Frost dates for Arkansas Post, AR
At Arkansas Post, the median last spring frost (32°F) is Mar 10 and the median first fall frost is Nov 18, for a typical growing season of 251 days. For a 90% chance that the last frost has passed, wait until Mar 28. Nearby ZIP codes are in USDA hardiness zone 8b.
- Mar 10Last spring frost (median)50% chance of 32°F after this date
- Mar 28Safer planting date10% chance of 32°F after this date
- Nov 18First fall frost (median)50% chance of 32°F by this date
- 251 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 4 | Mar 23 | Apr 9 |
| 32°F | Feb 20 | Mar 10 | Mar 28 |
| 28°F | Feb 1 | Feb 28 | Mar 15 |
| 24°F | Jan 13 | Feb 11 | Mar 7 |
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 2 | Nov 18 | Dec 8 |
| 28°F | Nov 11 | Dec 2 | Dec 25 |
| 24°F | Nov 24 | Dec 24 | Jan 17 |
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 | 205 days | 229 days | 255 days |
| 32°F | 228 days | 251 days | 280 days |
| 28°F | 252 days | 278 days | 309 days |
| 24°F | 276 days | 312 days | 342 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 98% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 72055 | 8b | 15 to 20°F | 8 km |
| 72166 | 8b | 15 to 20°F | 12 km |
| 72133 | 8b | 15 to 20°F | 15 km |
| 72328 | 8b | 15 to 20°F | 22 km |
| 72379 | 8b | 15 to 20°F | 28 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 USC00030240, at 34.0250, -91.3444, elevation 59 m (194 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 40.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Dumas (23 km)
- Rohwer 2 NNE (25 km)
- Cane Creek State Park (41 km)
- Saint Charles (43 km)
- Stuttgart 9 ESE (50 km)
- Dermott 3 NE (52 km)
- Pine Bluff Grider Field (57 km)
- Monticello Muni Airport (58 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.