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Will it freeze in Gurnee in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Fri, Nov 6: 32°F (Fri, Nov 6, 6:00 PM CST to Sat, Nov 7, 6:00 AM CST).
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.
3 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 · Patchy Drizzle then Mostly Cloudy
- Fri, Nov 6 32°F Freeze · Partly Cloudy
- Sat, Nov 7 34°F Frost possible · Partly Cloudy
- Sun, Nov 8 36°F Frost possible · Mostly Clear
- Mon, Nov 9 41°F Above 36°F · Mostly Clear
- Tue, Nov 10 38°F Above 36°F · Partly Cloudy
- Wed, Nov 11 39°F Above 36°F · 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 Gurnee
The median first fall hard-freeze date (28°F) is October 30, from NOAA’s 1991–2020 Climate Normals at Waukegan. 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 | Apr 25 · May 8 · May 27 | Sep 22 · Oct 8 · Oct 24 | 151 days |
| 32°F freeze | Apr 15 · Apr 30 · May 14 | Sep 30 · Oct 19 · Nov 3 | 170 days |
| 28°F hard freeze | Apr 5 · Apr 20 · May 3 | Oct 12 · Oct 30 · Nov 13 | 191 days |
Average high temperature by month
1991–2020 normals at Waukegan
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 Gurnee, IL come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Waukegan (station USC00119029, elevation 700 ft), 3.1 mi from Gurnee. 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 Gurnee
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Park City, IL | 2.5 mi | Apr 30 | Oct 19 |
| Waukegan, IL | 3.1 mi | Apr 30 | Oct 19 |
| Grayslake, IL | 5.6 mi | Apr 29 | Oct 20 |
| North Chicago, IL | 5.6 mi | Apr 30 | Oct 19 |
| Lindenhurst, IL | 5.6 mi | Apr 24 | Oct 23 |
| Beach Park, IL | 5.6 mi | Apr 30 | Oct 21 |
| Libertyville, IL | 6.2 mi | Apr 29 | Oct 20 |
| Round Lake Beach, IL | 7.5 mi | Apr 24 | Oct 23 |
| Lake Bluff, IL | 7.5 mi | Apr 30 | Oct 19 |
| Zion, IL | 7.5 mi | Apr 30 | Oct 21 |
Frequently asked questions
When is the last frost in Gurnee?
On average, the last spring frost (32°F) in Gurnee is around April 30. In about 1 year in 10 it comes after May 14, and in 9 years in 10 it comes after April 15.
When is the first frost in Gurnee?
The first fall frost (32°F) usually arrives around October 19. There’s a 10% chance of a freeze by September 30 and a 90% chance by November 3.
Can it frost in Gurnee 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 8.
What growing zone is Gurnee?
Gurnee is in USDA Plant Hardiness Zone 6a (average annual extreme minimum temperature −10 to −5°F), based on the 2023 USDA map for ZIP code 60031. See growing zones in Illinois.
More: all Illinois frost dates · Illinois growing zones · UV index today in Gurnee · frost vs. freeze