Frost dates for Covington 4 NNW, LA
At Covington 4 NNW, the median last spring frost (32°F) is Mar 12 and the median first fall frost is Nov 18, for a typical growing season of 253 days. For a 90% chance that the last frost has passed, wait until Apr 3. Nearby ZIP codes are in USDA hardiness zone 9a.
- Mar 12Last spring frost (median)50% chance of 32°F after this date
- Apr 3Safer planting date10% chance of 32°F after this date
- Nov 18First fall frost (median)50% chance of 32°F by this date
- 253 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 | Mar 3 | Mar 27 | Apr 15 |
| 32°F | Feb 13 | Mar 12 | Apr 3 |
| 28°F | Jan 18 | Feb 19 | Mar 17 |
| 24°F | Dec 31 | Jan 31 | Mar 4 |
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 24 | Nov 7 | Nov 25 |
| 32°F | Nov 1 | Nov 18 | Dec 12 |
| 28°F | Nov 12 | Dec 3 | Jan 6 |
| 24°F | Dec 1 | Jan 1 | 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 | 202 days | 227 days | 256 days |
| 32°F | 222 days | 253 days | 290 days |
| 28°F | 254 days | 290 days | 330 days |
| 24°F | 289 days | 330 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 | 85% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 70457 | 9a | 20 to 25°F | 0 km |
| 70435 | 9a | 20 to 25°F | 3 km |
| 70433 | 9a | 20 to 25°F | 8 km |
| 70437 | 9a | 20 to 25°F | 14 km |
| 70471 | 9a | 20 to 25°F | 14 km |
| 70447 | 9a | 20 to 25°F | 15 km |
| 70420 | 9a | 20 to 25°F | 16 km |
| 70431 | 9a | 20 to 25°F | 17 km |
| 70448 | 9a | 20 to 25°F | 20 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 USC00162151, at 30.5272, -90.1114, elevation 12 m (40 ft).
- Data quality: Representative (10+ years), 19 years of freeze data.
- Average days per year at or below 32°F: 29.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Hammond 5 E (26 km)
- Slidell Airport (34 km)
- Bogalusa (37 km)
- Slidell (44 km)
- Amite (44 km)
- New Orleans Lakefront Airport (54 km)
- New Orleans Intl Airport (61 km)
- Chalmette (65 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.