Frost dates for Floodwood 3 NE, MN
At Floodwood 3 NE, the median last spring frost (32°F) is May 29 and the median first fall frost is Sep 18, for a typical growing season of 111 days. For a 90% chance that the last frost has passed, wait until Jun 13. Nearby ZIP codes are in USDA hardiness zones 3b to 4a.
- May 29Last spring frost (median)50% chance of 32°F after this date
- Jun 13Safer planting date10% chance of 32°F after this date
- Sep 18First fall frost (median)50% chance of 32°F by this date
- 111 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 |
|---|---|---|---|
| 32°F | May 14 | May 29 | Jun 13 |
| 28°F | Apr 30 | May 16 | May 31 |
| 24°F | Apr 19 | May 2 | May 20 |
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 |
|---|---|---|---|
| 32°F | Sep 1 | Sep 18 | Oct 2 |
| 28°F | Sep 12 | Sep 29 | Oct 13 |
| 24°F | Sep 24 | Oct 10 | Oct 27 |
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 | 59 days | 85 days | 108 days |
| 32°F | 90 days | 111 days | 131 days |
| 28°F | 112 days | 133 days | 155 days |
| 24°F | 135 days | 158 days | 180 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 |
|---|---|---|---|
| 55736 | 4a | -30 to -25°F | 4 km |
| 55765 | 3b | -35 to -30°F | 17 km |
| 55702 | 4a | -30 to -25°F | 18 km |
| 55784 | 4a | -30 to -25°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 USC00212842, at 46.9728, -92.8700, elevation 384 m (1,260 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 200.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Wright 3 E (33 km)
- Cotton (38 km)
- Sandy Lake Dam Libby (40 km)
- Cloquet (40 km)
- Hibbing Chisholm Hibbing Airport (46 km)
- Duluth NWS (52 km)
- Duluth (52 km)
- Grand Rpds Forest Lab (56 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.