Frost dates for Mountainburg 2 NE, AR
At Mountainburg 2 NE, the median last spring frost (32°F) is Apr 9 and the median first fall frost is Oct 28, for a typical growing season of 201 days. For a 90% chance that the last frost has passed, wait until Apr 28. Nearby ZIP codes are in USDA hardiness zones 7b to 8a.
- Apr 9Last spring frost (median)50% chance of 32°F after this date
- Apr 28Safer planting date10% chance of 32°F after this date
- Oct 28First fall frost (median)50% chance of 32°F by this date
- 201 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 7 | Apr 23 | May 8 |
| 32°F | Mar 24 | Apr 9 | Apr 28 |
| 28°F | Mar 8 | Mar 28 | Apr 14 |
| 24°F | Feb 24 | Mar 15 | Apr 4 |
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 5 | Oct 18 | Nov 2 |
| 32°F | Oct 14 | Oct 28 | Nov 12 |
| 28°F | Oct 23 | Nov 6 | Nov 25 |
| 24°F | Nov 1 | Nov 18 | Dec 6 |
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 | 179 days | 201 days |
| 32°F | 177 days | 201 days | 225 days |
| 28°F | 202 days | 222 days | 250 days |
| 24°F | 220 days | 247 days | 273 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 |
|---|---|---|---|
| 72946 | 7b | 5 to 10°F | 2 km |
| 72934 | 7b | 5 to 10°F | 12 km |
| 72947 | 8a | 10 to 15°F | 15 km |
| 72952 | 7b | 5 to 10°F | 16 km |
| 72935 | 8a | 10 to 15°F | 17 km |
| 72932 | 7b | 5 to 10°F | 21 km |
| 72921 | 8a | 10 to 15°F | 21 km |
| 72948 | 7b | 5 to 10°F | 22 km |
| 72930 | 8a | 10 to 15°F | 24 km |
| 72955 | 7b | 5 to 10°F | 26 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 USC00035018, at 35.6494, -94.1542, elevation 242 m (793 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 87.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Winslow 7ne (26 km)
- Ozark 2 (30 km)
- Fort Smith Regional Airport (40 km)
- Fayetteville Drake Field (40 km)
- Fayetteville Exp. Station (50 km)
- Huntsville 1 SSW (59 km)
- Subiaco (61 km)
- Clarksville 2n (64 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.