Frost dates for Donaldsonville 4 SW, LA
At Donaldsonville 4 SW, the median last spring frost (32°F) is Feb 21 and the median first fall frost is Dec 5, for a typical growing season of 291 days. For a 90% chance that the last frost has passed, wait until Mar 15. 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 15Safer planting date10% chance of 32°F after this date
- Dec 5First fall frost (median)50% chance of 32°F by this date
- 291 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 10 | Mar 6 | Mar 28 |
| 32°F | Jan 23 | Feb 21 | Mar 15 |
| 28°F | Dec 31 | Feb 1 | Mar 5 |
| 24°F | Dec 26 | Jan 22 | Feb 24 |
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 3 | Nov 20 | Dec 10 |
| 32°F | Nov 14 | Dec 5 | Jan 6 |
| 28°F | Dec 1 | Dec 28 | Jan 29 |
| 24°F | Dec 9 | Jan 6 | Feb 2 |
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 | 231 days | 259 days | 291 days |
| 32°F | 257 days | 291 days | 330 days |
| 28°F | 291 days | 330 days | 365 days |
| 24°F | 323 days | 361 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 88% |
| 24°F | 55% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 70346 | 9a | 20 to 25°F | 4 km |
| 70341 | 9a | 20 to 25°F | 7 km |
| 70725 | 9a | 20 to 25°F | 8 km |
| 70393 | 9a | 20 to 25°F | 9 km |
| 70391 | 9a | 20 to 25°F | 9 km |
| 70086 | 9a | 20 to 25°F | 16 km |
| 70723 | 9a | 20 to 25°F | 18 km |
| 70390 | 9b | 25 to 30°F | 20 km |
| 70778 | 9a | 20 to 25°F | 22 km |
| 70339 | 9b | 25 to 30°F | 24 km |
| 70733 | 9a | 20 to 25°F | 33 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 USC00162534, at 30.0719, -91.0278, elevation 9 m (30 ft).
- Data quality: Standard (24+ years of data), 28 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
- Carville 2 SW (17 km)
- Lsu Ben-Hur Farm (35 km)
- Brusly 2 W (43 km)
- Thibodaux 4 SE (43 km)
- Reserve (43 km)
- Morgan City (46 km)
- Houma (52 km)
- Baton Rouge Ryan Airport (53 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.