Frost dates for Calico Rock 2 WSW, AR
At Calico Rock 2 WSW, the median last spring frost (32°F) is Apr 14 and the median first fall frost is Oct 28, for a typical growing season of 196 days. For a 90% chance that the last frost has passed, wait until Apr 29. Nearby ZIP codes are in USDA hardiness zone 7b.
- Apr 14Last spring frost (median)50% chance of 32°F after this date
- Apr 29Safer planting date10% chance of 32°F after this date
- Oct 28First fall frost (median)50% chance of 32°F by this date
- 196 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 | Apr 11 | Apr 25 | May 7 |
| 32°F | Mar 30 | Apr 14 | Apr 29 |
| 28°F | Mar 15 | Apr 1 | Apr 17 |
| 24°F | Mar 3 | Mar 20 | Apr 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 2 | Oct 17 | Oct 28 |
| 32°F | Oct 12 | Oct 28 | Nov 8 |
| 28°F | Oct 24 | Nov 5 | Nov 23 |
| 24°F | Nov 2 | Nov 16 | Dec 5 |
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 | 156 days | 174 days | 192 days |
| 32°F | 176 days | 196 days | 215 days |
| 28°F | 198 days | 219 days | 244 days |
| 24°F | 219 days | 243 days | 264 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 |
|---|---|---|---|
| 72519 | 7b | 5 to 10°F | 3 km |
| 72566 | 7b | 5 to 10°F | 14 km |
| 72658 | 7b | 5 to 10°F | 15 km |
| 72528 | 7b | 5 to 10°F | 15 km |
| 72585 | 7b | 5 to 10°F | 15 km |
| 72533 | 7b | 5 to 10°F | 16 km |
| 72517 | 7b | 5 to 10°F | 19 km |
| 72556 | 7b | 5 to 10°F | 20 km |
| 72515 | 7b | 5 to 10°F | 21 km |
| 72617 | 7b | 5 to 10°F | 22 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 USC00031132, at 36.1092, -92.1636, elevation 107 m (350 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 100.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Mountain View (30 km)
- Mountain Home 1 NNW (33 km)
- Mountain Home Baxter Airport (40 km)
- Salem (42 km)
- Batesville Lvstk (45 km)
- Batesville 8 WNW (47 km)
- Evening Shade 1 NNE (49 km)
- Marshall (49 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.