Frost dates for Boonville 1s, IN
At Boonville 1s, the median last spring frost (32°F) is Apr 12 and the median first fall frost is Oct 25, for a typical growing season of 196 days. For a 90% chance that the last frost has passed, wait until Apr 28. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 12Last spring frost (median)50% chance of 32°F after this date
- Apr 28Safer planting date10% chance of 32°F after this date
- Oct 25First fall frost (median)50% chance of 32°F by this date
- 196 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 23 | May 10 |
| 32°F | Mar 28 | Apr 12 | Apr 28 |
| 28°F | Mar 14 | Mar 30 | Apr 14 |
| 24°F | Mar 1 | Mar 19 | Apr 4 |
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 3 | Oct 16 | Oct 27 |
| 32°F | Oct 12 | Oct 25 | Nov 5 |
| 28°F | Oct 22 | Nov 3 | Nov 20 |
| 24°F | Nov 2 | Nov 15 | Dec 3 |
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 | 155 days | 175 days | 193 days |
| 32°F | 175 days | 196 days | 216 days |
| 28°F | 198 days | 218 days | 238 days |
| 24°F | 219 days | 240 days | 268 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 |
|---|---|---|---|
| 47601 | 7a | 0 to 5°F | 3 km |
| 47610 | 7a | 0 to 5°F | 11 km |
| 47634 | 7a | 0 to 5°F | 13 km |
| 47611 | 7a | 0 to 5°F | 19 km |
| 47635 | 7a | 0 to 5°F | 22 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 USC00120852, at 38.0303, -87.2736, elevation 122 m (400 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 90.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Newburgh L&d (14 km)
- Evansville Regional Airport (22 km)
- Evansville Museum (27 km)
- Stendal (28 km)
- Saint Meinrad (43 km)
- Tell City (45 km)
- Princeton 1 W (46 km)
- Petersburg 61 Brg (48 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.