Frost dates for Keo, AR
At Keo, the median last spring frost (32°F) is Mar 21 and the median first fall frost is Nov 9, for a typical growing season of 235 days. For a 90% chance that the last frost has passed, wait until Apr 6. Nearby ZIP codes are in USDA hardiness zones 8a to 8b.
- Mar 21Last spring frost (median)50% chance of 32°F after this date
- Apr 6Safer planting date10% chance of 32°F after this date
- Nov 9First fall frost (median)50% chance of 32°F by this date
- 235 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 16 | Apr 2 | Apr 18 |
| 32°F | Mar 2 | Mar 21 | Apr 6 |
| 28°F | Feb 18 | Mar 8 | Mar 26 |
| 24°F | Jan 31 | Feb 26 | Mar 16 |
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 18 | Oct 30 | Nov 12 |
| 32°F | Oct 27 | Nov 9 | Nov 26 |
| 28°F | Nov 4 | Nov 22 | Dec 12 |
| 24°F | Nov 15 | Dec 8 | Jan 4 |
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 | 189 days | 211 days | 234 days |
| 32°F | 211 days | 235 days | 258 days |
| 28°F | 233 days | 258 days | 284 days |
| 24°F | 257 days | 286 days | 318 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 |
|---|---|---|---|
| 72083 | 8a | 10 to 15°F | 2 km |
| 72046 | 8a | 10 to 15°F | 7 km |
| 72142 | 8a | 10 to 15°F | 11 km |
| 72168 | 8a | 10 to 15°F | 19 km |
| 72182 | 8a | 10 to 15°F | 21 km |
| 72180 | 8a | 10 to 15°F | 22 km |
| 72072 | 8b | 15 to 20°F | 23 km |
| 72024 | 8a | 10 to 15°F | 28 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 USC00033862, at 34.6033, -91.9928, elevation 70 m (231 ft).
- Data quality: Standard (24+ years of data), 30 years of freeze data.
- Average days per year at or below 32°F: 48.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Little Rock Airport Adams Field (26 km)
- Little Rock (36 km)
- Pine Bluff (42 km)
- Cabot (42 km)
- Marche (45 km)
- Pine Bluff Grider Field (48 km)
- Sheridan (50 km)
- Stuttgart 9 ESE (55 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.