Frost dates for Perryville Water Plant, MO
At Perryville Water Plant, the median last spring frost (32°F) is Apr 19 and the median first fall frost is Oct 20, for a typical growing season of 182 days. For a 90% chance that the last frost has passed, wait until May 3. Nearby ZIP codes are in USDA hardiness zones 6b to 7a.
- Apr 19Last spring frost (median)50% chance of 32°F after this date
- May 3Safer planting date10% chance of 32°F after this date
- Oct 20First fall frost (median)50% chance of 32°F by this date
- 182 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 | Apr 15 | Apr 30 | May 15 |
| 32°F | Apr 3 | Apr 19 | May 3 |
| 28°F | Mar 20 | Apr 5 | Apr 22 |
| 24°F | Mar 6 | Mar 25 | Apr 9 |
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 | Sep 27 | Oct 10 | Oct 22 |
| 32°F | Oct 5 | Oct 20 | Oct 31 |
| 28°F | Oct 16 | Oct 30 | Nov 11 |
| 24°F | Oct 25 | Nov 8 | Nov 26 |
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 | 143 days | 161 days | 180 days |
| 32°F | 161 days | 182 days | 203 days |
| 28°F | 183 days | 205 days | 227 days |
| 24°F | 205 days | 228 days | 253 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 |
|---|---|---|---|
| 63775 | 6b | -5 to 0°F | 5 km |
| 63673 | 6b | -5 to 0°F | 13 km |
| 63746 | 7a | 0 to 5°F | 20 km |
| 63747 | 7a | 0 to 5°F | 22 km |
| 63781 | 6b | -5 to 0°F | 23 km |
| 63783 | 7a | 0 to 5°F | 25 km |
| 62280 | 7a | 0 to 5°F | 27 km |
| 63748 | 7a | 0 to 5°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 USC00236641, at 37.7342, -89.9200, elevation 153 m (502 ft).
- Data quality: Standard (24+ years of data), 27 years of freeze data.
- Average days per year at or below 32°F: 114.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Fredericktown (38 km)
- Farmington (44 km)
- Jackson (45 km)
- Marble Hill (48 km)
- Cape Girardeau Muni Airport (64 km)
- Festus (69 km)
- Advance 1 S (71 km)
- Potosi 4 SW (83 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.