Last spring frost
Mar 28
Frost Dates for Calypso, NC
First fall frost
Nov 7
Growing season
226 days
Hardiness zone
8a
In an average year around Calypso, NC, the last spring frost (32°F) is about Mar 28 and the first fall frost is about Nov 7, giving roughly a 226-day growing season. To be safe most years, wait until Mar 10 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Apr 21 | Apr 8 | Mar 25 |
| Freeze (32°F) | Apr 10 | Mar 28 | Mar 10 |
| Hard (28°F) | Mar 31 | Mar 15 | Feb 25 |
| Severe (24°F) | Mar 20 | Feb 28 | Feb 2 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 21 | Apr 17 | Apr 13 | Apr 10 | Apr 8 | Apr 5 | Apr 2 | Mar 31 | Mar 25 |
| 32°F | Apr 10 | Apr 5 | Apr 2 | Mar 31 | Mar 28 | Mar 24 | Mar 20 | Mar 17 | Mar 10 |
| 28°F | Mar 31 | Mar 27 | Mar 21 | Mar 18 | Mar 15 | Mar 11 | Mar 6 | Mar 2 | Feb 25 |
| 24°F | Mar 20 | Mar 14 | Mar 9 | Mar 4 | Feb 28 | Feb 25 | Feb 18 | Feb 10 | Feb 2 |
| 20°F | Mar 5 | Feb 27 | Feb 18 | Feb 10 | Feb 5 | Jan 31 | Jan 27 | Jan 20 | Jan 10 |
| 16°F | Feb 17 | Feb 7 | Feb 1 | Jan 30 | Jan 26 | Jan 20 | Jan 14 | Jan 8 | Dec 31 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Oct 17 | Oct 29 | Nov 10 |
| Freeze (32°F) | Oct 27 | Nov 7 | Nov 22 |
| Hard (28°F) | Nov 4 | Nov 18 | Dec 9 |
| Severe (24°F) | Nov 14 | Dec 4 | Jan 3 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 17 | Oct 22 | Oct 25 | Oct 27 | Oct 29 | Nov 1 | Nov 2 | Nov 5 | Nov 10 |
| 32°F | Oct 27 | Oct 31 | Nov 2 | Nov 5 | Nov 7 | Nov 10 | Nov 13 | Nov 17 | Nov 22 |
| 28°F | Nov 4 | Nov 8 | Nov 12 | Nov 15 | Nov 18 | Nov 22 | Nov 27 | Dec 1 | Dec 9 |
| 24°F | Nov 14 | Nov 20 | Nov 26 | Dec 1 | Dec 4 | Dec 10 | Dec 17 | Dec 26 | Jan 3 |
| 20°F | Dec 1 | Dec 8 | Dec 15 | Dec 23 | Dec 29 | Jan 2 | Jan 7 | Jan 15 | Jan 24 |
| 16°F | Dec 15 | Dec 23 | Dec 30 | Jan 3 | Jan 9 | Jan 15 | Jan 19 | Jan 27 | Feb 2 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Mt Olive 6Se, Nc, about 6.6 miles away@if(!empty($station['elevation_ft'])), at 162 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Calypso, NC?
On average, the last spring frost (32°F) around Calypso, NC is about Mar 28. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 10.
When is the first frost in the fall?
The first fall frost around Calypso, NC typically arrives about Nov 7. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around Mar 28 on average, or Mar 10 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 226 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 28325 Planting calendar → North Carolina frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026