Frost dates 2026–2027

Frost dates for Maple Grove, Minnesota

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Mpls Crystal Airport, 6.5 mi away (close match).

Last spring frostApr 30
First fall frostOct 8
159 frost-free days
Last spring frostApr 301 year in 10 after May 17
First fall frostOct 81 year in 10 by Sep 26
Growing season159 daysbetween median 32°F dates
Hardiness zoneZone 5a−20 to −15°F average extreme low

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Will it freeze in Maple Grove 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.

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 Maple Grove

The median first fall hard-freeze date (28°F) is October 18, from NOAA’s 1991–2020 Climate Normals at Mpls Crystal 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 Apr 27 · May 9 · May 26 Sep 18 · Sep 29 · Oct 11 141 days
32°F freeze Apr 17 · Apr 30 · May 17 Sep 26 · Oct 8 · Oct 21 159 days
28°F hard freeze Apr 5 · Apr 20 · May 5 Oct 4 · Oct 18 · Nov 1 179 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USW00094960. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Mpls Crystal 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 Maple Grove, MN come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Mpls Crystal Airport (station USW00094960, elevation 861 ft), 6.5 mi from Maple Grove. 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 Maple Grove

CityDistanceLast spring frostFirst fall frost
Dayton, MN 5.6 mi May 4 Oct 5
Brooklyn Park, MN 5.6 mi Apr 30 Oct 8
Champlin, MN 5.6 mi May 5 Oct 2
Corcoran, MN 5.6 mi Apr 30 Oct 8
Plymouth, MN 6.2 mi Apr 29 Oct 12
New Hope, MN 6.2 mi Apr 29 Oct 12
Rogers, MN 7.5 mi May 4 Oct 5
Crystal, MN 7.5 mi Apr 30 Oct 8
Medina, MN 7.5 mi Apr 29 Oct 12
Brooklyn Center, MN 7.5 mi Apr 30 Oct 8

Frequently asked questions

When is the last frost in Maple Grove?

On average, the last spring frost (32°F) in Maple Grove is around April 30. In about 1 year in 10 it comes after May 17, and in 9 years in 10 it comes after April 17.

When is the first frost in Maple Grove?

The first fall frost (32°F) usually arrives around October 8. There’s a 10% chance of a freeze by September 26 and a 90% chance by October 21.

Can it frost in Maple Grove 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 9.

What growing zone is Maple Grove?

Maple Grove 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 55369. See growing zones in Minnesota.

More: all Minnesota frost dates · Minnesota growing zones · UV index today in Maple Grove · frost vs. freeze