Frost dates for Lsu Ben-Hur Farm, LA
At Lsu Ben-Hur Farm, the median last spring frost (32°F) is Feb 28 and the median first fall frost is Nov 26, for a typical growing season of 272 days. For a 90% chance that the last frost has passed, wait until Mar 21. Nearby ZIP codes are in USDA hardiness zone 9a.
- Feb 28Last spring frost (median)50% chance of 32°F after this date
- Mar 21Safer planting date10% chance of 32°F after this date
- Nov 26First fall frost (median)50% chance of 32°F by this date
- 272 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 21 | Mar 16 | Apr 5 |
| 32°F | Jan 31 | Feb 28 | Mar 21 |
| 28°F | Jan 7 | Feb 7 | Mar 10 |
| 24°F | Dec 24 | Jan 24 | Feb 26 |
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 | Oct 29 | Nov 12 | Dec 1 |
| 32°F | Nov 6 | Nov 26 | Dec 22 |
| 28°F | Nov 20 | Dec 16 | Jan 16 |
| 24°F | Dec 5 | Jan 2 | 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 | 212 days | 242 days | 272 days |
| 32°F | 240 days | 272 days | 309 days |
| 28°F | 273 days | 309 days | 347 days |
| 24°F | 309 days | 349 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 96% |
| 24°F | 70% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 70820 | 9a | 20 to 25°F | 3 km |
| 70808 | 9a | 20 to 25°F | 5 km |
| 70810 | 9a | 20 to 25°F | 7 km |
| 70780 | 9a | 20 to 25°F | 8 km |
| 70836 | 9a | 20 to 25°F | 8 km |
| 70802 | 9a | 20 to 25°F | 9 km |
| 70801 | 9a | 20 to 25°F | 10 km |
| 70809 | 9a | 20 to 25°F | 10 km |
| 70825 | 9a | 20 to 25°F | 10 km |
| 70816 | 9a | 20 to 25°F | 15 km |
| 70817 | 9a | 20 to 25°F | 18 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 USC00165620, at 30.3644, -91.1672, elevation 6 m (21 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 20.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Brusly 2 W (10 km)
- Carville 2 SW (19 km)
- Baton Rouge Ryan Airport (19 km)
- Donaldsonville 4 SW (35 km)
- New Roads 5 NE (45 km)
- St. Francisville 1 NE (51 km)
- Clinton 5 SE (54 km)
- Reserve (66 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.