Frost dates for Chillicothe 22 ENE, MO
At Chillicothe 22 ENE, the median last spring frost (32°F) is Apr 15 and the median first fall frost is Oct 20, for a typical growing season of 184 days. For a 90% chance that the last frost has passed, wait until May 2. Nearby ZIP codes are in USDA hardiness zone 6a.
- Apr 15Last spring frost (median)50% chance of 32°F after this date
- May 2Safer planting date10% chance of 32°F after this date
- Oct 20First 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 11 | Apr 28 | May 13 |
| 32°F | Apr 1 | Apr 15 | May 2 |
| 28°F | Mar 20 | Apr 5 | Apr 20 |
| 24°F | Mar 8 | Mar 25 | Apr 10 |
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 25 | Oct 9 | Oct 22 |
| 32°F | Oct 5 | Oct 20 | Nov 1 |
| 28°F | Oct 16 | Oct 29 | Nov 12 |
| 24°F | Oct 26 | Nov 7 | 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 | 141 days | 162 days | 183 days |
| 32°F | 161 days | 184 days | 205 days |
| 28°F | 188 days | 207 days | 228 days |
| 24°F | 207 days | 227 days | 251 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 |
|---|---|---|---|
| 64653 | 6a | -10 to -5°F | 5 km |
| 64674 | 6a | -10 to -5°F | 11 km |
| 64630 | 6a | -10 to -5°F | 19 km |
| 63566 | 6a | -10 to -5°F | 25 km |
| 63557 | 6a | -10 to -5°F | 26 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 USW00013301, at 39.8667, -93.1469, elevation 254 m (833 ft).
- Data quality: Representative (10+ years), 15 years of freeze data.
- Average days per year at or below 32°F: 116.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Linneus 3se (1 km)
- Brookfield (14 km)
- Chillicothe 2s (35 km)
- Chillicothe Agri-Sci (37 km)
- Trenton (46 km)
- Brunswick (49 km)
- Long Branch Rsvr (56 km)
- Green City 5n (56 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.