Frost dates for St. Martinville 3 SW, LA
At St. Martinville 3 SW, the median last spring frost (32°F) is Feb 21 and the median first fall frost is Nov 27, for a typical growing season of 280 days. For a 90% chance that the last frost has passed, wait until Mar 17. Nearby ZIP codes are in USDA hardiness zones 9a to 9b.
- Feb 21Last spring frost (median)50% chance of 32°F after this date
- Mar 17Safer planting date10% chance of 32°F after this date
- Nov 27First fall frost (median)50% chance of 32°F by this date
- 280 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Feb 13 | Mar 7 | Apr 1 |
| 32°F | Jan 22 | Feb 21 | Mar 17 |
| 28°F | Dec 30 | Feb 1 | Mar 4 |
| 24°F | Dec 18 | Jan 19 | Feb 20 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Nov 1 | Nov 14 | Dec 4 |
| 32°F | Nov 9 | Nov 27 | Dec 28 |
| 28°F | Nov 18 | Dec 14 | Jan 21 |
| 24°F | Dec 4 | Jan 2 | Feb 1 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 223 days | 252 days | 285 days |
| 32°F | 248 days | 280 days | 319 days |
| 28°F | 277 days | 319 days | 358 days |
| 24°F | 317 days | 354 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 95% |
| 24°F | 62% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 70519 | 9a | 20 to 25°F | 4 km |
| 70518 | 9a | 20 to 25°F | 8 km |
| 70582 | 9a | 20 to 25°F | 13 km |
| 70592 | 9a | 20 to 25°F | 14 km |
| 70563 | 9a | 20 to 25°F | 15 km |
| 70560 | 9b | 25 to 30°F | 17 km |
| 70508 | 9a | 20 to 25°F | 17 km |
| 70558 | 9a | 20 to 25°F | 20 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00168181, at 30.0858, -91.8694, elevation 9 m (30 ft).
- Data quality: Representative (10+ years), 16 years of freeze data.
- Average days per year at or below 32°F: 16.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Lafayette 13 SE (1 km)
- New Iberia Acadiana Airport (6 km)
- New Iberia Acadiana Regional Airport (6 km)
- Lafayette Regional Airport (17 km)
- Jeanerette 5 NW (21 km)
- Lafayette (24 km)
- Grand Coteau (41 km)
- Franklin 3 NW (43 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.