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Will it freeze in Boone 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 36°F. Frost possible.
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 36°F Frost possible · Cloudy
- Fri, Nov 6 28°F Hard freeze · Partly Cloudy
- Sat, Nov 7 35°F Frost possible · Mostly Clear
- Sun, Nov 8 38°F Above 36°F · Clear
- Mon, Nov 9 40°F Above 36°F · Mostly Clear
- Tue, Nov 10 39°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 Boone
The median first fall hard-freeze date (28°F) is October 22, from NOAA’s 1991–2020 Climate Normals at Boone. 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 25 · May 7 · May 22 | Sep 20 · Oct 1 · Oct 14 | 145 days |
| 32°F freeze | Apr 13 · Apr 28 · May 11 | Sep 28 · Oct 12 · Oct 25 | 165 days |
| 28°F hard freeze | Apr 3 · Apr 16 · Apr 30 | Oct 8 · Oct 22 · Nov 3 | 187 days |
Average high temperature by month
1991–2020 normals at Boone
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 Boone, IA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Boone (station USC00130807, elevation 1,035 ft), 1.1 mi from Boone. 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 Boone
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Ames, IA | 13 mi | Apr 26 | Oct 8 |
| Perry, IA | 19 mi | Apr 25 | Oct 10 |
| Polk City, IA | 20 mi | Apr 19 | Oct 18 |
| Nevada, IA | 21 mi | Apr 26 | Oct 12 |
| Johnston, IA | 26 mi | Apr 19 | Oct 18 |
| Grimes, IA | 26 mi | Apr 19 | Oct 18 |
| Ankeny, IA | 26 mi | Apr 23 | Oct 15 |
| Webster City, IA | 29 mi | May 3 | Oct 2 |
| Urbandale, IA | 29 mi | Apr 19 | Oct 18 |
| Clive, IA | 30 mi | Apr 18 | Oct 20 |
Frequently asked questions
When is the last frost in Boone?
On average, the last spring frost (32°F) in Boone is around April 28. In about 1 year in 10 it comes after May 11, and in 9 years in 10 it comes after April 13.
When is the first frost in Boone?
The first fall frost (32°F) usually arrives around October 12. There’s a 10% chance of a freeze by September 28 and a 90% chance by October 25.
Can it frost in Boone 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 7.
What growing zone is Boone?
Boone is in USDA Plant Hardiness Zone 5a (average annual extreme minimum temperature −20 to −15°F), based on the 2023 USDA map for ZIP code 50036. See growing zones in Iowa.
More: all Iowa frost dates · Iowa growing zones · frost vs. freeze