Frost dates for Alexandria Intl Airport, LA
At Alexandria Intl Airport, the median last spring frost (32°F) is Mar 2 and the median first fall frost is Nov 17, for a typical growing season of 260 days. For a 90% chance that the last frost has passed, wait until Mar 25. Nearby ZIP codes are in USDA hardiness zone 9a.
- Mar 2Last spring frost (median)50% chance of 32°F after this date
- Mar 25Safer planting date10% chance of 32°F after this date
- Nov 17First fall frost (median)50% chance of 32°F by this date
- 260 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 26 | Mar 19 | Apr 9 |
| 32°F | Feb 6 | Mar 2 | Mar 25 |
| 28°F | Jan 13 | Feb 15 | Mar 13 |
| 24°F | Dec 25 | Jan 27 | Feb 27 |
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 6 | Nov 24 |
| 32°F | Nov 1 | Nov 17 | Dec 9 |
| 28°F | Nov 8 | Dec 1 | Jan 2 |
| 24°F | Nov 25 | Dec 25 | Jan 25 |
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 | 207 days | 233 days | 261 days |
| 32°F | 231 days | 260 days | 292 days |
| 28°F | 259 days | 296 days | 334 days |
| 24°F | 296 days | 337 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 99% |
| 24°F | 82% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 71303 | 9a | 20 to 25°F | 6 km |
| 71407 | 9a | 20 to 25°F | 21 km |
| 71424 | 9a | 20 to 25°F | 22 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 USW00093915, at 31.3347, -92.5586, elevation 26 m (84 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 27.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Alexandria (9 km)
- Alexandria 5 SSE (14 km)
- Boyce 3 WNW (16 km)
- Lsu Dean Lee Rsch Station (22 km)
- Alexandria Esler Regional Airport (26 km)
- Fort Polk Fullerton Lndg Strip (44 km)
- Bunkie (55 km)
- Jena (56 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.