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Will it freeze in Crookston in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 24°F (Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST).
Tonight: forecast low 24°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.
- Tonight 24°F Hard freeze · Mostly Cloudy
- Fri, Nov 6 26°F Hard freeze · Partly Cloudy
- Sat, Nov 7 30°F Freeze · Mostly Clear
- Sun, Nov 8 36°F Frost possible · Partly Cloudy
- Mon, Nov 9 31°F Freeze · Mostly Clear
- Tue, Nov 10 30°F Freeze · Mostly Clear
- Wed, Nov 11 31°F Freeze · Partly Cloudy
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 Crookston
The median first fall hard-freeze date (28°F) is October 7, from NOAA’s 1991–2020 Climate Normals at Crookston NW Experiment Station. This is the 50% probability date, not a forecast for this year.
| Temperature | Last 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 | May 7 · May 22 · Jun 3 | Sep 3 · Sep 17 · Sep 28 | 118 days |
| 32°F freeze | Apr 28 · May 11 · May 25 | Sep 14 · Sep 27 · Oct 10 | 138 days |
| 28°F hard freeze | Apr 18 · May 1 · May 16 | Sep 23 · Oct 7 · Oct 23 | 157 days |
Average high temperature by month
1991–2020 normals at Crookston NW Experiment Station
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 Crookston, MN come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Crookston NW Experiment Station (station USC00211891, elevation 891 ft), 3.0 mi from Crookston. 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 Crookston
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| East Grand Forks, MN | 22 mi | May 10 | Oct 1 |
| Grand Forks, ND | 24 mi | May 10 | Oct 1 |
| Thief River Falls, MN | 30 mi | May 14 | Sep 28 |
| Moorhead, MN | 63 mi | May 5 | Oct 3 |
| Fargo, ND | 64 mi | May 4 | Oct 2 |
| West Fargo, ND | 65 mi | May 4 | Oct 2 |
| Horace, ND | 71 mi | May 4 | Oct 2 |
| Detroit Lakes, MN | 76 mi | May 15 | Sep 24 |
| Bemidji, MN | 83 mi | May 17 | Sep 26 |
| Valley City, ND | 88 mi | May 13 | Sep 26 |
Frequently asked questions
When is the last frost in Crookston?
On average, the last spring frost (32°F) in Crookston is around May 11. In about 1 year in 10 it comes after May 25, and in 9 years in 10 it comes after April 28.
When is the first frost in Crookston?
The first fall frost (32°F) usually arrives around September 27. There’s a 10% chance of a freeze by September 14 and a 90% chance by October 10.
Can it frost in Crookston after the last frost date?
Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after May 22.
What growing zone is Crookston?
Crookston is in USDA Plant Hardiness Zone 4a (average annual extreme minimum temperature −30 to −25°F), based on the 2023 USDA map for ZIP code 56716. See growing zones in Minnesota.
More: all Minnesota frost dates · Minnesota growing zones · frost vs. freeze