Last spring frost
Feb 10
Frost Dates for Erath, LA
First fall frost
Dec 11
Growing season
305 days
Hardiness zone
9b
In an average year around Erath, LA, the last spring frost (32°F) is about Feb 10 and the first fall frost is about Dec 11, giving roughly a 305-day growing season. To be safe most years, wait until Jan 11 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 23 | Feb 28 | Feb 2 |
| Freeze (32°F) | Mar 9 | Feb 10 | Jan 11 |
| Hard (28°F) | Feb 28 | Jan 29 | Dec 27 |
| Severe (24°F) | Feb 14 | Jan 20 | Dec 25 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 23 | Mar 16 | Mar 10 | Mar 4 | Feb 28 | Feb 25 | Feb 20 | Feb 12 | Feb 2 |
| 32°F | Mar 9 | Mar 1 | Feb 25 | Feb 18 | Feb 10 | Feb 4 | Jan 30 | Jan 24 | Jan 11 |
| 28°F | Feb 28 | Feb 18 | Feb 8 | Feb 1 | Jan 29 | Jan 23 | Jan 16 | Jan 8 | Dec 27 |
| 24°F | Feb 14 | Feb 2 | Jan 29 | Jan 25 | Jan 20 | Jan 15 | Jan 9 | Jan 3 | Dec 25 |
| 20°F | Feb 6 | Jan 30 | Jan 26 | Jan 20 | Jan 18 | Jan 14 | Jan 9 | Jan 7 | Jan 2 |
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 5 | Nov 26 | Dec 21 |
| Freeze (32°F) | Nov 17 | Dec 11 | Jan 11 |
| Hard (28°F) | Dec 1 | Jan 3 | Feb 3 |
| Severe (24°F) | Dec 21 | Jan 9 | Feb 3 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Nov 5 | Nov 11 | Nov 16 | Nov 21 | Nov 26 | Dec 1 | Dec 5 | Dec 9 | Dec 21 |
| 32°F | Nov 17 | Nov 24 | Nov 30 | Dec 6 | Dec 11 | Dec 19 | Dec 27 | Jan 2 | Jan 11 |
| 28°F | Dec 1 | Dec 13 | Dec 23 | Dec 31 | Jan 3 | Jan 7 | Jan 14 | Jan 22 | Feb 3 |
| 24°F | Dec 21 | Dec 30 | Jan 2 | Jan 6 | Jan 9 | Jan 14 | Jan 19 | Jan 26 | Feb 3 |
| 20°F | Jan 2 | Jan 5 | Jan 7 | Jan 9 | Jan 14 | Jan 18 | Jan 20 | Jan 27 | Feb 5 |
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: New Iberia Acadiana Ap, La, about 12.9 miles away@if(!empty($station['elevation_ft'])), at 24 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 Erath, LA?
On average, the last spring frost (32°F) around Erath, LA is about Feb 10. In cooler years it can run later, so for a safer bet many gardeners wait until Jan 11.
When is the first frost in the fall?
The first fall frost around Erath, LA typically arrives about Dec 11. 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 10 on average, or Jan 11 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 305 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 70533 Planting calendar → Louisiana frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026