Frost dates for Steffenville, MO
At Steffenville, the median last spring frost (32°F) is Apr 17 and the median first fall frost is Oct 19, for a typical growing season of 184 days. For a 90% chance that the last frost has passed, wait until May 4. Nearby ZIP codes are in USDA hardiness zone 6a.
- Apr 17Last spring frost (median)50% chance of 32°F after this date
- May 4Safer planting date10% chance of 32°F after this date
- Oct 19First fall frost (median)50% chance of 32°F by this date
- 184 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 13 |
| 32°F | Apr 3 | Apr 17 | May 4 |
| 28°F | Mar 22 | Apr 7 | Apr 23 |
| 24°F | Mar 9 | Mar 28 | Apr 13 |
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 20 | Oct 7 | Oct 22 |
| 32°F | Sep 30 | Oct 19 | Oct 31 |
| 28°F | Oct 14 | Oct 30 | Nov 12 |
| 24°F | Oct 26 | Nov 8 | Nov 23 |
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 | 141 days | 160 days | 183 days |
| 32°F | 160 days | 184 days | 202 days |
| 28°F | 181 days | 205 days | 224 days |
| 24°F | 203 days | 224 days | 246 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 |
|---|---|---|---|
| 63434 | 6a | -10 to -5°F | 8 km |
| 63458 | 6a | -10 to -5°F | 12 km |
| 63440 | 6a | -10 to -5°F | 12 km |
| 63447 | 6a | -10 to -5°F | 14 km |
| 63463 | 6a | -10 to -5°F | 16 km |
| 63452 | 6a | -10 to -5°F | 16 km |
| 63438 | 6a | -10 to -5°F | 17 km |
| 63439 | 6a | -10 to -5°F | 19 km |
| 63446 | 6a | -10 to -5°F | 21 km |
| 63460 | 6a | -10 to -5°F | 28 km |
| 63451 | 6a | -10 to -5°F | 28 km |
| 63537 | 6a | -10 to -5°F | 30 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 USC00238051, at 39.9703, -91.8875, elevation 215 m (705 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 113.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Shelbina (35 km)
- Canton L&d 20 (37 km)
- Monroe City (40 km)
- Hannibal Wtr Wks (52 km)
- Kirksville Regional Airport (58 km)
- Long Branch Rsvr (58 km)
- Memphis (60 km)
- Kirksville (64 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.