Checking current alerts… View NWS forecast and alerts.
Will it freeze in Brigham City in the next 7 nights?
No overnight lows at or below 32°F are forecast in Brigham City during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 34°F. Frost possible.
NWS forecast period: Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST.
3 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 34°F Frost possible · Partly Cloudy
- Fri, Nov 6 33°F Frost possible · Mostly Clear
- Sat, Nov 7 36°F Frost possible · Mostly Clear
- Sun, Nov 8 38°F Above 36°F · Mostly Clear
- Mon, Nov 9 40°F Above 36°F · Partly Cloudy
- Tue, Nov 10 39°F Above 36°F · Partly Cloudy
- Wed, Nov 11 40°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 Brigham City
The median first fall hard-freeze date (28°F) is October 17, from NOAA’s 1991–2020 Climate Normals at Brigham City Waste Plt. 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 5 · May 23 · Jun 11 | Sep 9 · Sep 24 · Oct 8 | 122 days |
| 32°F freeze | Apr 20 · May 5 · May 29 | Sep 20 · Oct 5 · Oct 19 | 150 days |
| 28°F hard freeze | Mar 31 · Apr 18 · May 5 | Oct 1 · Oct 17 · Nov 1 | 181 days |
Average high temperature by month
1991–2020 normals at Brigham City Waste Plt
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 Brigham City, UT come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Brigham City Waste Plt (station USC00420928, elevation 4,240 ft), 1.3 mi from Brigham City. 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 Brigham City
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Perry, UT | 3.1 mi | May 5 | Oct 5 |
| Pleasant View, UT | 13 mi | Apr 21 | Oct 23 |
| Hyrum, UT | 14 mi | May 12 | Sep 28 |
| Plain City, UT | 14 mi | Apr 22 | Oct 18 |
| North Ogden, UT | 14 mi | Apr 19 | Oct 22 |
| Farr West, UT | 14 mi | Apr 22 | Oct 18 |
| Harrisville, UT | 16 mi | Apr 21 | Oct 23 |
| Nibley, UT | 16 mi | May 12 | Sep 28 |
| Tremonton, UT | 16 mi | Apr 24 | Oct 17 |
| Providence, UT | 19 mi | Apr 30 | Oct 16 |
Frequently asked questions
When is the last frost in Brigham City?
On average, the last spring frost (32°F) in Brigham City is around May 5. In about 1 year in 10 it comes after May 29, and in 9 years in 10 it comes after April 20.
When is the first frost in Brigham City?
The first fall frost (32°F) usually arrives around October 5. There’s a 10% chance of a freeze by September 20 and a 90% chance by October 19.
Can it frost in Brigham City 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 23.
What growing zone is Brigham City?
Brigham City is in USDA Plant Hardiness Zone 6b (average annual extreme minimum temperature −5 to 0°F), based on the 2023 USDA map for ZIP code 84302. See growing zones in Utah.
More: all Utah frost dates · Utah growing zones · frost vs. freeze