Frost dates for Steelville 2 N, MO
At Steelville 2 N, the median last spring frost (32°F) is Apr 26 and the median first fall frost is Oct 8, for a typical growing season of 164 days. For a 90% chance that the last frost has passed, wait until May 12. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- Apr 26Last spring frost (median)50% chance of 32°F after this date
- May 12Safer planting date10% chance of 32°F after this date
- Oct 8First fall frost (median)50% chance of 32°F by this date
- 164 daysGrowing season (median)between 32°F freezes
USDA hardiness zone 6b (-5 to 0°F) · see all zone 6b frost dates
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 21 | May 5 | May 22 |
| 32°F | Apr 9 | Apr 26 | May 12 |
| 28°F | Mar 28 | Apr 14 | May 1 |
| 24°F | Mar 14 | Apr 2 | Apr 21 |
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 17 | Oct 1 | Oct 12 |
| 32°F | Sep 25 | Oct 8 | Oct 23 |
| 28°F | Oct 3 | Oct 18 | Nov 1 |
| 24°F | Oct 15 | Oct 28 | Nov 10 |
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 | 127 days | 147 days | 166 days |
| 32°F | 144 days | 164 days | 187 days |
| 28°F | 162 days | 184 days | 209 days |
| 24°F | 184 days | 207 days | 230 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 |
|---|---|---|---|
| 65535 | 6b | -5 to 0°F | 11 km |
| 65453 | 6b | -5 to 0°F | 12 km |
| 65586 | 6a | -10 to -5°F | 17 km |
| 65565 | 6a | -10 to -5°F | 17 km |
| 65449 | 6b | -5 to 0°F | 20 km |
| 65441 | 6b | -5 to 0°F | 21 km |
| 65446 | 6b | -5 to 0°F | 23 km |
| 65566 | 6b | -5 to 0°F | 29 km |
| 65456 | 6b | -5 to 0°F | 29 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 USC00238043, at 38.0053, -91.3706, elevation 213 m (700 ft).
- Data quality: Representative (10+ years), 12 years of freeze data.
- Average days per year at or below 32°F: 141.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Rolla Missouri S&t (36 km)
- Vichy Rolla National Airport (38 km)
- Salem (44 km)
- Potosi 4 SW (48 km)
- Rosebud (50 km)
- Salem 10 W (52 km)
- Vienna 2 WNW (58 km)
- Freedom (58 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.