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Will it freeze in Alpine in the next 7 nights?
No overnight lows at or below 32°F are forecast in Alpine during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 35°F. Frost possible.
NWS forecast period: Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST.
2 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 35°F Frost possible · Partly Cloudy
- Fri, Nov 6 33°F Frost possible · Mostly Clear
- Sat, Nov 7 38°F Above 36°F · Mostly Clear
- Sun, Nov 8 41°F Above 36°F · Mostly Clear
- Mon, Nov 9 42°F Above 36°F · Partly Cloudy
- Tue, Nov 10 40°F Above 36°F · Partly Cloudy
- Wed, Nov 11 41°F Above 36°F · Partly Cloudy
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 Alpine
The median first fall hard-freeze date (28°F) is October 24, from NOAA’s 1991–2020 Climate Normals at Alpine. 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 | May 4 · May 20 · Jun 10 | Sep 18 · Oct 1 · Oct 15 | 131 days |
| 32°F freeze | Apr 18 · May 3 · May 26 | Sep 29 · Oct 12 · Oct 26 | 159 days |
| 28°F hard freeze | Mar 29 · Apr 16 · May 5 | Oct 8 · Oct 24 · Nov 8 | 190 days |
Average high temperature by month
1991–2020 normals at Alpine
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 Alpine, UT come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Alpine (station USC00420061, elevation 5,100 ft), 0.1 mi from Alpine. 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 Alpine
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Highland, UT | 2.5 mi | May 3 | Oct 12 |
| Cedar Hills, UT | 3.7 mi | Apr 17 | Oct 25 |
| Draper, UT | 5.6 mi | Apr 18 | Oct 22 |
| American Fork, UT | 6.2 mi | Apr 17 | Oct 25 |
| Lehi, UT | 6.2 mi | Apr 30 | Oct 9 |
| Pleasant Grove, UT | 6.8 mi | Apr 17 | Oct 25 |
| Sandy, UT | 8.7 mi | Apr 29 | Oct 22 |
| White City, UT | 8.7 mi | Apr 29 | Oct 22 |
| Lindon, UT | 8.7 mi | Apr 17 | Oct 25 |
| Bluffdale, UT | 8.7 mi | Apr 18 | Oct 22 |
Frequently asked questions
When is the last frost in Alpine?
On average, the last spring frost (32°F) in Alpine is around May 3. In about 1 year in 10 it comes after May 26, and in 9 years in 10 it comes after April 18.
When is the first frost in Alpine?
The first fall frost (32°F) usually arrives around October 12. There’s a 10% chance of a freeze by September 29 and a 90% chance by October 26.
Can it frost in Alpine 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 20.
What growing zone is Alpine?
Alpine is in USDA Plant Hardiness Zone 7a (average annual extreme minimum temperature 0 to 5°F), based on the 2023 USDA map for ZIP code 84004. See growing zones in Utah.
More: all Utah frost dates · Utah growing zones · frost vs. freeze