Frost dates for Glenwood 2wnw, MN
At Glenwood 2wnw, the median last spring frost (32°F) is May 11 and the median first fall frost is Sep 27, for a typical growing season of 139 days. For a 90% chance that the last frost has passed, wait until May 27. Nearby ZIP codes are in USDA hardiness zone 4b.
- May 11Last spring frost (median)50% chance of 32°F after this date
- May 27Safer planting date10% chance of 32°F after this date
- Sep 27First fall frost (median)50% chance of 32°F by this date
- 139 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 7 | May 23 | Jun 7 |
| 32°F | Apr 28 | May 11 | May 27 |
| 28°F | Apr 16 | May 1 | May 16 |
| 24°F | Apr 6 | Apr 22 | May 6 |
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 3 | Sep 19 | Sep 30 |
| 32°F | Sep 13 | Sep 27 | Oct 9 |
| 28°F | Sep 23 | Oct 6 | Oct 20 |
| 24°F | Oct 1 | Oct 16 | 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 | 98 days | 118 days | 138 days |
| 32°F | 117 days | 139 days | 157 days |
| 28°F | 135 days | 156 days | 178 days |
| 24°F | 155 days | 177 days | 196 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 |
|---|---|---|---|
| 56349 | 4b | -25 to -20°F | 9 km |
| 56334 | 4b | -25 to -20°F | 12 km |
| 56381 | 4b | -25 to -20°F | 14 km |
| 56327 | 4b | -25 to -20°F | 17 km |
| 56385 | 4b | -25 to -20°F | 18 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 USC00213174, at 45.6583, -95.4392, elevation 365 m (1,198 ft).
- Data quality: Standard (24+ years of data), 27 years of freeze data.
- Average days per year at or below 32°F: 175.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Alexandria Muni Airport (24 km)
- Morris W Cntrl Rsch & Outreach (35 km)
- Benson (40 km)
- Melrose (50 km)
- Long Prairie (55 km)
- New London (55 km)
- Willmar 5n (60 km)
- Artichoke Lake 1 E (61 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.