Frost dates for Blue Mountain Dam, AR
At Blue Mountain Dam, the median last spring frost (32°F) is Mar 31 and the median first fall frost is Nov 1, for a typical growing season of 215 days. For a 90% chance that the last frost has passed, wait until Apr 17. Nearby ZIP codes are in USDA hardiness zone 8a.
- Mar 31Last spring frost (median)50% chance of 32°F after this date
- Apr 17Safer planting date10% chance of 32°F after this date
- Nov 1First fall frost (median)50% chance of 32°F by this date
- 215 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 29 | Apr 12 | Apr 30 |
| 32°F | Mar 12 | Mar 31 | Apr 17 |
| 28°F | Feb 28 | Mar 17 | Apr 4 |
| 24°F | Feb 13 | Mar 5 | Mar 22 |
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 9 | Oct 23 | Nov 4 |
| 32°F | Oct 18 | Nov 1 | Nov 17 |
| 28°F | Oct 28 | Nov 12 | Dec 1 |
| 24°F | Nov 7 | Nov 26 | Dec 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 | 172 days | 192 days | 212 days |
| 32°F | 193 days | 215 days | 238 days |
| 28°F | 214 days | 238 days | 265 days |
| 24°F | 237 days | 264 days | 292 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 |
|---|---|---|---|
| 72842 | 8a | 10 to 15°F | 7 km |
| 72943 | 8a | 10 to 15°F | 14 km |
| 72833 | 8a | 10 to 15°F | 18 km |
| 72824 | 8a | 10 to 15°F | 21 km |
| 72828 | 8a | 10 to 15°F | 23 km |
| 72860 | 8a | 10 to 15°F | 25 km |
| 72838 | 8a | 10 to 15°F | 25 km |
| 72827 | 8a | 10 to 15°F | 27 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 USC00030798, at 35.1161, -93.6506, elevation 130 m (426 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 70.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Subiaco (21 km)
- Booneville 3 SSE (25 km)
- Clarksville 2n (46 km)
- Waldron (46 km)
- Dardanelle (46 km)
- Nimrod Dam (48 km)
- Ozark 2 (48 km)
- Clarksville 6 NE (51 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.