Frost dates for Sparkman, AR
At Sparkman, the median last spring frost (32°F) is Mar 29 and the median first fall frost is Nov 4, for a typical growing season of 223 days. For a 90% chance that the last frost has passed, wait until Apr 18. Nearby ZIP codes are in USDA hardiness zone 8a.
- Mar 29Last spring frost (median)50% chance of 32°F after this date
- Apr 18Safer planting date10% chance of 32°F after this date
- Nov 4First fall frost (median)50% chance of 32°F by this date
- 223 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 22 | Apr 9 | Apr 29 |
| 32°F | Mar 5 | Mar 29 | Apr 18 |
| 28°F | Feb 18 | Mar 10 | Apr 4 |
| 24°F | Jan 29 | Feb 25 | Mar 15 |
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 12 | Oct 26 | Nov 8 |
| 32°F | Oct 21 | Nov 4 | Nov 24 |
| 28°F | Oct 31 | Nov 17 | Dec 9 |
| 24°F | Nov 10 | Dec 1 | Jan 1 |
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 | 223 days |
| 32°F | 196 days | 223 days | 249 days |
| 28°F | 220 days | 249 days | 279 days |
| 24°F | 250 days | 282 days | 316 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 |
|---|---|---|---|
| 71763 | 8a | 10 to 15°F | 2 km |
| 71743 | 8a | 10 to 15°F | 25 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 USC00036768, at 33.9153, -92.8267, elevation 52 m (170 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 75.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Arkadelphia 2 N (33 km)
- Leola (36 km)
- Camden 1 (36 km)
- Fordyce (41 km)
- Hot Springs Asos (47 km)
- Degray Lake State Park (48 km)
- Prescott 2 NNW (53 km)
- Malvern (53 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.