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Will it freeze in Keokuk 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 42°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 42°F Above 36°F · Cloudy
- Fri, Nov 6 31°F Freeze · Mostly Clear
- Sat, Nov 7 35°F Frost possible · Mostly Clear
- Sun, Nov 8 38°F Above 36°F · Clear
- Mon, Nov 9 43°F Above 36°F · Clear
- Tue, Nov 10 43°F Above 36°F · Partly Cloudy
- Wed, Nov 11 43°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 Keokuk
The median first fall hard-freeze date (28°F) is November 5, from NOAA’s 1991–2020 Climate Normals at Keokuk Lock Dam 19. 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 7 · Apr 22 · May 7 | Oct 1 · Oct 17 · Oct 30 | 177 days |
| 32°F freeze | Mar 30 · Apr 10 · Apr 26 | Oct 10 · Oct 27 · Nov 7 | 198 days |
| 28°F hard freeze | Mar 16 · Apr 2 · Apr 16 | Oct 24 · Nov 5 · Nov 20 | 220 days |
Average high temperature by month
1991–2020 normals at Keokuk Lock Dam 19
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 Keokuk, IA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Keokuk Lock Dam 19 (station USC00134381, elevation 527 ft), 1.7 mi from Keokuk. 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 Keokuk
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Fort Madison, IA | 15 mi | Apr 12 | Oct 25 |
| Burlington, IA | 31 mi | Apr 15 | Oct 20 |
| Quincy, IL | 33 mi | Apr 8 | Oct 30 |
| Macomb, IL | 38 mi | Apr 17 | Oct 22 |
| Mount Pleasant, IA | 39 mi | Apr 30 | Oct 10 |
| Hannibal, MO | 48 mi | Apr 10 | Oct 27 |
| Fairfield, IA | 51 mi | Apr 27 | Oct 12 |
| Monmouth, IL | 53 mi | Apr 22 | Oct 15 |
| Beardstown, IL | 58 mi | Apr 16 | Oct 23 |
| Washington, IA | 63 mi | Apr 28 | Oct 11 |
Frequently asked questions
When is the last frost in Keokuk?
On average, the last spring frost (32°F) in Keokuk is around April 10. In about 1 year in 10 it comes after April 26, and in 9 years in 10 it comes after March 30.
When is the first frost in Keokuk?
The first fall frost (32°F) usually arrives around October 27. There’s a 10% chance of a freeze by October 10 and a 90% chance by November 7.
Can it frost in Keokuk 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 22.
What growing zone is Keokuk?
Keokuk 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 52632. See growing zones in Iowa.
More: all Iowa frost dates · Iowa growing zones · frost vs. freeze