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Will it freeze in Sturgeon Bay in the next 7 nights?
No overnight lows at or below 32°F are forecast in Sturgeon Bay during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 37°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST.
2 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 37°F Above 36°F · Chance Rain Showers
- Fri, Nov 6 34°F Frost possible · Mostly Cloudy
- Sat, Nov 7 36°F Frost possible · Partly Cloudy
- Sun, Nov 8 37°F Above 36°F · Partly Cloudy
- Mon, Nov 9 41°F Above 36°F · Partly Cloudy
- Tue, Nov 10 38°F Above 36°F · Partly Cloudy
- Wed, Nov 11 38°F Above 36°F · Mostly 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 Sturgeon Bay
The median first fall hard-freeze date (28°F) is October 28, from NOAA’s 1991–2020 Climate Normals at Sturgeon Bay Experiment Farm. 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 7 · May 21 · Jun 3 | Sep 17 · Oct 2 · Oct 15 | 134 days |
| 32°F freeze | Apr 25 · May 8 · May 21 | Sep 28 · Oct 13 · Oct 30 | 157 days |
| 28°F hard freeze | Apr 11 · Apr 26 · May 9 | Oct 12 · Oct 28 · Nov 11 | 183 days |
Average high temperature by month
1991–2020 normals at Sturgeon Bay Experiment Farm
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 Sturgeon Bay, WI come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Sturgeon Bay Experiment Farm (station USC00478267, elevation 699 ft), 4.3 mi from Sturgeon Bay. 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 Sturgeon Bay
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Marinette, WI | 22 mi | May 4 | Oct 11 |
| Menominee, MI | 24 mi | May 4 | Oct 11 |
| Suamico, WI | 35 mi | May 7 | Oct 9 |
| Green Bay, WI | 37 mi | May 7 | Oct 9 |
| Bellevue, WI | 38 mi | Apr 30 | Oct 9 |
| Howard, WI | 39 mi | May 7 | Oct 9 |
| Allouez, WI | 40 mi | Apr 30 | Oct 9 |
| Ashwaubenon, WI | 42 mi | Apr 30 | Oct 9 |
| De Pere, WI | 44 mi | Apr 30 | Oct 9 |
| Hobart, WI | 45 mi | May 1 | Oct 11 |
Frequently asked questions
When is the last frost in Sturgeon Bay?
On average, the last spring frost (32°F) in Sturgeon Bay is around May 8. In about 1 year in 10 it comes after May 21, and in 9 years in 10 it comes after April 25.
When is the first frost in Sturgeon Bay?
The first fall frost (32°F) usually arrives around October 13. There’s a 10% chance of a freeze by September 28 and a 90% chance by October 30.
Can it frost in Sturgeon Bay 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 21.
What growing zone is Sturgeon Bay?
Sturgeon Bay 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 54235. See growing zones in Wisconsin.
More: all Wisconsin frost dates · Wisconsin growing zones · frost vs. freeze