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Will it freeze in Fox Lake in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 31°F (Fri, Nov 6, 6:00 PM CST to Sat, Nov 7, 6:00 AM CST).
Tonight: forecast low 31°F. Freeze.
NWS forecast period: Fri, Nov 6, 6:00 PM CST to Sat, Nov 7, 6:00 AM CST.
5 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 31°F Freeze · Partly Cloudy
- Sat, Nov 7 35°F Frost possible · Partly Cloudy
- Sun, Nov 8 35°F Frost possible · Mostly Clear
- Mon, Nov 9 40°F Above 36°F · Mostly Clear
- Tue, Nov 10 36°F Frost possible · Partly Cloudy
- Wed, Nov 11 37°F Above 36°F · Mostly Cloudy
- Thu, Nov 12 35°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 Fox Lake
The median first fall hard-freeze date (28°F) is November 1, from NOAA’s 1991–2020 Climate Normals at Antioch. 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 21 · May 5 · May 23 | Sep 28 · Oct 11 · Oct 23 | 157 days |
| 32°F freeze | Apr 9 · Apr 23 · May 9 | Oct 6 · Oct 21 · Nov 3 | 179 days |
| 28°F hard freeze | Mar 30 · Apr 11 · Apr 27 | Oct 17 · Nov 1 · Nov 15 | 202 days |
Average high temperature by month
1991–2020 normals at Antioch
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 Fox Lake, IL come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Antioch (station USC00110203, elevation 750 ft), 5.7 mi from Fox Lake. 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 Fox Lake
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Spring Grove, IL | 3.1 mi | Apr 30 | Oct 13 |
| Johnsburg, IL | 4.3 mi | May 1 | Oct 11 |
| Lake Villa, IL | 5.0 mi | Apr 24 | Oct 23 |
| Round Lake Beach, IL | 6.2 mi | Apr 24 | Oct 23 |
| Lakemoor, IL | 6.2 mi | May 1 | Oct 11 |
| Antioch, IL | 6.8 mi | Apr 23 | Oct 21 |
| Volo, IL | 6.8 mi | May 1 | Oct 11 |
| Twin Lakes, WI | 6.8 mi | Apr 30 | Oct 13 |
| Round Lake, IL | 7.5 mi | Apr 29 | Oct 20 |
| Salem Lakes, WI | 8.1 mi | Apr 30 | Oct 15 |
Frequently asked questions
When is the last frost in Fox Lake?
On average, the last spring frost (32°F) in Fox Lake is around April 23. In about 1 year in 10 it comes after May 9, and in 9 years in 10 it comes after April 9.
When is the first frost in Fox Lake?
The first fall frost (32°F) usually arrives around October 21. There’s a 10% chance of a freeze by October 6 and a 90% chance by November 3.
Can it frost in Fox Lake 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 5.
What growing zone is Fox Lake?
Fox Lake 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 60020. See growing zones in Illinois.
More: all Illinois frost dates · Illinois growing zones · frost vs. freeze