Frost dates for Hibbing Chisholm Hibbing Airport, MN
At Hibbing Chisholm Hibbing Airport, the median last spring frost (32°F) is Jun 5 and the median first fall frost is Sep 8, for a typical growing season of 93 days. For a 90% chance that the last frost has passed, wait until Jun 25. Nearby ZIP codes are in USDA hardiness zones 3b to 4a.
- Jun 5Last spring frost (median)50% chance of 32°F after this date
- Jun 25Safer planting date10% chance of 32°F after this date
- Sep 8First fall frost (median)50% chance of 32°F by this date
- 93 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 22 | Jun 5 | Jun 25 |
| 28°F | May 6 | May 23 | Jun 7 |
| 24°F | Apr 25 | May 7 | May 24 |
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 | Aug 23 | Sep 8 | Sep 23 |
| 28°F | Sep 4 | Sep 21 | Oct 5 |
| 24°F | Sep 16 | Oct 1 | Oct 17 |
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 | 36 days | 61 days | 87 days |
| 32°F | 67 days | 93 days | 115 days |
| 28°F | 97 days | 120 days | 142 days |
| 24°F | 121 days | 144 days | 165 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 |
|---|---|---|---|
| 55746 | 3b | -35 to -30°F | 10 km |
| 55751 | 3b | -35 to -30°F | 12 km |
| 55713 | 3b | -35 to -30°F | 13 km |
| 55719 | 3b | -35 to -30°F | 17 km |
| 55753 | 4a | -30 to -25°F | 18 km |
| 55775 | 4a | -30 to -25°F | 26 km |
| 55769 | 3b | -35 to -30°F | 28 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 USW00094931, at 47.3864, -92.8389, elevation 412 m (1,352 ft).
- Data quality: Standard (24+ years of data), 30 years of freeze data.
- Average days per year at or below 32°F: 205.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Eveleth Wastewater Plant (25 km)
- Cotton (37 km)
- Floodwood 3 NE (46 km)
- Grand Rpds Forest Lab (52 km)
- Embarrass (54 km)
- Celina 2e (55 km)
- Pokegama Dam (58 km)
- Tower 2s (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.