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Will it freeze in Barrington 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 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 · Chance Rain Showers then Mostly Cloudy
- Fri, Nov 6 31°F Freeze · Mostly Clear
- 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 39°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 Barrington
The median first fall hard-freeze date (28°F) is October 30, from NOAA’s 1991–2020 Climate Normals at Barrington 3SW. 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 6 · May 25 | Sep 27 · Oct 11 · Oct 23 | 154 days |
| 32°F freeze | Apr 10 · Apr 25 · May 12 | Oct 5 · Oct 19 · Nov 1 | 177 days |
| 28°F hard freeze | Mar 31 · Apr 12 · Apr 30 | Oct 15 · Oct 30 · Nov 12 | 200 days |
Average high temperature by month
1991–2020 normals at Barrington 3SW
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 Barrington, IL come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Barrington 3SW (station USC00110442, elevation 875 ft), 3.1 mi from Barrington. 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 Barrington
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Inverness, IL | 3.1 mi | Apr 25 | Oct 19 |
| Lake Zurich, IL | 3.7 mi | Apr 29 | Oct 20 |
| South Barrington, IL | 4.3 mi | Apr 25 | Oct 19 |
| Lake Barrington, IL | 4.3 mi | Apr 29 | Oct 20 |
| Palatine, IL | 5.0 mi | Apr 25 | Oct 19 |
| Hoffman Estates, IL | 6.2 mi | Apr 30 | Oct 13 |
| Hawthorn Woods, IL | 6.8 mi | Apr 29 | Oct 20 |
| Long Grove, IL | 6.8 mi | Apr 29 | Oct 20 |
| Cary, IL | 7.5 mi | May 1 | Oct 11 |
| Rolling Meadows, IL | 7.5 mi | Apr 19 | Oct 26 |
Frequently asked questions
When is the last frost in Barrington?
On average, the last spring frost (32°F) in Barrington is around April 25. In about 1 year in 10 it comes after May 12, and in 9 years in 10 it comes after April 10.
When is the first frost in Barrington?
The first fall frost (32°F) usually arrives around October 19. There’s a 10% chance of a freeze by October 5 and a 90% chance by November 1.
Can it frost in Barrington 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 6.
What growing zone is Barrington?
Barrington 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 60010. See growing zones in Illinois.
More: all Illinois frost dates · Illinois growing zones · frost vs. freeze