Frost dates 2026–2027

Frost dates for Hibbing, Minnesota

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Hibbing Chisholm Hibbing Airport, 5.1 mi away (close match).

Last spring frostJun 5
First fall frostSep 8
93 frost-free days
Last spring frostJun 51 year in 10 after Jun 25
First fall frostSep 81 year in 10 by Aug 23
Growing season93 daysbetween median 32°F dates
Hardiness zoneZone 3b−35 to −30°F average extreme low

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Will it freeze in Hibbing in the next 7 nights?

The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 21°F (Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST).

Tonight: forecast low 21°F. Hard freeze.

NWS forecast period: Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST.

7 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.

Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.

Frost and freeze probabilities

Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.

These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.

Average first hard freeze in Hibbing

The median first fall hard-freeze date (28°F) is September 21, from NOAA’s 1991–2020 Climate Normals at Hibbing Chisholm Hibbing Airport. This is the 50% probability date, not a forecast for this year.

TemperatureLast spring date
90% · 50% · 10% chance of a later freeze
First fall date
10% · 50% · 90% chance of an earlier freeze
Season
36°F frost possible rare in most years rare in most years 61 days
32°F freeze May 22 · Jun 5 · Jun 25 Aug 23 · Sep 8 · Sep 23 93 days
28°F hard freeze May 6 · May 23 · Jun 7 Sep 4 · Sep 21 · Oct 5 120 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USW00094931. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Hibbing Chisholm Hibbing Airport

Average low temperature by month

Months with lows near or below freezing carry frost risk

Where these frost dates come from

The frost dates for Hibbing, MN come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Hibbing Chisholm Hibbing Airport (station USW00094931, elevation 1,352 ft), 5.1 mi from Hibbing. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.

Frost dates near Hibbing

CityDistanceLast spring frostFirst fall frost
Virginia, MN 22 mi May 12 Oct 1
Grand Rapids, MN 30 mi May 17 Sep 24
Cloquet, MN 51 mi May 26 Sep 23
Hermantown, MN 53 mi May 18 Oct 1
Duluth, MN 58 mi May 14 Oct 12
Superior, WI 63 mi May 6 Oct 9
International Falls, MN 85 mi May 29 Sep 13
Bemidji, MN 91 mi May 17 Sep 26
Brainerd, MN 93 mi May 8 Sep 29
Baxter, MN 96 mi May 8 Sep 29

Frequently asked questions

When is the last frost in Hibbing?

On average, the last spring frost (32°F) in Hibbing is around June 5. In about 1 year in 10 it comes after June 25, and in 9 years in 10 it comes after May 22.

When is the first frost in Hibbing?

The first fall frost (32°F) usually arrives around September 8. There’s a 10% chance of a freeze by August 23 and a 90% chance by September 23.

What growing zone is Hibbing?

Hibbing is in USDA Plant Hardiness Zone 3b (average annual extreme minimum temperature −35 to −30°F), based on the 2023 USDA map for ZIP code 55746. See growing zones in Minnesota.

More: all Minnesota frost dates · Minnesota growing zones · frost vs. freeze