Frost dates for Wappapello Dam, MO
At Wappapello Dam, the median last spring frost (32°F) is Apr 2 and the median first fall frost is Nov 2, for a typical growing season of 215 days. For a 90% chance that the last frost has passed, wait until Apr 18. Nearby ZIP codes are in USDA hardiness zones 6b to 7b.
- Apr 2Last spring frost (median)50% chance of 32°F after this date
- Apr 18Safer planting date10% chance of 32°F after this date
- Nov 2First fall frost (median)50% chance of 32°F by this date
- 215 daysGrowing season (median)between 32°F freezes
USDA hardiness zone 7a (0 to 5°F) · see all zone 7a frost dates
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 30 | Apr 14 | Apr 28 |
| 32°F | Mar 16 | Apr 2 | Apr 18 |
| 28°F | Mar 3 | Mar 21 | Apr 6 |
| 24°F | Feb 20 | Mar 8 | Mar 27 |
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 13 | Oct 24 | Nov 5 |
| 32°F | Oct 21 | Nov 2 | Nov 18 |
| 28°F | Oct 31 | Nov 14 | Dec 1 |
| 24°F | Nov 7 | Nov 24 | Dec 12 |
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 | 174 days | 192 days | 212 days |
| 32°F | 194 days | 215 days | 237 days |
| 28°F | 215 days | 238 days | 263 days |
| 24°F | 235 days | 262 days | 284 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 |
|---|---|---|---|
| 63966 | 7a | 0 to 5°F | 5 km |
| 63962 | 7b | 5 to 10°F | 9 km |
| 63960 | 7a | 0 to 5°F | 14 km |
| 63967 | 7a | 0 to 5°F | 18 km |
| 63763 | 7a | 0 to 5°F | 18 km |
| 63951 | 7a | 0 to 5°F | 21 km |
| 63944 | 7a | 0 to 5°F | 22 km |
| 63934 | 6b | -5 to 0°F | 32 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 USC00238700, at 36.9231, -90.2836, elevation 125 m (410 ft).
- Data quality: Representative (10+ years), 28 years of freeze data.
- Average days per year at or below 32°F: 92.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Poplar Bluff Muni Airport (17 km)
- Poplar Bluff (21 km)
- Advance 1 S (38 km)
- Malden Muni Airport (45 km)
- Clearwater Dam (49 km)
- Marble Hill (51 km)
- Doniphan (58 km)
- Sikeston Power Station (59 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.