apr 17 – Jul 18 |
| Peppers | Start seeds indoors | Mar 1 – Apr 1 |
| Peppers | Transplant outdoors | May 1 – Jun 1 |
| Eggplant | Start seeds indoors | Mar 18 – Apr 16 |
| Eggplant | Transplant outdoors | May 1 – Jun 1 |
| Cucumbers | Sow outdoors | May 1 – Jul 28 |
| Summer squash | Sow outdoors | Apr 17 – Jun 1 |
| Winter squash & pumpkins | Sow outdoors | May 1 – Jun 1 |
| Snap beans | Sow outdoors | Apr 17 – Aug 20 |
| Sweet corn | Sow outdoors | Apr 17 – Jul 18 |
| Watermelon & cantaloupe | Sow outdoors | May 1 – Jun 1 |
| Okra | Sow outdoors | Apr 24 – May 17 |
| Peas | Sow outdoors (spring) | Mar 1 – Apr 16 |
| Potatoes | Plant outdoors (spring) | Mar 1 – May 1 |
| Onions | Start seeds indoors (spring) | Jan 18 – Feb 14 |
| Onions | Transplant outdoors (spring) | Mar 18 – Apr 16 |
| Broccoli | Start seeds indoors (spring) | Feb 11 – Mar 17 |
| Broccoli | Transplant outdoors (spring) | Mar 18 – Apr 16 |
| Broccoli | Start seeds indoors (fall) | Jul 8 – Jul 18 |
| Broccoli | Transplant outdoors (fall) | Aug 7 – Aug 18 |
| Cabbage | Start seeds indoors (spring) | Feb 1 – Mar 1 |
| Cabbage | Transplant outdoors (spring) | Mar 1 – Apr 1 |
| Cabbage | Start seeds indoors (fall) | Jun 28 – Jul 28 |
| Cabbage | Transplant outdoors (fall) | Jul 28 – Aug 28 |
| Leaf lettuce | Sow outdoors (spring) | Mar 1 – May 17 |
| Leaf lettuce | Sow outdoors (fall) | Jul 28 – Sep 13 |
| Spinach | Sow outdoors (spring) | Feb 22 – Apr 7 |
| Spinach | Sow outdoors (fall) | Aug 14 – Sep 18 |
| Radishes | Sow outdoors (spring) | Mar 1 – Apr 21 |
| Radishes | Sow outdoors (fall) | Jul 28 – Sep 28 |
| Kale | Sow outdoors (spring) | Mar 18 – Apr 7 |
| Kale | Sow outdoors (fall) | Jul 21 – Aug 28 |
| Carrots | Sow outdoors (spring) | Apr 1 – May 17 |
| Carrots | Sow outdoors (fall) | Jun 28 – Aug 13 |
| Garlic | Plant outdoors (fall) | Oct 28 – Nov 28 |
Where these dates come from
ZIP code 21679 is matched to the NOAA station Royal Oak 2 Ssw, MD, 25.5 km away, at 10 ft elevation (43 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Royal Oak 2 Ssw, MD (used) | 10 ft | Apr 1 | Nov 7 |
| Stevensville 2Sw, MD | 10 ft | Mar 29 | Nov 12 |
| Chestertown, MD | 40 ft | Apr 3 | Nov 5 |
| Annapolis Naf, MD | 8 ft | Mar 23 | Nov 20 |
Frost dates near Wye Mills
- Queen Anne, MD 21657 · last Apr 3, first Nov 5
- Cordova, MD 21625 · last Apr 1, first Nov 7
- Queenstown, MD 21658 · last Apr 3, first Nov 5
- Grasonville, MD 21638 · last Apr 1, first Nov 7
- Price, MD 21656 · last Apr 3, first Nov 5
- Chestertown, MD 21690 · last Apr 3, first Nov 5
- Hillsboro, MD 21641 · last Apr 1, first Nov 7
- Centreville, MD 21617 · last Apr 3, first Nov 5
Frequently asked questions
- When is the last frost in Wye Mills, MD?
- For ZIP code 21679, the average last spring frost (32°F) is April 1, based on NOAA 1991-2020 climate normals for the Royal Oak 2 Ssw, MD weather station. There is a 1-in-10 chance of a frost after April 15.
- When is the first frost in Wye Mills, MD?
- The average first fall frost (32°F) is November 7. There is a 1-in-10 chance of frost by October 24, so tender plants are at risk from that point on.
- How long is the growing season in 21679?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 220 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.