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Will it freeze in Fairmont in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 31°F (Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST).
Tonight: forecast low 31°F. Freeze.
NWS forecast period: Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST.
4 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 31°F Freeze · Mostly Cloudy
- Fri, Nov 6 27°F Hard freeze · Partly Cloudy then Patchy Fog
- Sat, Nov 7 34°F Frost possible · Mostly Clear
- Sun, Nov 8 37°F Above 36°F · Mostly Clear
- Mon, Nov 9 37°F Above 36°F · Mostly Clear
- Tue, Nov 10 36°F Frost possible · Partly Cloudy
- Wed, Nov 11 37°F Above 36°F · Mostly Clear
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 Fairmont
The median first fall hard-freeze date (28°F) is October 24, from NOAA’s 1991–2020 Climate Normals at Fairmont. 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 | Apr 21 · May 4 · May 15 | Sep 22 · Oct 4 · Oct 17 | 152 days |
| 32°F freeze | Apr 12 · Apr 25 · May 6 | Sep 30 · Oct 14 · Oct 26 | 171 days |
| 28°F hard freeze | Apr 3 · Apr 16 · Apr 28 | Oct 11 · Oct 24 · Nov 5 | 189 days |
Average high temperature by month
1991–2020 normals at Fairmont
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 Fairmont, MN come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Fairmont (station USC00212698, elevation 1,187 ft), 0.1 mi from Fairmont. 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 Fairmont
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Estherville, IA | 25 mi | May 2 | Oct 3 |
| Spirit Lake, IA | 36 mi | Apr 28 | Oct 11 |
| Algona, IA | 41 mi | Apr 30 | Oct 6 |
| North Mankato, MN | 43 mi | Apr 30 | Oct 9 |
| Mankato, MN | 43 mi | Apr 30 | Oct 9 |
| New Ulm, MN | 46 mi | Apr 29 | Oct 7 |
| Spencer, IA | 48 mi | May 1 | Oct 3 |
| St. Peter, MN | 53 mi | May 2 | Oct 4 |
| Albert Lea, MN | 55 mi | Apr 27 | Oct 9 |
| Waseca, MN | 57 mi | May 2 | Oct 4 |
Frequently asked questions
When is the last frost in Fairmont?
On average, the last spring frost (32°F) in Fairmont is around April 25. In about 1 year in 10 it comes after May 6, and in 9 years in 10 it comes after April 12.
When is the first frost in Fairmont?
The first fall frost (32°F) usually arrives around October 14. There’s a 10% chance of a freeze by September 30 and a 90% chance by October 26.
Can it frost in Fairmont 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 4.
What growing zone is Fairmont?
Fairmont is in USDA Plant Hardiness Zone 5a (average annual extreme minimum temperature −20 to −15°F), based on the 2023 USDA map for ZIP code 56031. See growing zones in Minnesota.
More: all Minnesota frost dates · Minnesota growing zones · frost vs. freeze