Last spring frost
Mar 20
Frost Dates for Fort Johnson North, LA
First fall frost
Nov 9
Growing season
234 days
Hardiness zone
9a
In an average year around Fort Johnson North, LA, the last spring frost (32°F) is about Mar 20 and the first fall frost is about Nov 9, giving roughly a 234-day growing season. To be safe most years, wait until Feb 24 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 25 | Apr 5 | Mar 13 |
| Freeze (32°F) | Apr 12 | Mar 20 | Feb 24 |
| Hard (28°F) | Mar 27 | Feb 28 | Jan 31 |
| Severe (24°F) | Mar 10 | Feb 8 | Jan 10 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 25 | Apr 17 | Apr 13 | Apr 8 | Apr 5 | Apr 1 | Mar 27 | Mar 21 | Mar 13 |
| 32°F | Apr 12 | Apr 5 | Apr 1 | Mar 25 | Mar 20 | Mar 15 | Mar 10 | Mar 2 | Feb 24 |
| 28°F | Mar 27 | Mar 18 | Mar 11 | Mar 6 | Feb 28 | Feb 25 | Feb 20 | Feb 11 | Jan 31 |
| 24°F | Mar 10 | Mar 2 | Feb 25 | Feb 17 | Feb 8 | Feb 1 | Jan 28 | Jan 22 | Jan 10 |
| 20°F | Feb 27 | Feb 12 | Feb 4 | Jan 30 | Jan 26 | Jan 21 | Jan 15 | Jan 4 | Dec 27 |
| 16°F | Feb 10 | Jan 31 | Jan 28 | Jan 24 | Jan 18 | Jan 12 | Jan 5 | Jan 1 | Dec 24 |
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 31 | Nov 16 |
| Freeze (32°F) | Oct 26 | Nov 9 | Dec 1 |
| Hard (28°F) | Nov 3 | Nov 23 | Dec 16 |
| Severe (24°F) | Nov 15 | Dec 8 | Jan 12 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 17 | Oct 21 | Oct 25 | Oct 28 | Oct 31 | Nov 2 | Nov 5 | Nov 9 | Nov 16 |
| 32°F | Oct 26 | Oct 31 | Nov 3 | Nov 5 | Nov 9 | Nov 13 | Nov 17 | Nov 22 | Dec 1 |
| 28°F | Nov 3 | Nov 8 | Nov 14 | Nov 18 | Nov 23 | Nov 27 | Dec 1 | Dec 5 | Dec 16 |
| 24°F | Nov 15 | Nov 22 | Nov 29 | Dec 3 | Dec 8 | Dec 15 | Dec 25 | Jan 2 | Jan 12 |
| 20°F | Dec 1 | Dec 7 | Dec 18 | Dec 26 | Jan 1 | Jan 5 | Jan 10 | Jan 18 | Feb 2 |
| 16°F | Dec 17 | Dec 24 | Jan 1 | Jan 3 | Jan 6 | Jan 12 | Jan 18 | Jan 26 | 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: Leesville, La, about 8 miles away@if(!empty($station['elevation_ft'])), at 28 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 Fort Johnson North, LA?
On average, the last spring frost (32°F) around Fort Johnson North, LA is about Mar 20. In cooler years it can run later, so for a safer bet many gardeners wait until Feb 24.
When is the first frost in the fall?
The first fall frost around Fort Johnson North, LA typically arrives about Nov 9. 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 20 on average, or Feb 24 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 234 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 71475 Planting calendar → Louisiana frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026