Frost dates 2026–2027

Frost dates for Albert Lea, Minnesota

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Albert Lea 3SE, 4.5 mi away (close match).

Last spring frostApr 27
First fall frostOct 9
164 frost-free days
Last spring frostApr 271 year in 10 after May 10
First fall frostOct 91 year in 10 by Sep 26
Growing season164 daysbetween median 32°F dates
Hardiness zoneZone 5a−20 to −15°F average extreme low

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Will it freeze in Albert Lea in the next 7 nights?

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

Tonight: forecast low 32°F. 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.

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 Albert Lea

The median first fall hard-freeze date (28°F) is October 19, from NOAA’s 1991–2020 Climate Normals at Albert Lea 3SE. 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 Apr 24 · May 7 · May 20 Sep 18 · Oct 1 · Oct 14 147 days
32°F freeze Apr 12 · Apr 27 · May 10 Sep 26 · Oct 9 · Oct 23 164 days
28°F hard freeze Apr 2 · Apr 15 · Apr 30 Oct 5 · Oct 19 · Nov 1 186 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00210075. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Albert Lea 3SE

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 Albert Lea, MN come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Albert Lea 3SE (station USC00210075, elevation 1,230 ft), 4.5 mi from Albert Lea. 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 Albert Lea

CityDistanceLast spring frostFirst fall frost
Austin, MN 19 mi Apr 30 Oct 5
Waseca, MN 30 mi May 2 Oct 4
Owatonna, MN 31 mi May 5 Oct 6
Clear Lake, IA 36 mi May 3 Oct 1
Mason City, IA 36 mi Apr 29 Oct 7
Kasson, MN 40 mi May 12 Sep 28
Byron, MN 45 mi May 12 Sep 28
Faribault, MN 45 mi May 5 Oct 5
Stewartville, MN 46 mi Apr 30 Oct 6
Mankato, MN 47 mi Apr 30 Oct 9

Frequently asked questions

When is the last frost in Albert Lea?

On average, the last spring frost (32°F) in Albert Lea is around April 27. In about 1 year in 10 it comes after May 10, and in 9 years in 10 it comes after April 12.

When is the first frost in Albert Lea?

The first fall frost (32°F) usually arrives around October 9. There’s a 10% chance of a freeze by September 26 and a 90% chance by October 23.

Can it frost in Albert Lea 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 7.

What growing zone is Albert Lea?

Albert Lea 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 56007. See growing zones in Minnesota.

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