Frost dates for Lsu Dean Lee Rsch Station, LA
At Lsu Dean Lee Rsch Station, the median last spring frost (32°F) is Mar 1 and the median first fall frost is Nov 22, for a typical growing season of 267 days. For a 90% chance that the last frost has passed, wait until Mar 22. Nearby ZIP codes are in USDA hardiness zone 9a.
- Mar 1Last spring frost (median)50% chance of 32°F after this date
- Mar 22Safer planting date10% chance of 32°F after this date
- Nov 22First fall frost (median)50% chance of 32°F by this date
- 267 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 24 | Mar 16 | Apr 6 |
| 32°F | Feb 1 | Mar 1 | Mar 22 |
| 28°F | Jan 10 | Feb 10 | Mar 9 |
| 24°F | Dec 25 | Jan 25 | Feb 25 |
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 23 | Nov 8 | Nov 29 |
| 32°F | Nov 2 | Nov 22 | Dec 13 |
| 28°F | Nov 14 | Dec 7 | Jan 11 |
| 24°F | Nov 30 | Dec 31 | 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 | 209 days | 236 days | 265 days |
| 32°F | 237 days | 267 days | 300 days |
| 28°F | 267 days | 304 days | 339 days |
| 24°F | 306 days | 342 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 97% |
| 24°F | 74% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 71302 | 9a | 20 to 25°F | 4 km |
| 71346 | 9a | 20 to 25°F | 7 km |
| 71485 | 9a | 20 to 25°F | 10 km |
| 71430 | 9a | 20 to 25°F | 17 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 USC00165630, at 31.1783, -92.4108, elevation 21 m (70 ft).
- Data quality: Representative (10+ years), 14 years of freeze data.
- Average days per year at or below 32°F: 28.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Alexandria 5 SSE (9 km)
- Alexandria (17 km)
- Alexandria Intl Airport (22 km)
- Alexandria Esler Regional Airport (26 km)
- Bunkie (33 km)
- Boyce 3 WNW (38 km)
- Elizabeth (51 km)
- Fort Polk Fullerton Lndg Strip (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.