Last spring frost
Feb 23
Frost Dates for Lyman, MS
First fall frost
Dec 3
Growing season
287 days
Hardiness zone
9a
In an average year around Lyman, MS, the last spring frost (32°F) is about Feb 23 and the first fall frost is about Dec 3, giving roughly a 287-day growing season. To be safe most years, wait until Jan 25 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) | Mar 30 | Mar 9 | Feb 16 |
| Freeze (32°F) | Mar 16 | Feb 23 | Jan 25 |
| Hard (28°F) | Mar 5 | Feb 1 | Jan 5 |
| Severe (24°F) | Feb 24 | Jan 24 | Dec 29 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 30 | Mar 23 | Mar 18 | Mar 14 | Mar 9 | Mar 5 | Feb 28 | Feb 24 | Feb 16 |
| 32°F | Mar 16 | Mar 11 | Mar 5 | Feb 28 | Feb 23 | Feb 17 | Feb 9 | Feb 3 | Jan 25 |
| 28°F | Mar 5 | Feb 25 | Feb 15 | Feb 6 | Feb 1 | Jan 28 | Jan 22 | Jan 15 | Jan 5 |
| 24°F | Feb 24 | Feb 7 | Feb 1 | Jan 28 | Jan 24 | Jan 17 | Jan 10 | Jan 4 | Dec 29 |
| 20°F | Feb 2 | Jan 29 | Jan 26 | Jan 20 | Jan 14 | Jan 11 | Jan 6 | Jan 2 | Jan 1 |
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) | Nov 3 | Nov 18 | Dec 7 |
| Freeze (32°F) | Nov 12 | Dec 3 | Jan 5 |
| Hard (28°F) | Nov 28 | Dec 31 | Jan 23 |
| Severe (24°F) | Dec 12 | Jan 7 | Feb 5 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Nov 3 | Nov 7 | Nov 12 | Nov 16 | Nov 18 | Nov 22 | Nov 26 | Dec 1 | Dec 7 |
| 32°F | Nov 12 | Nov 19 | Nov 25 | Dec 1 | Dec 3 | Dec 9 | Dec 16 | Dec 28 | Jan 5 |
| 28°F | Nov 28 | Dec 5 | Dec 13 | Dec 23 | Dec 31 | Jan 2 | Jan 7 | Jan 14 | Jan 23 |
| 24°F | Dec 12 | Dec 27 | Jan 1 | Jan 3 | Jan 7 | Jan 12 | Jan 18 | Jan 26 | Feb 5 |
| 20°F | Dec 30 | Jan 1 | Jan 3 | Jan 6 | Jan 11 | Jan 14 | Jan 21 | Jan 27 | Feb 1 |
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: Gulfport - Biloxi Ap, Ms, about 5.6 miles away@if(!empty($station['elevation_ft'])), at 42 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 Lyman, MS?
On average, the last spring frost (32°F) around Lyman, MS is about Feb 23. In cooler years it can run later, so for a safer bet many gardeners wait until Jan 25.
When is the first frost in the fall?
The first fall frost around Lyman, MS typically arrives about Dec 3. 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 Feb 23 on average, or Jan 25 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 287 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 39503 Planting calendar → Mississippi frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026