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Will it freeze in Hartselle in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Sat, Nov 7: 32°F (Sat, Nov 7, 6:00 PM CST to Sun, Nov 8, 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.
4 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 · Areas Of Fog
- Fri, Nov 6 37°F Above 36°F · Partly Cloudy
- Sat, Nov 7 32°F Freeze · Mostly Clear
- Sun, Nov 8 33°F Frost possible · Mostly Clear
- Mon, Nov 9 36°F Frost possible · Partly Cloudy
- Tue, Nov 10 35°F Frost possible · Mostly Clear
- Wed, Nov 11 37°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 Hartselle
The median first fall hard-freeze date (28°F) is November 19, from NOAA’s 1991–2020 Climate Normals at Decatur 4SE. 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 | Mar 21 · Apr 5 · Apr 22 | Oct 16 · Oct 29 · Nov 11 | 205 days |
| 32°F freeze | Mar 5 · Mar 26 · Apr 9 | Oct 26 · Nov 7 · Nov 26 | 228 days |
| 28°F hard freeze | Feb 21 · Mar 12 · Mar 30 | Nov 4 · Nov 19 · Dec 10 | 253 days |
Average high temperature by month
1991–2020 normals at Decatur 4SE
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 Hartselle, AL come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Decatur 4SE (station USC00012209, elevation 550 ft), 9.3 mi from Hartselle. 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 Hartselle
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Decatur, AL | 9.3 mi | Mar 26 | Nov 7 |
| Triana, AL | 15 mi | Mar 24 | Nov 8 |
| Cullman, AL | 19 mi | Mar 31 | Nov 1 |
| Madison, AL | 21 mi | Mar 24 | Nov 8 |
| Huntsville, AL | 23 mi | Mar 24 | Nov 8 |
| Athens, AL | 24 mi | Mar 20 | Nov 12 |
| Arab, AL | 26 mi | Mar 19 | Nov 18 |
| Guntersville, AL | 40 mi | Mar 17 | Nov 19 |
| Oneonta, AL | 43 mi | Mar 26 | Nov 10 |
| Albertville, AL | 43 mi | Mar 17 | Nov 19 |
Frequently asked questions
When is the last frost in Hartselle?
On average, the last spring frost (32°F) in Hartselle is around March 26. In about 1 year in 10 it comes after April 9, and in 9 years in 10 it comes after March 5.
When is the first frost in Hartselle?
The first fall frost (32°F) usually arrives around November 7. There’s a 10% chance of a freeze by October 26 and a 90% chance by November 26.
Can it frost in Hartselle 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 5.
What growing zone is Hartselle?
Hartselle is in USDA Plant Hardiness Zone 8a (average annual extreme minimum temperature 10 to 15°F), based on the 2023 USDA map for ZIP code 35640. See growing zones in Alabama.
More: all Alabama frost dates · Alabama growing zones · frost vs. freeze