Frost dates for Grand Meadow, MN
At Grand Meadow, the median last spring frost (32°F) is May 6 and the median first fall frost is Oct 1, for a typical growing season of 146 days. For a 90% chance that the last frost has passed, wait until May 18. 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 18Safer planting date10% chance of 32°F after this date
- Oct 1First fall frost (median)50% chance of 32°F by this date
- 146 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 14 | May 26 |
| 32°F | Apr 23 | May 6 | May 18 |
| 28°F | Apr 11 | Apr 27 | May 10 |
| 24°F | Apr 2 | Apr 15 | Apr 30 |
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 22 | Oct 5 |
| 32°F | Sep 17 | Oct 1 | Oct 13 |
| 28°F | Sep 25 | Oct 9 | Oct 23 |
| 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 | 113 days | 131 days | 149 days |
| 32°F | 128 days | 146 days | 165 days |
| 28°F | 143 days | 165 days | 186 days |
| 24°F | 165 days | 186 days | 207 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 |
|---|---|---|---|
| 55936 | 4b | -25 to -20°F | 2 km |
| 55967 | 4b | -25 to -20°F | 11 km |
| 55933 | 4b | -25 to -20°F | 12 km |
| 55926 | 4b | -25 to -20°F | 12 km |
| 55961 | 4b | -25 to -20°F | 13 km |
| 55975 | 4b | -25 to -20°F | 16 km |
| 55977 | 4b | -25 to -20°F | 18 km |
| 55973 | 5a | -20 to -15°F | 20 km |
| 55951 | 4b | -25 to -20°F | 21 km |
| 55909 | 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 USC00213290, at 43.7047, -92.5644, elevation 412 m (1,350 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
- Rochester Intl Airport (23 km)
- Austin Waste Water Plant Facility (33 km)
- Preston (40 km)
- Byron 4north (43 km)
- Albert Lea 3se (60 km)
- Rushford (66 km)
- Zumbrota (67 km)
- Mabel (68 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.