Frost dates for Morris W Cntrl Rsch & Outreach, MN
At Morris W Cntrl Rsch & Outreach, the median last spring frost (32°F) is May 4 and the median first fall frost is Oct 1, for a typical growing season of 150 days. For a 90% chance that the last frost has passed, wait until May 17. Nearby ZIP codes are in USDA hardiness zone 4b.
- May 4Last spring frost (median)50% chance of 32°F after this date
- May 17Safer planting date10% chance of 32°F after this date
- Oct 1First fall frost (median)50% chance of 32°F by this date
- 150 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 1 | May 13 | May 28 |
| 32°F | Apr 21 | May 4 | May 17 |
| 28°F | Apr 9 | Apr 24 | May 7 |
| 24°F | Apr 1 | Apr 13 | Apr 29 |
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 9 | Sep 23 | Oct 4 |
| 32°F | Sep 19 | Oct 1 | Oct 17 |
| 28°F | Sep 27 | Oct 11 | Oct 25 |
| 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 | 112 days | 132 days | 149 days |
| 32°F | 131 days | 150 days | 169 days |
| 28°F | 149 days | 170 days | 191 days |
| 24°F | 170 days | 191 days | 211 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 |
|---|---|---|---|
| 56267 | 4b | -25 to -20°F | 4 km |
| 56323 | 4b | -25 to -20°F | 13 km |
| 56244 | 4b | -25 to -20°F | 14 km |
| 56235 | 4b | -25 to -20°F | 17 km |
| 56339 | 4b | -25 to -20°F | 26 km |
| 56311 | 4b | -25 to -20°F | 34 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 USC00215638, at 45.5900, -95.8744, elevation 348 m (1,140 ft).
- Data quality: Standard (24+ years of data), 30 years of freeze data.
- Average days per year at or below 32°F: 173.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Artichoke Lake 1 E (30 km)
- Glenwood 2wnw (35 km)
- Benson (36 km)
- Alexandria Muni Airport (48 km)
- Milan 1nw (52 km)
- Wheaton (55 km)
- White Rock Dam (62 km)
- Madison Wastewater Plant (69 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.