Frost dates for Ozark 2, AR
At Ozark 2, the median last spring frost (32°F) is Mar 30 and the median first fall frost is Nov 6, for a typical growing season of 222 days. For a 90% chance that the last frost has passed, wait until Apr 17. Nearby ZIP codes are in USDA hardiness zones 7b to 8a.
- Mar 30Last spring frost (median)50% chance of 32°F after this date
- Apr 17Safer planting date10% chance of 32°F after this date
- Nov 6First fall frost (median)50% chance of 32°F by this date
- 222 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 25 | Apr 13 | Apr 30 |
| 32°F | Mar 10 | Mar 30 | Apr 17 |
| 28°F | Feb 25 | Mar 15 | Apr 4 |
| 24°F | Feb 12 | Mar 4 | Mar 23 |
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 15 | Oct 29 | Nov 11 |
| 32°F | Oct 23 | Nov 6 | Nov 23 |
| 28°F | Nov 2 | Nov 18 | Dec 6 |
| 24°F | Nov 10 | Dec 1 | Dec 22 |
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 | 176 days | 198 days | 222 days |
| 32°F | 198 days | 222 days | 249 days |
| 28°F | 220 days | 246 days | 271 days |
| 24°F | 243 days | 269 days | 298 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 |
|---|---|---|---|
| 72949 | 7b | 5 to 10°F | 8 km |
| 72821 | 8a | 10 to 15°F | 15 km |
| 72933 | 8a | 10 to 15°F | 24 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 USC00035512, at 35.5125, -93.8683, elevation 253 m (830 ft).
- Data quality: Standard (24+ years of data), 27 years of freeze data.
- Average days per year at or below 32°F: 72.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Mountainburg 2 NE (30 km)
- Subiaco (31 km)
- Clarksville 2n (36 km)
- Winslow 7ne (40 km)
- Clarksville 6 NE (42 km)
- Booneville 3 SSE (47 km)
- Blue Mountain Dam (48 km)
- Fort Smith Regional Airport (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.