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Will it freeze in Round Lake Beach in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Fri, Nov 6: 31°F (Fri, Nov 6, 6:00 PM CST to Sat, Nov 7, 6:00 AM CST).
Tonight: forecast low 36°F. Frost possible.
NWS forecast period: Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST.
4 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 36°F Frost possible · Chance Rain Showers then Mostly Cloudy
- Fri, Nov 6 31°F Freeze · Mostly Clear
- Sat, Nov 7 33°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 38°F Above 36°F · Partly Cloudy
- Wed, Nov 11 38°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 Round Lake Beach
The median first fall hard-freeze date (28°F) is November 3, from NOAA’s 1991–2020 Climate Normals at Lake Villa 2NE. 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 22 · May 5 · May 21 | Sep 28 · Oct 11 · Oct 25 | 157 days |
| 32°F freeze | Apr 11 · Apr 24 · May 9 | Oct 8 · Oct 23 · Nov 4 | 180 days |
| 28°F hard freeze | Mar 31 · Apr 13 · Apr 28 | Oct 20 · Nov 3 · Nov 16 | 202 days |
Average high temperature by month
1991–2020 normals at Lake Villa 2NE
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 Round Lake Beach, IL come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Lake Villa 2NE (station USC00114837, elevation 840 ft), 3.5 mi from Round Lake Beach. 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 Round Lake Beach
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Lake Villa, IL | 2.5 mi | Apr 24 | Oct 23 |
| Round Lake Park, IL | 3.1 mi | Apr 29 | Oct 20 |
| Round Lake, IL | 3.1 mi | Apr 29 | Oct 20 |
| Lindenhurst, IL | 3.7 mi | Apr 24 | Oct 23 |
| Grayslake, IL | 3.7 mi | Apr 29 | Oct 20 |
| Volo, IL | 5.6 mi | May 1 | Oct 11 |
| Fox Lake, IL | 6.2 mi | Apr 23 | Oct 21 |
| Antioch, IL | 6.8 mi | Apr 23 | Oct 21 |
| Lakemoor, IL | 6.8 mi | May 1 | Oct 11 |
| Gurnee, IL | 7.5 mi | Apr 30 | Oct 19 |
Frequently asked questions
When is the last frost in Round Lake Beach?
On average, the last spring frost (32°F) in Round Lake Beach is around April 24. In about 1 year in 10 it comes after May 9, and in 9 years in 10 it comes after April 11.
When is the first frost in Round Lake Beach?
The first fall frost (32°F) usually arrives around October 23. There’s a 10% chance of a freeze by October 8 and a 90% chance by November 4.
Can it frost in Round Lake Beach 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 Round Lake Beach?
Round Lake Beach 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 60073. See growing zones in Illinois.
More: all Illinois frost dates · Illinois growing zones · UV index today in Round Lake Beach · frost vs. freeze