Frost dates for Patoka Lake, IN
At Patoka Lake, the median last spring frost (32°F) is Apr 10 and the median first fall frost is Nov 1, for a typical growing season of 204 days. For a 90% chance that the last frost has passed, wait until Apr 26. Nearby ZIP codes are in USDA hardiness zone 6b.
- Apr 10Last spring frost (median)50% chance of 32°F after this date
- Apr 26Safer planting date10% chance of 32°F after this date
- Nov 1First fall frost (median)50% chance of 32°F by this date
- 204 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 8 | Apr 21 | May 6 |
| 32°F | Mar 27 | Apr 10 | Apr 26 |
| 28°F | Mar 13 | Mar 30 | Apr 15 |
| 24°F | Feb 28 | Mar 18 | Apr 3 |
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 8 | Oct 22 | Nov 3 |
| 32°F | Oct 20 | Nov 1 | Nov 14 |
| 28°F | Nov 1 | Nov 11 | Nov 28 |
| 24°F | Nov 7 | Nov 22 | Dec 11 |
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 | 162 days | 182 days | 200 days |
| 32°F | 183 days | 204 days | 225 days |
| 28°F | 206 days | 228 days | 252 days |
| 24°F | 226 days | 250 days | 275 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 |
|---|---|---|---|
| 47521 | 6b | -5 to 0°F | 3 km |
| 47580 | 6b | -5 to 0°F | 11 km |
| 47513 | 6b | -5 to 0°F | 15 km |
| 47575 | 6b | -5 to 0°F | 15 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 USC00126711, at 38.4353, -86.7033, elevation 171 m (561 ft).
- Data quality: Estimated from nearby stations (2+ years), 3 years of freeze data.
- Average days per year at or below 32°F: 102.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Dubois S In Forage Fm (2 km)
- Shoals 8 S (15 km)
- Paoli (23 km)
- English (27 km)
- Saint Meinrad (32 km)
- Stendal (44 km)
- Petersburg 61 Brg (49 km)
- Washington 1 W (49 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.