Frost dates for Clarksville L&d 24, MO
At Clarksville L&d 24, the median last spring frost (32°F) is Apr 4 and the median first fall frost is Nov 1, for a typical growing season of 208 days. For a 90% chance that the last frost has passed, wait until Apr 23. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- Apr 4Last spring frost (median)50% chance of 32°F after this date
- Apr 23Safer planting date10% chance of 32°F after this date
- Nov 1First fall frost (median)50% chance of 32°F by this date
- 208 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 2 | Apr 16 | May 3 |
| 32°F | Mar 20 | Apr 4 | Apr 23 |
| 28°F | Mar 9 | Mar 24 | Apr 8 |
| 24°F | Feb 28 | Mar 15 | Mar 31 |
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 9 | Oct 23 | Nov 2 |
| 32°F | Oct 19 | Nov 1 | Nov 15 |
| 28°F | Oct 30 | Nov 11 | Nov 26 |
| 24°F | Nov 5 | Nov 20 | Dec 6 |
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 | 167 days | 188 days | 207 days |
| 32°F | 189 days | 208 days | 230 days |
| 28°F | 210 days | 229 days | 250 days |
| 24°F | 227 days | 249 days | 270 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 |
|---|---|---|---|
| 63336 | 6b | -5 to 0°F | 5 km |
| 62366 | 6b | -5 to 0°F | 11 km |
| 62355 | 6a | -10 to -5°F | 12 km |
| 62370 | 6b | -5 to 0°F | 18 km |
| 63344 | 6b | -5 to 0°F | 18 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 USC00231640, at 39.3736, -90.9061, elevation 140 m (460 ft).
- Data quality: Representative (10+ years), 23 years of freeze data.
- Average days per year at or below 32°F: 108.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Bowling Green 1 E (23 km)
- Elsberry 1 S (26 km)
- Saverton L&d 22 (42 km)
- Vandalia (51 km)
- Hannibal Wtr Wks (56 km)
- Warrenton 1 N (63 km)
- St. Charles Co Airport (64 km)
- St. Charles Elm Point (71 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.