Frost dates for Chaska 2nw, MN
At Chaska 2nw, the median last spring frost (32°F) is May 5 and the median first fall frost is Oct 5, for a typical growing season of 151 days. For a 90% chance that the last frost has passed, wait until May 19. Nearby ZIP codes are in USDA hardiness zone 4b.
- May 5Last spring frost (median)50% chance of 32°F after this date
- May 19Safer planting date10% chance of 32°F after this date
- Oct 5First fall frost (median)50% chance of 32°F by this date
- 151 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 4 | May 16 | May 29 |
| 32°F | Apr 21 | May 5 | May 19 |
| 28°F | Apr 8 | Apr 23 | May 6 |
| 24°F | Apr 1 | Apr 12 | Apr 26 |
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 15 | Sep 27 | Oct 8 |
| 32°F | Sep 22 | Oct 5 | Oct 18 |
| 28°F | Oct 1 | Oct 16 | Oct 28 |
| 24°F | Oct 12 | Oct 26 | Nov 8 |
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 | 115 days | 133 days | 149 days |
| 32°F | 133 days | 151 days | 169 days |
| 28°F | 155 days | 174 days | 192 days |
| 24°F | 177 days | 195 days | 212 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 |
|---|---|---|---|
| 55318 | 4b | -25 to -20°F | 0 km |
| 55386 | 4b | -25 to -20°F | 5 km |
| 55375 | 4b | -25 to -20°F | 12 km |
| 55322 | 4b | -25 to -20°F | 13 km |
| 55387 | 4b | -25 to -20°F | 13 km |
| 55368 | 4b | -25 to -20°F | 23 km |
| 55397 | 4b | -25 to -20°F | 24 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 USC00211468, at 44.8131, -93.6311, elevation 281 m (923 ft).
- Data quality: Representative (10+ years), 10 years of freeze data.
- Average days per year at or below 32°F: 161.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Chanhassen Wsfo (7 km)
- Mpls Flying Cloud Airport (13 km)
- Jordan 1ssw (18 km)
- Delano (28 km)
- New Hope (30 km)
- Minneapolis/st Paul Airport (33 km)
- Mpls Crystal Airport (35 km)
- Lower St. Anthony Falls (35 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.