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Will it freeze in Bemidji in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 25°F (Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST).
Tonight: forecast low 25°F. Hard freeze.
NWS forecast period: Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST.
6 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 25°F Hard freeze · Mostly Cloudy
- Fri, Nov 6 27°F Hard freeze · Partly Cloudy
- Sat, Nov 7 32°F Freeze · Mostly Clear
- Sun, Nov 8 37°F Above 36°F · Partly Cloudy
- Mon, Nov 9 33°F Frost possible · Mostly Clear
- Tue, Nov 10 31°F Freeze · Partly Cloudy
- Wed, Nov 11 32°F Freeze · 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 Bemidji
The median first fall hard-freeze date (28°F) is October 6, from NOAA’s 1991–2020 Climate Normals at Cass Lake. 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 15 · May 28 · Jun 9 | Sep 1 · Sep 17 · Sep 29 | 110 days |
| 32°F freeze | May 3 · May 17 · May 30 | Sep 12 · Sep 26 · Oct 11 | 131 days |
| 28°F hard freeze | Apr 25 · May 7 · May 20 | Sep 22 · Oct 6 · Oct 23 | 151 days |
Average high temperature by month
1991–2020 normals at Cass Lake
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 Bemidji, MN come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Cass Lake (station USC00211374, elevation 1,296 ft), 14 mi from Bemidji. 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 Bemidji
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Detroit Lakes, MN | 65 mi | May 15 | Sep 24 |
| Grand Rapids, MN | 65 mi | May 17 | Sep 24 |
| Thief River Falls, MN | 74 mi | May 14 | Sep 28 |
| Crookston, MN | 83 mi | May 11 | Sep 27 |
| Baxter, MN | 84 mi | May 8 | Sep 29 |
| Brainerd, MN | 85 mi | May 8 | Sep 29 |
| Hibbing, MN | 91 mi | Jun 5 | Sep 8 |
| Moorhead, MN | 98 mi | May 5 | Oct 3 |
| Fergus Falls, MN | 101 mi | May 4 | Oct 5 |
| Fargo, ND | 101 mi | May 4 | Oct 2 |
Frequently asked questions
When is the last frost in Bemidji?
On average, the last spring frost (32°F) in Bemidji is around May 17. In about 1 year in 10 it comes after May 30, and in 9 years in 10 it comes after May 3.
When is the first frost in Bemidji?
The first fall frost (32°F) usually arrives around September 26. There’s a 10% chance of a freeze by September 12 and a 90% chance by October 11.
Can it frost in Bemidji 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 28.
What growing zone is Bemidji?
Bemidji 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 56601. See growing zones in Minnesota.
More: all Minnesota frost dates · Minnesota growing zones · frost vs. freeze