Frost dates for Pierre Regional Airport, SD
At Pierre Regional Airport, the median last spring frost (32°F) is May 6 and the median first fall frost is Oct 3, for a typical growing season of 148 days. For a 90% chance that the last frost has passed, wait until May 21. Nearby ZIP codes are in USDA hardiness zones 4b to 5a.
- May 6Last spring frost (median)50% chance of 32°F after this date
- May 21Safer planting date10% chance of 32°F after this date
- Oct 3First fall frost (median)50% chance of 32°F by this date
- 148 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 3 | May 16 | May 30 |
| 32°F | Apr 24 | May 6 | May 21 |
| 28°F | Apr 12 | Apr 26 | May 10 |
| 24°F | Apr 1 | Apr 17 | May 1 |
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 13 | Sep 25 | Oct 8 |
| 32°F | Sep 20 | Oct 3 | Oct 17 |
| 28°F | Sep 27 | Oct 12 | Oct 27 |
| 24°F | Oct 5 | Oct 23 | Nov 5 |
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 | 114 days | 131 days | 149 days |
| 32°F | 130 days | 148 days | 167 days |
| 28°F | 146 days | 167 days | 189 days |
| 24°F | 164 days | 187 days | 208 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 57501 | 4b | -25 to -20°F | 16 km |
| 57532 | 4b | -25 to -20°F | 22 km |
| 57522 | 4b | -25 to -20°F | 29 km |
| 57536 | 4b | -25 to -20°F | 41 km |
| 57564 | 4b | -25 to -20°F | 45 km |
| 57531 | 5a | -20 to -15°F | 48 km |
| 57576 | 5a | -20 to -15°F | 53 km |
| 57520 | 4b | -25 to -20°F | 53 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 USW00024025, at 44.3814, -100.2856, elevation 531 m (1,742 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 164.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Oahe Dam (12 km)
- Fort Pierre 17 WSW (33 km)
- Harrold 12 SSW (38 km)
- Onida 4 NW (41 km)
- Pierre 24 S (41 km)
- Presho 7 NW (44 km)
- Mission Ridge 5nw (57 km)
- Kennebec (63 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.