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Will it freeze in Geneseo in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Fri, Nov 6: 28°F (Fri, Nov 6, 6:00 PM CST to Sat, Nov 7, 6:00 AM CST).
Tonight: forecast low 39°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 39°F Above 36°F · Mostly Cloudy
- Fri, Nov 6 28°F Hard freeze · Mostly Clear
- Sat, Nov 7 33°F Frost possible · Mostly Clear
- 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 40°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 Geneseo
The median first fall hard-freeze date (28°F) is October 30, from NOAA’s 1991–2020 Climate Normals at Geneseo. 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 17 · May 1 · May 14 | Sep 25 · Oct 9 · Oct 22 | 160 days |
| 32°F freeze | Apr 6 · Apr 20 · May 6 | Oct 5 · Oct 20 · Oct 31 | 180 days |
| 28°F hard freeze | Mar 25 · Apr 9 · Apr 25 | Oct 17 · Oct 30 · Nov 11 | 202 days |
Average high temperature by month
1991–2020 normals at Geneseo
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 Geneseo, IL come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Geneseo (station USC00113384, elevation 639 ft), 0.3 mi from Geneseo. 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 Geneseo
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| East Moline, IL | 13 mi | Apr 16 | Oct 25 |
| Silvis, IL | 14 mi | Apr 16 | Oct 25 |
| Moline, IL | 17 mi | Apr 24 | Oct 18 |
| Bettendorf, IA | 19 mi | Apr 16 | Oct 25 |
| Kewanee, IL | 19 mi | Apr 24 | Oct 17 |
| Milan, IL | 21 mi | Apr 24 | Oct 18 |
| Rock Island, IL | 22 mi | Apr 24 | Oct 18 |
| Davenport, IA | 24 mi | Apr 19 | Oct 22 |
| Eldridge, IA | 25 mi | Apr 21 | Oct 17 |
| Clinton, IA | 27 mi | Apr 22 | Oct 16 |
Frequently asked questions
When is the last frost in Geneseo?
On average, the last spring frost (32°F) in Geneseo is around April 20. In about 1 year in 10 it comes after May 6, and in 9 years in 10 it comes after April 6.
When is the first frost in Geneseo?
The first fall frost (32°F) usually arrives around October 20. There’s a 10% chance of a freeze by October 5 and a 90% chance by October 31.
Can it frost in Geneseo 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 1.
What growing zone is Geneseo?
Geneseo 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 61254. See growing zones in Illinois.
More: all Illinois frost dates · Illinois growing zones · frost vs. freeze