Frost dates for Martinsville 2 SW, IN
At Martinsville 2 SW, the median last spring frost (32°F) is Apr 24 and the median first fall frost is Oct 15, for a typical growing season of 173 days. For a 90% chance that the last frost has passed, wait until May 11. Nearby ZIP codes are in USDA hardiness zones 6a to 6b.
- Apr 24Last spring frost (median)50% chance of 32°F after this date
- May 11Safer planting date10% chance of 32°F after this date
- Oct 15First fall frost (median)50% chance of 32°F by this date
- 173 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 20 | May 4 | May 21 |
| 32°F | Apr 10 | Apr 24 | May 11 |
| 28°F | Mar 29 | Apr 12 | Apr 30 |
| 24°F | Mar 14 | Mar 31 | 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 24 | Oct 6 | Oct 19 |
| 32°F | Oct 2 | Oct 15 | Oct 29 |
| 28°F | Oct 12 | Oct 26 | Nov 7 |
| 24°F | Oct 23 | Nov 5 | Nov 24 |
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 | 132 days | 154 days | 173 days |
| 32°F | 152 days | 173 days | 191 days |
| 28°F | 171 days | 194 days | 214 days |
| 24°F | 196 days | 217 days | 241 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 |
|---|---|---|---|
| 46151 | 6a | -10 to -5°F | 7 km |
| 46166 | 6a | -10 to -5°F | 12 km |
| 47468 | 6b | -5 to 0°F | 14 km |
| 46160 | 6b | -5 to 0°F | 17 km |
| 46111 | 6a | -10 to -5°F | 17 km |
| 46157 | 6a | -10 to -5°F | 18 km |
| 47435 | 6b | -5 to 0°F | 20 km |
| 46125 | 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 USC00125407, at 39.4039, -86.4530, elevation 180 m (592 ft).
- Data quality: Standard (24+ years of data), 30 years of freeze data.
- Average days per year at or below 32°F: 127.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Bloomington Indiana Univ (26 km)
- Spencer (30 km)
- Bloomington Monroe Co Airport (33 km)
- Franklin Wastewater Plant (36 km)
- Indianapolis Nwfo (37 km)
- Indianapolis (37 km)
- Greencastle 1 W (45 km)
- Indianapolis SE Side (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.