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Will it freeze in Alliance in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 29°F (Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST).
Tonight: forecast low 29°F. Freeze.
NWS forecast period: Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST.
4 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 29°F Freeze · Mostly Clear
- Fri, Nov 6 35°F Frost possible · Mostly Clear
- Sat, Nov 7 33°F Frost possible · Mostly Clear
- Sun, Nov 8 39°F Above 36°F · Mostly Clear
- Mon, Nov 9 36°F Frost possible · Partly Cloudy
- Tue, Nov 10 37°F Above 36°F · Partly Cloudy
- Wed, Nov 11 38°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 Alliance
The median first fall hard-freeze date (28°F) is October 12, from NOAA’s 1991–2020 Climate Normals at Alliance 1WNW. 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 7 · May 21 · Jun 7 | Sep 10 · Sep 24 · Oct 6 | 124 days |
| 32°F freeze | Apr 28 · May 11 · May 28 | Sep 21 · Oct 3 · Oct 13 | 144 days |
| 28°F hard freeze | Apr 17 · May 1 · May 16 | Sep 30 · Oct 12 · Oct 22 | 163 days |
Average high temperature by month
1991–2020 normals at Alliance 1WNW
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 Alliance, NE come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Alliance 1WNW (station USC00250130, elevation 3,994 ft), 1.2 mi from Alliance. 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 Alliance
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Scottsbluff, NE | 43 mi | May 8 | Oct 3 |
| Gering, NE | 45 mi | May 8 | Oct 3 |
| Torrington, WY | 66 mi | May 11 | Sep 29 |
| Sidney, NE | 67 mi | May 15 | Sep 30 |
| Sterling, CO | 104 mi | Apr 30 | Oct 9 |
| Cheyenne, WY | 120 mi | May 14 | Oct 1 |
| North Platte, NE | 129 mi | May 11 | Oct 1 |
| Brush, CO | 134 mi | May 6 | Oct 6 |
| Douglas, WY | 136 mi | May 19 | Sep 23 |
| Fort Morgan, CO | 136 mi | May 6 | Oct 6 |
Frequently asked questions
When is the last frost in Alliance?
On average, the last spring frost (32°F) in Alliance is around May 11. In about 1 year in 10 it comes after May 28, and in 9 years in 10 it comes after April 28.
When is the first frost in Alliance?
The first fall frost (32°F) usually arrives around October 3. There’s a 10% chance of a freeze by September 21 and a 90% chance by October 13.
Can it frost in Alliance 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 21.
What growing zone is Alliance?
Alliance 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 69301. See growing zones in Nebraska.
More: all Nebraska frost dates · Nebraska growing zones · frost vs. freeze