Frost dates for Grand Coteau, LA
At Grand Coteau, the median last spring frost (32°F) is Feb 28 and the median first fall frost is Nov 23, for a typical growing season of 267 days. For a 90% chance that the last frost has passed, wait until Mar 25. Nearby ZIP codes are in USDA hardiness zone 9a.
- Feb 28Last spring frost (median)50% chance of 32°F after this date
- Mar 25Safer planting date10% chance of 32°F after this date
- Nov 23First 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 18 | Apr 7 |
| 32°F | Jan 31 | Feb 28 | Mar 25 |
| 28°F | Jan 5 | Feb 6 | Mar 8 |
| 24°F | Dec 22 | 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 30 | Nov 13 | Dec 1 |
| 32°F | Nov 5 | Nov 23 | Dec 16 |
| 28°F | Nov 14 | Dec 8 | Jan 11 |
| 24°F | Dec 2 | Dec 30 | 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 | 212 days | 239 days | 266 days |
| 32°F | 237 days | 267 days | 301 days |
| 28°F | 265 days | 302 days | 339 days |
| 24°F | 301 days | 337 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 | 75% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 70541 | 9a | 20 to 25°F | 0 km |
| 70584 | 9a | 20 to 25°F | 7 km |
| 70551 | 9a | 20 to 25°F | 8 km |
| 70520 | 9a | 20 to 25°F | 10 km |
| 70512 | 9a | 20 to 25°F | 12 km |
| 70570 | 9a | 20 to 25°F | 14 km |
| 70525 | 9a | 20 to 25°F | 17 km |
| 70550 | 9a | 20 to 25°F | 18 km |
| 70577 | 9a | 20 to 25°F | 19 km |
| 70750 | 9a | 20 to 25°F | 25 km |
| 70589 | 9a | 20 to 25°F | 30 km |
| 71353 | 9a | 20 to 25°F | 34 km |
| 71358 | 9a | 20 to 25°F | 38 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 USC00163800, at 30.4183, -92.0442, elevation 17 m (55 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 18.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Lafayette (22 km)
- Lafayette Regional Airport (24 km)
- Crowley 2 NE (35 km)
- Eunice (38 km)
- Lafayette 13 SE (40 km)
- St. Martinville 3 SW (41 km)
- New Iberia Acadiana Airport (45 km)
- New Iberia Acadiana Regional Airport (45 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.