Frost dates 2026–2027

Frost dates for Antigo, Wisconsin

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Antigo, 2.4 mi away (close match).

Last spring frostMay 14
First fall frostSep 30
139 frost-free days
Last spring frostMay 141 year in 10 after May 28
First fall frostSep 301 year in 10 by Sep 14
Growing season139 daysbetween median 32°F dates
Hardiness zoneZone 4b−25 to −20°F average extreme low

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Will it freeze in Antigo 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.

7 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 Antigo

The median first fall hard-freeze date (28°F) is October 11, from NOAA’s 1991–2020 Climate Normals at Antigo. 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 May 12 · May 27 · Jun 9 Sep 3 · Sep 20 · Oct 4 116 days
32°F freeze Apr 30 · May 14 · May 28 Sep 14 · Sep 30 · Oct 13 139 days
28°F hard freeze Apr 18 · May 1 · May 17 Sep 24 · Oct 11 · Oct 26 161 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00470239. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Antigo

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 Antigo, WI come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Antigo (station USC00470239, elevation 1,519 ft), 2.4 mi from Antigo. 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 Antigo

CityDistanceLast spring frostFirst fall frost
Weston, WI 26 mi May 6 Oct 4
Merrill, WI 27 mi May 11 Sep 30
Wausau, WI 27 mi May 6 Oct 4
Rothschild, WI 29 mi May 6 Oct 4
Kronenwetter, WI 30 mi May 6 Oct 4
Rib Mountain, WI 31 mi May 6 Oct 4
Rhinelander, WI 37 mi May 26 Sep 23
Shawano, WI 38 mi May 9 Oct 2
Stevens Point, WI 47 mi May 4 Oct 7
Plover, WI 50 mi May 4 Oct 7

Frequently asked questions

When is the last frost in Antigo?

On average, the last spring frost (32°F) in Antigo is around May 14. In about 1 year in 10 it comes after May 28, and in 9 years in 10 it comes after April 30.

When is the first frost in Antigo?

The first fall frost (32°F) usually arrives around September 30. There’s a 10% chance of a freeze by September 14 and a 90% chance by October 13.

Can it frost in Antigo 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 27.

What growing zone is Antigo?

Antigo is in USDA Plant Hardiness Zone 4b (average annual extreme minimum temperature −25 to −20°F), based on the 2023 USDA map for ZIP code 54409. See growing zones in Wisconsin.

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