Frost dates for Mc Henry -Wg Stratton L&d, IL
At Mc Henry -Wg Stratton L&d, the median last spring frost (32°F) is May 1 and the median first fall frost is Oct 11, for a typical growing season of 162 days. For a 90% chance that the last frost has passed, wait until May 19. Nearby ZIP codes are in USDA hardiness zone 5b.
- May 1Last spring frost (median)50% chance of 32°F after this date
- May 19Safer planting date10% chance of 32°F after this date
- Oct 11First fall frost (median)50% chance of 32°F by this date
- 162 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 28 | May 12 | May 28 |
| 32°F | Apr 16 | May 1 | May 19 |
| 28°F | Apr 5 | Apr 19 | May 6 |
| 24°F | Mar 24 | Apr 8 | Apr 22 |
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 19 | Oct 1 | Oct 14 |
| 32°F | Sep 27 | Oct 11 | Oct 24 |
| 28°F | Oct 7 | Oct 22 | Nov 4 |
| 24°F | Oct 21 | Nov 2 | Nov 17 |
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 | 120 days | 141 days | 160 days |
| 32°F | 142 days | 162 days | 181 days |
| 28°F | 165 days | 185 days | 204 days |
| 24°F | 188 days | 209 days | 229 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 |
|---|---|---|---|
| 60050 | 5b | -15 to -10°F | 4 km |
| 60051 | 5b | -15 to -10°F | 5 km |
| 60042 | 5b | -15 to -10°F | 6 km |
| 60012 | 5b | -15 to -10°F | 6 km |
| 60013 | 5b | -15 to -10°F | 10 km |
| 60072 | 5b | -15 to -10°F | 12 km |
| 60097 | 5b | -15 to -10°F | 14 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 USC00115493, at 42.3092, -88.2533, elevation 224 m (736 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 144.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Crystal Lake 4nw (13 km)
- Mundelein 4 WSW (16 km)
- Lake Villa 2ne (21 km)
- Barrington 3sw (23 km)
- Antioch (23 km)
- Elgin (28 km)
- Marengo (30 km)
- Waukegan (31 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.