Frost dates for White Hall 1 E, IL
At White Hall 1 E, the median last spring frost (32°F) is Apr 13 and the median first fall frost is Oct 22, for a typical growing season of 190 days. For a 90% chance that the last frost has passed, wait until Apr 28. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- Apr 13Last spring frost (median)50% chance of 32°F after this date
- Apr 28Safer planting date10% chance of 32°F after this date
- Oct 22First fall frost (median)50% chance of 32°F by this date
- 190 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 25 | May 9 |
| 32°F | Mar 30 | Apr 13 | Apr 28 |
| 28°F | Mar 16 | Apr 2 | Apr 17 |
| 24°F | Mar 5 | Mar 22 | Apr 6 |
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 29 | Oct 12 | Oct 24 |
| 32°F | Oct 9 | Oct 22 | Nov 2 |
| 28°F | Oct 19 | Nov 1 | Nov 14 |
| 24°F | Oct 29 | Nov 11 | 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 | 151 days | 169 days | 188 days |
| 32°F | 170 days | 190 days | 210 days |
| 28°F | 191 days | 211 days | 233 days |
| 24°F | 210 days | 233 days | 257 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 |
|---|---|---|---|
| 62092 | 6a | -10 to -5°F | 5 km |
| 62082 | 6a | -10 to -5°F | 8 km |
| 62098 | 6a | -10 to -5°F | 9 km |
| 62078 | 6a | -10 to -5°F | 10 km |
| 62663 | 6a | -10 to -5°F | 12 km |
| 62016 | 6a | -10 to -5°F | 16 km |
| 62050 | 6b | -5 to 0°F | 17 km |
| 62044 | 6a | -10 to -5°F | 17 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 USC00119241, at 39.4408, -90.3789, elevation 177 m (580 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 120.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Winchester (23 km)
- Jacksonville 2 (33 km)
- Jacksonville 2e (36 km)
- Jerseyville 2 SW (38 km)
- Pittsfield #2 (41 km)
- Carlinville (47 km)
- Virden (53 km)
- Perry 6 NW (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.