Frost dates for Grand Chain Dam 53, IL
At Grand Chain Dam 53, the median last spring frost (32°F) is Apr 3 and the median first fall frost is Nov 5, for a typical growing season of 216 days. For a 90% chance that the last frost has passed, wait until Apr 21. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 3Last spring frost (median)50% chance of 32°F after this date
- Apr 21Safer planting date10% chance of 32°F after this date
- Nov 5First fall frost (median)50% chance of 32°F by this date
- 216 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 | Mar 31 | Apr 14 | May 2 |
| 32°F | Mar 17 | Apr 3 | Apr 21 |
| 28°F | Mar 2 | Mar 22 | Apr 7 |
| 24°F | Feb 17 | Mar 11 | Mar 30 |
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 13 | Oct 25 | Nov 6 |
| 32°F | Oct 23 | Nov 5 | Nov 22 |
| 28°F | Nov 3 | Nov 17 | Dec 4 |
| 24°F | Nov 10 | Nov 28 | Dec 18 |
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 | 172 days | 193 days | 211 days |
| 32°F | 194 days | 216 days | 238 days |
| 28°F | 214 days | 239 days | 263 days |
| 24°F | 235 days | 261 days | 289 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 |
|---|---|---|---|
| 62970 | 7a | 0 to 5°F | 6 km |
| 62941 | 7a | 0 to 5°F | 8 km |
| 62996 | 7a | 0 to 5°F | 11 km |
| 42022 | 7a | 0 to 5°F | 11 km |
| 42056 | 7a | 0 to 5°F | 12 km |
| 62992 | 7a | 0 to 5°F | 12 km |
| 62956 | 7a | 0 to 5°F | 13 km |
| 62976 | 7a | 0 to 5°F | 15 km |
| 62923 | 7a | 0 to 5°F | 15 km |
| 62908 | 7a | 0 to 5°F | 20 km |
| 62988 | 7a | 0 to 5°F | 23 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 USC00113580, at 37.2036, -89.0422, elevation 117 m (385 ft).
- Data quality: Representative (10+ years), 19 years of freeze data.
- Average days per year at or below 32°F: 80.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Cairo 3n (22 km)
- Anna 2 NNE (35 km)
- Brookport Dam 52 (36 km)
- Dixon Springs Agric Center (42 km)
- Smithland L&d (54 km)
- Carbondale Sewage Plant (60 km)
- Rosiclare 5nw (63 km)
- Carbondale Southern Il Airport (67 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.