Frost dates for Lake Wilson, MN
At Lake Wilson, 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 145 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
- 145 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 15 | May 28 |
| 32°F | Apr 25 | May 7 | May 19 |
| 28°F | Apr 13 | Apr 28 | May 10 |
| 24°F | Apr 3 | Apr 18 | 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 6 | Sep 20 | Oct 3 |
| 32°F | Sep 15 | Sep 29 | Oct 13 |
| 28°F | Sep 25 | Oct 8 | Oct 24 |
| 24°F | Oct 5 | Oct 21 | Nov 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 | 108 days | 127 days | 146 days |
| 32°F | 127 days | 145 days | 164 days |
| 28°F | 146 days | 164 days | 185 days |
| 24°F | 164 days | 186 days | 204 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 |
|---|---|---|---|
| 56151 | 5a | -20 to -15°F | 4 km |
| 56186 | 4b | -25 to -20°F | 11 km |
| 56122 | 5a | -20 to -15°F | 11 km |
| 56172 | 5a | -20 to -15°F | 14 km |
| 56141 | 5a | -20 to -15°F | 17 km |
| 56128 | 4b | -25 to -20°F | 18 km |
| 56153 | 4b | -25 to -20°F | 20 km |
| 56170 | 4b | -25 to -20°F | 22 km |
| 56185 | 5a | -20 to -15°F | 24 km |
| 56155 | 5a | -20 to -15°F | 26 km |
| 56147 | 5a | -20 to -15°F | 28 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 USC00214534, at 43.9983, -95.9494, elevation 504 m (1,653 ft).
- Data quality: Standard (24+ years of data), 27 years of freeze data.
- Average days per year at or below 32°F: 171.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Pipestone (30 km)
- Tracy (37 km)
- Worthington 2 NNE (49 km)
- Marshall (54 km)
- Lamberton SW Rsch & Outreach C (57 km)
- Windom (68 km)
- Lakefield 2ne (72 km)
- Springfield 1 NW (82 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.