Frost dates for Jefferson City Mem Airport, MO
At Jefferson City Mem Airport, the median last spring frost (32°F) is Apr 10 and the median first fall frost is Oct 26, for a typical growing season of 198 days. For a 90% chance that the last frost has passed, wait until Apr 25. Nearby ZIP codes are in USDA hardiness zone 6b.
- Apr 10Last spring frost (median)50% chance of 32°F after this date
- Apr 25Safer planting date10% chance of 32°F after this date
- Oct 26First fall frost (median)50% chance of 32°F by this date
- 198 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 7 | Apr 22 | May 8 |
| 32°F | Mar 26 | Apr 10 | Apr 25 |
| 28°F | Mar 13 | Mar 31 | Apr 15 |
| 24°F | Mar 2 | Mar 20 | Apr 4 |
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 1 | Oct 16 | Oct 27 |
| 32°F | Oct 13 | Oct 26 | Nov 5 |
| 28°F | Oct 23 | Nov 4 | Nov 18 |
| 24°F | Nov 1 | Nov 14 | Dec 2 |
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 | 155 days | 176 days | 196 days |
| 32°F | 178 days | 198 days | 218 days |
| 28°F | 200 days | 220 days | 240 days |
| 24°F | 217 days | 240 days | 264 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 |
|---|---|---|---|
| 65043 | 6b | -5 to 0°F | 6 km |
| 65101 | 6b | -5 to 0°F | 11 km |
| 65080 | 6b | -5 to 0°F | 16 km |
| 65016 | 6b | -5 to 0°F | 21 km |
| 65085 | 6b | -5 to 0°F | 22 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 USW00003963, at 38.5911, -92.1558, elevation 175 m (573 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 101.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Jefferson City Water Plant (2 km)
- Columbia Regional Airport (26 km)
- Fulton (34 km)
- California (35 km)
- Columbia U Of M (42 km)
- Freedom (42 km)
- Eldon (46 km)
- Vienna 2 WNW (46 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.