Frost dates for Salem 5ne, SD
At Salem 5ne, the median last spring frost (32°F) is May 7 and the median first fall frost is Sep 29, for a typical growing season of 144 days. For a 90% chance that the last frost has passed, wait until May 19. Nearby ZIP codes are in USDA hardiness zones 4b to 5a.
- May 7Last spring frost (median)50% chance of 32°F after this date
- May 19Safer planting date10% chance of 32°F after this date
- Sep 29First fall frost (median)50% chance of 32°F by this date
- 144 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 | May 5 | May 16 | May 27 |
| 32°F | Apr 25 | May 7 | May 19 |
| 28°F | Apr 14 | Apr 29 | May 11 |
| 24°F | Apr 4 | Apr 18 | May 2 |
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 8 | Sep 21 | Oct 2 |
| 32°F | Sep 17 | Sep 29 | Oct 13 |
| 28°F | Sep 25 | Oct 8 | Oct 22 |
| 24°F | Oct 3 | Oct 20 | Oct 31 |
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 | 111 days | 128 days | 143 days |
| 32°F | 127 days | 144 days | 161 days |
| 28°F | 144 days | 162 days | 182 days |
| 24°F | 162 days | 182 days | 201 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 |
|---|---|---|---|
| 57058 | 5a | -20 to -15°F | 8 km |
| 57012 | 5a | -20 to -15°F | 17 km |
| 57035 | 4b | -25 to -20°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 USC00395360, at 43.7447, -97.3081, elevation 486 m (1,594 ft).
- Data quality: Representative (10+ years), 13 years of freeze data.
- Average days per year at or below 32°F: 169.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Montrose 8n (12 km)
- Winfred 2s (25 km)
- Bridgewater (26 km)
- Madison 2se (32 km)
- Howard (35 km)
- Wentworth 2.5 WNW (38 km)
- Alexandria (41 km)
- Sioux Falls WFO Airport (50 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.