Frost dates for Delphi 2 N, IN
At Delphi 2 N, the median last spring frost (32°F) is Apr 22 and the median first fall frost is Oct 17, for a typical growing season of 179 days. For a 90% chance that the last frost has passed, wait until May 6. Nearby ZIP codes are in USDA hardiness zone 6a.
- Apr 22Last spring frost (median)50% chance of 32°F after this date
- May 6Safer planting date10% chance of 32°F after this date
- Oct 17First fall frost (median)50% chance of 32°F by this date
- 179 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 19 | May 2 | May 19 |
| 32°F | Apr 7 | Apr 22 | May 6 |
| 28°F | Mar 25 | Apr 8 | Apr 23 |
| 24°F | Mar 11 | Mar 30 | Apr 14 |
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 23 | Oct 6 | Oct 21 |
| 32°F | Oct 3 | Oct 17 | Nov 1 |
| 28°F | Oct 16 | Oct 30 | Nov 13 |
| 24°F | Oct 29 | Nov 10 | Nov 28 |
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 | 135 days | 156 days | 175 days |
| 32°F | 157 days | 179 days | 199 days |
| 28°F | 181 days | 203 days | 224 days |
| 24°F | 205 days | 228 days | 252 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 |
|---|---|---|---|
| 46923 | 6a | -10 to -5°F | 2 km |
| 47997 | 6a | -10 to -5°F | 8 km |
| 47924 | 6a | -10 to -5°F | 16 km |
| 47960 | 6a | -10 to -5°F | 21 km |
| 47950 | 6a | -10 to -5°F | 21 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 USC00122149, at 40.6150, -86.6661, elevation 170 m (556 ft).
- Data quality: Representative (10+ years), 20 years of freeze data.
- Average days per year at or below 32°F: 117.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Chalmers 5 W (25 km)
- Logansport Cicott St. (28 km)
- Young America (28 km)
- W Lafayette 6 NW (32 km)
- Lafayette Purdue Univ Airport (32 km)
- Frankfort Disposal (38 km)
- Lafayette 8 S (41 km)
- Kokomo 3 WSW (45 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.