Frost dates for Vandalia, MO
At Vandalia, 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 192 days. For a 90% chance that the last frost has passed, wait until Apr 25. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- Apr 11Last spring frost (median)50% chance of 32°F after this date
- Apr 25Safer planting date10% chance of 32°F after this date
- Oct 23First fall frost (median)50% chance of 32°F by this date
- 192 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 9 | Apr 23 | May 7 |
| 32°F | Mar 31 | Apr 11 | Apr 25 |
| 28°F | Mar 17 | Apr 1 | Apr 15 |
| 24°F | Mar 7 | Mar 22 | Apr 6 |
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 28 | Oct 14 | Oct 24 |
| 32°F | Oct 7 | Oct 23 | Nov 3 |
| 28°F | Oct 19 | Nov 1 | Nov 14 |
| 24°F | Oct 30 | Nov 10 | Nov 27 |
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 | 151 days | 171 days | 190 days |
| 32°F | 173 days | 192 days | 211 days |
| 28°F | 193 days | 212 days | 231 days |
| 24°F | 212 days | 232 days | 254 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 |
|---|---|---|---|
| 63382 | 6b | -5 to 0°F | 0 km |
| 63345 | 6b | -5 to 0°F | 8 km |
| 63339 | 6a | -10 to -5°F | 12 km |
| 63352 | 6b | -5 to 0°F | 16 km |
| 63359 | 6b | -5 to 0°F | 21 km |
| 63462 | 6a | -10 to -5°F | 22 km |
| 63384 | 6b | -5 to 0°F | 24 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 USC00238577, at 39.3075, -91.4925, elevation 233 m (764 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 119.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Bowling Green 1 E (28 km)
- Mexico (37 km)
- Monroe City (41 km)
- Saverton L&d 22 (42 km)
- Hannibal Wtr Wks (47 km)
- Clarksville L&d 24 (51 km)
- Warrenton 1 N (61 km)
- Shelbina (63 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.