Frost dates for Malden Muni Airport, MO
At Malden Muni Airport, the median last spring frost (32°F) is Mar 29 and the median first fall frost is Nov 3, for a typical growing season of 221 days. For a 90% chance that the last frost has passed, wait until Apr 12. Nearby ZIP codes are in USDA hardiness zone 7b.
- Mar 29Last spring frost (median)50% chance of 32°F after this date
- Apr 12Safer planting date10% chance of 32°F after this date
- Nov 3First fall frost (median)50% chance of 32°F by this date
- 221 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 25 | Apr 8 | Apr 24 |
| 32°F | Mar 12 | Mar 29 | Apr 12 |
| 28°F | Feb 28 | Mar 17 | Apr 3 |
| 24°F | Feb 14 | Mar 5 | Mar 23 |
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 15 | Oct 26 | Nov 7 |
| 32°F | Oct 23 | Nov 3 | Nov 22 |
| 28°F | Nov 1 | Nov 15 | Dec 3 |
| 24°F | Nov 8 | Nov 29 | Dec 18 |
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 | 180 days | 198 days | 219 days |
| 32°F | 201 days | 221 days | 244 days |
| 28°F | 219 days | 243 days | 269 days |
| 24°F | 240 days | 266 days | 293 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 |
|---|---|---|---|
| 63863 | 7b | 5 to 10°F | 4 km |
| 63822 | 7b | 5 to 10°F | 7 km |
| 63870 | 7b | 5 to 10°F | 13 km |
| 63933 | 7b | 5 to 10°F | 14 km |
| 63874 | 7b | 5 to 10°F | 16 km |
| 63837 | 7b | 5 to 10°F | 17 km |
| 63847 | 7b | 5 to 10°F | 18 km |
| 63841 | 7b | 5 to 10°F | 19 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 USC00235207, at 36.5994, -89.9894, elevation 88 m (290 ft).
- Data quality: Standard (24+ years of data), 30 years of freeze data.
- Average days per year at or below 32°F: 77.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Portageville (33 km)
- Poplar Bluff Muni Airport (36 km)
- New Madrid (41 km)
- Poplar Bluff (41 km)
- Kennett Radio Kboa (42 km)
- Wappapello Dam (45 km)
- Sikeston Power Station (45 km)
- Caruthersville (54 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.