USDA Hardiness Zone 7b
Frost Dates for 21822 — Eden, Maryland
NOAA 1991–2020 normals from Salisbury, MD (10 ft), 6 miles northeast.
Updated
In Eden, the last spring frost (32°F) is around April 3 in half of years and has passed by April 25 in nine years out of ten. The first fall frost comes around November 7, as early as October 27 one year in ten, leaving a typical freeze-free season of 217 days (NOAA, Salisbury, MD).
- Last spring frost
- April 3
- First fall frost
- November 7
- Growing season
- 217 days
- Hardiness zone
- 7b
50% probability
50% probability
freeze-free, 50%
5 to 10°F (-15.0 to -12.2°C) coldest night
- First snow
- January 2
- Last snow
- March 5
- Winters with snow
- 94%
- Snow per year
- 8"
median, 1991–2020
median, 1991–2020
16 of 17 observed
NOAA normal
Frost risk by date in Eden
Half of springs at Salisbury, MD see their last 32°F night by April 3; only one in ten is past it by March 18, and one in ten still has one after April 25. Planting tender crops after April 9 leaves a 30% risk of a frost on them, after April 16 20%, and after April 25 10%. The 22 days between the even-odds date and the one-in-ten date is the widest of the 50 Maryland stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.
In fall the first 32°F night comes by November 7 in half of years, as early as October 27 one year in ten, and holds off past November 23 one year in ten. A hard freeze of 28°F follows 14 days later, around November 21; in spring the one-in-ten date for 28°F is April 6, 19 days before the 32°F one. The freeze-free season lasts 217 days in a typical year, longer than at 64% of the 50 Maryland stations; it reaches 239 days one year in ten and falls short of 194 one year in ten. On average 71 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 14 days longer, to about April 17, and return around October 27. Severe cold of 16°F or below comes in 92% of winters, usually between January 7 and February 7.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 31 | Apr 5 | Apr 9 | Apr 12 | Apr 17 | Apr 21 | Apr 24 | May 1 | May 8 |
| 32°F | Mar 18 | Mar 24 | Mar 28 | Mar 31 | Apr 3 | Apr 5 | Apr 9 | Apr 16 | Apr 25 |
| 28°F | Mar 4 | Mar 11 | Mar 15 | Mar 18 | Mar 21 | Mar 25 | Mar 29 | Mar 31 | Apr 6 |
| 24°F | Feb 20 | Feb 27 | Mar 2 | Mar 6 | Mar 10 | Mar 13 | Mar 17 | Mar 21 | Mar 27 |
| 20°F | Feb 2 | Feb 9 | Feb 16 | Feb 21 | Feb 26 | Mar 1 | Mar 5 | Mar 10 | Mar 15 |
| 16°F92% of yrs | Jan 12 | Jan 22 | Jan 30 | Feb 3 | Feb 7 | Feb 13 | Feb 19 | Feb 26 | Mar 3 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 14 | Oct 19 | Oct 22 | Oct 24 | Oct 27 | Oct 30 | Nov 1 | Nov 4 | Nov 9 |
| 32°F | Oct 27 | Oct 31 | Nov 2 | Nov 4 | Nov 7 | Nov 11 | Nov 13 | Nov 18 | Nov 23 |
| 28°F | Nov 4 | Nov 10 | Nov 13 | Nov 18 | Nov 21 | Nov 25 | Nov 28 | Dec 1 | Dec 7 |
| 24°F | Nov 18 | Nov 24 | Nov 28 | Dec 1 | Dec 5 | Dec 9 | Dec 14 | Dec 20 | Dec 27 |
| 20°F | Dec 2 | Dec 8 | Dec 15 | Dec 20 | Dec 24 | Dec 29 | Jan 2 | Jan 8 | Jan 16 |
| 16°F92% of yrs | Dec 12 | Dec 22 | Dec 28 | Jan 2 | Jan 7 | Jan 12 | Jan 17 | Jan 23 | Feb 1 |
Freeze probabilities 1991–2020 at Salisbury, MD, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 21822 →Compare Eden with another place →
Weather by month in Eden
July is the warmest month at Salisbury, MD, averaging 89°F by day and 70°F at night; January is the coldest at 47°F and 29°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 54% of years.
Warmth for growing adds up to 4,456 growing degree days a year (base 50°F), more than at 90% of the 50 Maryland stations. 36% of them (1,605) have built up by the end of June, and July adds the most, 903. Precipitation totals 48.0 inches a year, most in August (5.3") and least in February (3.2"); May to September bring 47% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 47 | 29 | 3.6 | 100% | 20 | 20 |
| Feb | 50 | 30 | 3.2 | 100% | 17 | 19 |
| Mar | 58 | 37 | 4.2 | 99% | 10 | 78 |
| Apr | 69 | 46 | 3.6 | 54% | 2 | 253 |
| May | 77 | 55 | 3.7 | 7% | <1 | 498 |
| Jun | 85 | 65 | 4.3 | 0% | 0 | 736 |
| Jul | 89 | 70 | 4.8 | 0% | 0 | 903 |
| Aug | 86 | 68 | 5.3 | 0% | 0 | 835 |
| Sep | 81 | 62 | 4.3 | 0% | 0 | 636 |
| Oct | 71 | 50 | 3.9 | 23% | 1 | 329 |
| Nov | 60 | 40 | 3.4 | 95% | 6 | 112 |
| Dec | 52 | 33 | 3.7 | 99% | 16 | 35 |
Monthly normals 1991–2020 at Salisbury, MD (10 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, Salisbury Wicomico Regional Airport, MD, 8 miles northeast of Eden, has a last frost 7 days later (April 10), a first frost 8 days earlier (October 30), a season 16 days shorter.
When it snows in Eden, Maryland
The first measurable snow (0.1 inch or more) in Eden usually arrives around January 2, and the last of the season around March 5. Those are the middle dates across the winters of 1991–2020 at Salisbury Wicomico Regional Airport, MD, 8.4 miles away: half of years saw snow earlier, half later. Snow fell in 94% of those winters. The last 32°F night of spring typically comes 29 days after the last snow.
Planting calendar for 21822
| When | What to do |
|---|---|
| January 23 – February 6 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| February 6 – February 20 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| March 6 – March 20 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| April 3 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 15 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 24 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 7 onward | Plant garlic, mulch beds, lift tender bulbsGarlic wants a cold spell; bare soil loses structure over winter. |
The weeks before and after the 50% dates are general rules of thumb, not NOAA figures; a seed packet gives the timing for each variety.
Where these figures come from
ZIP 21822 is 6 miles from Salisbury, MD, which stands at 10 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 5 other ZIP codes share the station; its figures are presented in full for 21804 (Salisbury). The 2023 USDA Plant Hardiness Zone Map lists ZIP 21822 in zone 7b, the band where the coldest night of the year averaged 5 to 10°F (-15.0 to -12.2°C) over 1991–2020; a zone describes winter lows, not frost dates.
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.