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Will it freeze in Quincy 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 43°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 43°F Above 36°F · Slight Chance Drizzle then Cloudy
- Fri, Nov 6 32°F Freeze · Mostly Clear
- Sat, Nov 7 36°F Frost possible · Mostly Clear
- Sun, Nov 8 38°F Above 36°F · Clear
- Mon, Nov 9 44°F Above 36°F · Clear
- Tue, Nov 10 44°F Above 36°F · Mostly Clear
- Wed, Nov 11 44°F Above 36°F · Mostly Clear
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 Quincy
The median first fall hard-freeze date (28°F) is November 8, from NOAA’s 1991–2020 Climate Normals at Quincy Dam 21. 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 5 · Apr 19 · May 4 | Oct 5 · Oct 20 · Oct 31 | 183 days |
| 32°F freeze | Mar 24 · Apr 8 · Apr 23 | Oct 17 · Oct 30 · Nov 10 | 204 days |
| 28°F hard freeze | Mar 12 · Mar 30 · Apr 14 | Oct 28 · Nov 8 · Nov 23 | 224 days |
Average high temperature by month
1991–2020 normals at Quincy Dam 21
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 Quincy, IL come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Quincy Dam 21 (station USC00117077, elevation 483 ft), 3.4 mi from Quincy. 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 Quincy
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Hannibal, MO | 16 mi | Apr 10 | Oct 27 |
| Keokuk, IA | 33 mi | Apr 10 | Oct 27 |
| Fort Madison, IA | 48 mi | Apr 12 | Oct 25 |
| Beardstown, IL | 50 mi | Apr 16 | Oct 23 |
| Macomb, IL | 52 mi | Apr 17 | Oct 22 |
| Macon, MO | 60 mi | Apr 8 | Oct 28 |
| Mexico, MO | 60 mi | Apr 11 | Oct 25 |
| Burlington, IA | 62 mi | Apr 15 | Oct 20 |
| Jacksonville, IL | 63 mi | Apr 17 | Oct 21 |
| Kirksville, MO | 66 mi | Apr 21 | Oct 19 |
Frequently asked questions
When is the last frost in Quincy?
On average, the last spring frost (32°F) in Quincy is around April 8. In about 1 year in 10 it comes after April 23, and in 9 years in 10 it comes after March 24.
When is the first frost in Quincy?
The first fall frost (32°F) usually arrives around October 30. There’s a 10% chance of a freeze by October 17 and a 90% chance by November 10.
Can it frost in Quincy 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 April 19.
What growing zone is Quincy?
Quincy 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 62301. See growing zones in Illinois.
More: all Illinois frost dates · Illinois growing zones · UV index today in Quincy · frost vs. freeze