Frost dates for Dumas, AR
At Dumas, the median last spring frost (32°F) is Mar 12 and the median first fall frost is Nov 14, for a typical growing season of 245 days. For a 90% chance that the last frost has passed, wait until Mar 29. Nearby ZIP codes are in USDA hardiness zone 8b.
- Mar 12Last spring frost (median)50% chance of 32°F after this date
- Mar 29Safer planting date10% chance of 32°F after this date
- Nov 14First fall frost (median)50% chance of 32°F by this date
- 245 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 8 | Mar 25 | Apr 10 |
| 32°F | Feb 24 | Mar 12 | Mar 29 |
| 28°F | Feb 3 | Mar 2 | Mar 19 |
| 24°F | Jan 13 | Feb 15 | Mar 10 |
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 20 | Nov 3 | Nov 18 |
| 32°F | Oct 30 | Nov 14 | Dec 2 |
| 28°F | Nov 8 | Nov 27 | Dec 20 |
| 24°F | Nov 21 | Dec 19 | Jan 20 |
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 | 200 days | 222 days | 242 days |
| 32°F | 223 days | 245 days | 268 days |
| 28°F | 246 days | 271 days | 304 days |
| 24°F | 273 days | 308 days | 340 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 99% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 71639 | 8b | 15 to 20°F | 1 km |
| 71662 | 8b | 15 to 20°F | 9 km |
| 71677 | 8b | 15 to 20°F | 15 km |
| 71643 | 8b | 15 to 20°F | 15 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 USC00032148, at 33.8886, -91.5317, elevation 50 m (163 ft).
- Data quality: Representative (10+ years), 19 years of freeze data.
- Average days per year at or below 32°F: 42.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Cane Creek State Park (22 km)
- Arkansas Post (23 km)
- Rohwer 2 NNE (25 km)
- Monticello Muni Airport (35 km)
- Dermott 3 NE (39 km)
- Pine Bluff Grider Field (49 km)
- Pine Bluff (58 km)
- Warren 2 WSW (61 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.