Frost dates for Calhoun Rsch Station, LA
At Calhoun Rsch Station, the median last spring frost (32°F) is Mar 28 and the median first fall frost is Nov 5, for a typical growing season of 224 days. For a 90% chance that the last frost has passed, wait until Apr 14. Nearby ZIP codes are in USDA hardiness zone 8b.
- Mar 28Last spring frost (median)50% chance of 32°F after this date
- Apr 14Safer planting date10% chance of 32°F after this date
- Nov 5First fall frost (median)50% chance of 32°F by this date
- 224 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 21 | Apr 8 | Apr 26 |
| 32°F | Mar 4 | Mar 28 | Apr 14 |
| 28°F | Feb 17 | Mar 10 | Apr 1 |
| 24°F | Jan 25 | Feb 23 | Mar 16 |
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 13 | Oct 26 | Nov 8 |
| 32°F | Oct 24 | Nov 5 | Nov 23 |
| 28°F | Nov 1 | Nov 18 | Dec 5 |
| 24°F | Nov 9 | Dec 1 | Jan 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 | 180 days | 200 days | 224 days |
| 32°F | 200 days | 224 days | 248 days |
| 28°F | 222 days | 250 days | 280 days |
| 24°F | 251 days | 283 days | 318 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 71225 | 8b | 15 to 20°F | 1 km |
| 71227 | 8b | 15 to 20°F | 12 km |
| 71234 | 8b | 15 to 20°F | 15 km |
| 71238 | 8b | 15 to 20°F | 17 km |
| 71292 | 8b | 15 to 20°F | 18 km |
| 71226 | 8b | 15 to 20°F | 30 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 USC00161411, at 32.5133, -92.3486, elevation 37 m (120 ft).
- Data quality: Representative (10+ years), 20 years of freeze data.
- Average days per year at or below 32°F: 57.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Ruston La Tech (28 km)
- Monroe Regional Airport (29 km)
- Farmerville (30 km)
- Monroe Delta Cc (30 km)
- Columbia Lock (45 km)
- Monroe 26 N (47 km)
- Bastrop (47 km)
- Rayville (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.