Frost dates for Newton 6 SSE, IL
At Newton 6 SSE, 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 191 days. For a 90% chance that the last frost has passed, wait until Apr 27. Nearby ZIP codes are in USDA hardiness zone 6b.
- Apr 13Last spring frost (median)50% chance of 32°F after this date
- Apr 27Safer planting date10% chance of 32°F after this date
- Oct 22First fall frost (median)50% chance of 32°F by this date
- 191 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 24 | May 11 |
| 32°F | Mar 31 | Apr 13 | Apr 27 |
| 28°F | Mar 19 | Apr 2 | Apr 16 |
| 24°F | Mar 8 | Mar 24 | 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 27 | Oct 12 | Oct 24 |
| 32°F | Oct 6 | Oct 22 | Nov 3 |
| 28°F | Oct 18 | Nov 1 | Nov 17 |
| 24°F | Nov 1 | Nov 14 | Dec 1 |
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 | 146 days | 169 days | 189 days |
| 32°F | 171 days | 191 days | 210 days |
| 28°F | 192 days | 213 days | 232 days |
| 24°F | 217 days | 237 days | 260 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 |
|---|---|---|---|
| 62475 | 6b | -5 to 0°F | 7 km |
| 62459 | 6b | -5 to 0°F | 8 km |
| 62425 | 6b | -5 to 0°F | 9 km |
| 62480 | 6b | -5 to 0°F | 14 km |
| 62434 | 6b | -5 to 0°F | 19 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 USC00116159, at 38.9136, -88.1183, elevation 155 m (510 ft).
- Data quality: Representative (10+ years), 13 years of freeze data.
- Average days per year at or below 32°F: 109.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Newton (10 km)
- Olney 2s (24 km)
- Robinson (31 km)
- Lawrenceville 2wsw (40 km)
- Flora (41 km)
- Palestine (44 km)
- Casey (44 km)
- Flora 5 NW (46 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.