Frost dates for Festus, MO
At Festus, the median last spring frost (32°F) is Apr 9 and the median first fall frost is Oct 26, for a typical growing season of 197 days. For a 90% chance that the last frost has passed, wait until Apr 25. Nearby ZIP codes are in USDA hardiness zones 6b to 7a.
- Apr 9Last 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
- 197 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 5 | Apr 22 | May 8 |
| 32°F | Mar 25 | Apr 9 | Apr 25 |
| 28°F | Mar 12 | Mar 31 | Apr 15 |
| 24°F | Mar 1 | Mar 19 | Apr 3 |
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 4 | Oct 17 | Oct 28 |
| 32°F | Oct 14 | Oct 26 | Nov 8 |
| 28°F | Oct 23 | Nov 5 | Nov 23 |
| 24°F | Nov 2 | Nov 18 | Dec 4 |
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 | 174 days | 195 days |
| 32°F | 177 days | 197 days | 220 days |
| 28°F | 197 days | 221 days | 246 days |
| 24°F | 220 days | 243 days | 269 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 |
|---|---|---|---|
| 63019 | 7a | 0 to 5°F | 2 km |
| 63048 | 7a | 0 to 5°F | 3 km |
| 63070 | 7a | 0 to 5°F | 6 km |
| 62295 | 7a | 0 to 5°F | 9 km |
| 63047 | 7a | 0 to 5°F | 9 km |
| 63028 | 6b | -5 to 0°F | 10 km |
| 63012 | 6b | -5 to 0°F | 14 km |
| 62256 | 7a | 0 to 5°F | 15 km |
| 63053 | 7a | 0 to 5°F | 15 km |
| 63050 | 6b | -5 to 0°F | 16 km |
| 62244 | 7a | 0 to 5°F | 18 km |
| 63052 | 7a | 0 to 5°F | 18 km |
| 63020 | 6b | -5 to 0°F | 21 km |
| 63010 | 7a | 0 to 5°F | 22 km |
| 63051 | 6b | -5 to 0°F | 22 km |
| 62298 | 7a | 0 to 5°F | 23 km |
| 63627 | 6b | -5 to 0°F | 25 km |
| 63016 | 6b | -5 to 0°F | 26 km |
| 63023 | 6b | -5 to 0°F | 27 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 USC00232850, at 38.2325, -90.3981, elevation 183 m (600 ft).
- Data quality: Standard (24+ years of data), 25 years of freeze data.
- Average days per year at or below 32°F: 105.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- St. Louis Sci Center (46 km)
- Farmington (49 km)
- St. Charles 7 SSW (52 km)
- St. Louis Sprt Of S L Airport (52 km)
- Potosi 4 SW (54 km)
- Weldon Spring NWS (57 km)
- St. Louis Lambert Intl Airport (58 km)
- Union (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.