Frost dates for Columbia Lock, LA
At Columbia Lock, the median last spring frost (32°F) is Mar 5 and the median first fall frost is Nov 22, for a typical growing season of 263 days. For a 90% chance that the last frost has passed, wait until Mar 27. Nearby ZIP codes are in USDA hardiness zone 8b.
- Mar 5Last spring frost (median)50% chance of 32°F after this date
- Mar 27Safer planting date10% chance of 32°F after this date
- Nov 22First fall frost (median)50% chance of 32°F by this date
- 263 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 28 | Mar 21 | Apr 7 |
| 32°F | Feb 14 | Mar 5 | Mar 27 |
| 28°F | Jan 20 | Feb 20 | Mar 14 |
| 24°F | Dec 31 | Feb 1 | Mar 5 |
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 10 | Nov 27 |
| 32°F | Nov 4 | Nov 22 | Dec 12 |
| 28°F | Nov 12 | Dec 4 | Jan 6 |
| 24°F | Nov 25 | Dec 29 | Jan 31 |
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 | 211 days | 235 days | 261 days |
| 32°F | 235 days | 263 days | 289 days |
| 28°F | 258 days | 292 days | 326 days |
| 24°F | 292 days | 328 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 90% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 71418 | 8b | 15 to 20°F | 6 km |
| 71415 | 8b | 15 to 20°F | 16 km |
| 71435 | 8b | 15 to 20°F | 16 km |
| 71441 | 8b | 15 to 20°F | 24 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 USC00161979, at 32.1672, -92.1078, elevation 25 m (82 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 38.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Monroe Delta Cc (37 km)
- Winnsboro 2 SE (38 km)
- Winnsboro 5 SSE (39 km)
- Monroe Regional Airport (39 km)
- Calhoun Rsch Station (45 km)
- Rayville (50 km)
- Jena (54 km)
- Winnfield 3 N (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.