Frost dates for Canton L&d 20, MO
At Canton L&d 20, the median last spring frost (32°F) is Apr 11 and the median first fall frost is Oct 23, for a typical growing season of 194 days. For a 90% chance that the last frost has passed, wait until Apr 29. Nearby ZIP codes are in USDA hardiness zone 6a.
- Apr 11Last spring frost (median)50% chance of 32°F after this date
- Apr 29Safer planting date10% chance of 32°F after this date
- Oct 23First fall frost (median)50% chance of 32°F by this date
- 194 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 10 | Apr 23 | May 7 |
| 32°F | Mar 29 | Apr 11 | Apr 29 |
| 28°F | Mar 17 | Apr 2 | Apr 15 |
| 24°F | Mar 6 | Mar 24 | Apr 7 |
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 30 | Oct 14 | Oct 26 |
| 32°F | Oct 10 | Oct 23 | Nov 4 |
| 28°F | Oct 21 | Nov 1 | Nov 16 |
| 24°F | Nov 1 | Nov 12 | Nov 29 |
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 | 153 days | 173 days | 192 days |
| 32°F | 173 days | 194 days | 211 days |
| 28°F | 194 days | 213 days | 234 days |
| 24°F | 213 days | 235 days | 257 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 |
|---|---|---|---|
| 63435 | 6a | -10 to -5°F | 8 km |
| 62376 | 6a | -10 to -5°F | 10 km |
| 62348 | 6a | -10 to -5°F | 13 km |
| 63448 | 6a | -10 to -5°F | 14 km |
| 63466 | 6a | -10 to -5°F | 16 km |
| 63457 | 6a | -10 to -5°F | 17 km |
| 62373 | 6a | -10 to -5°F | 17 km |
| 63473 | 6a | -10 to -5°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 USC00231275, at 40.1439, -91.5158, elevation 149 m (490 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 122.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Steffenville (37 km)
- Hannibal Wtr Wks (48 km)
- Monroe City (59 km)
- Saverton L&d 22 (61 km)
- Memphis (66 km)
- Shelbina (68 km)
- Kirksville Regional Airport (88 km)
- Kirksville (90 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.