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Will it freeze in Marinette in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Fri, Nov 6: 26°F (Fri, Nov 6, 6:00 PM CST to Sat, Nov 7, 6:00 AM CST).
Tonight: forecast low 35°F. Frost possible.
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 35°F Frost possible · Chance Rain Showers
- Fri, Nov 6 26°F Hard freeze · Partly Cloudy
- Sat, Nov 7 29°F Freeze · Mostly Clear
- Sun, Nov 8 32°F Freeze · Mostly Clear
- Mon, Nov 9 37°F Above 36°F · Mostly Clear
- Tue, Nov 10 34°F Frost possible · Partly Cloudy
- Wed, Nov 11 34°F Frost possible · Partly Cloudy
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 Marinette
The median first fall hard-freeze date (28°F) is October 27, from NOAA’s 1991–2020 Climate Normals at Marinette. 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 1 · May 16 · May 29 | Sep 20 · Oct 1 · Oct 13 | 139 days |
| 32°F freeze | Apr 19 · May 4 · May 20 | Sep 29 · Oct 11 · Oct 29 | 160 days |
| 28°F hard freeze | Apr 7 · Apr 22 · May 10 | Oct 9 · Oct 27 · Nov 10 | 186 days |
Average high temperature by month
1991–2020 normals at Marinette
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 Marinette, WI come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Marinette (station USC00475091, elevation 589 ft), 0.9 mi from Marinette. 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 Marinette
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Menominee, MI | 2.5 mi | May 4 | Oct 11 |
| Sturgeon Bay, WI | 22 mi | May 8 | Oct 13 |
| Suamico, WI | 37 mi | May 7 | Oct 9 |
| Howard, WI | 42 mi | May 7 | Oct 9 |
| Green Bay, WI | 43 mi | May 7 | Oct 9 |
| Bellevue, WI | 46 mi | Apr 30 | Oct 9 |
| Allouez, WI | 47 mi | Apr 30 | Oct 9 |
| Ashwaubenon, WI | 47 mi | Apr 30 | Oct 9 |
| Hobart, WI | 48 mi | May 1 | Oct 11 |
| De Pere, WI | 50 mi | Apr 30 | Oct 9 |
Frequently asked questions
When is the last frost in Marinette?
On average, the last spring frost (32°F) in Marinette is around May 4. In about 1 year in 10 it comes after May 20, and in 9 years in 10 it comes after April 19.
When is the first frost in Marinette?
The first fall frost (32°F) usually arrives around October 11. There’s a 10% chance of a freeze by September 29 and a 90% chance by October 29.
Can it frost in Marinette 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 16.
What growing zone is Marinette?
Marinette is in USDA Plant Hardiness Zone 5b (average annual extreme minimum temperature −15 to −10°F), based on the 2023 USDA map for ZIP code 54143. See growing zones in Wisconsin.
More: all Wisconsin frost dates · Wisconsin growing zones · frost vs. freeze