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Will it freeze in Tooele in the next 7 nights?
No overnight lows at or below 32°F are forecast in Tooele during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 38°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST.
1 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 38°F Above 36°F · Partly Cloudy
- Fri, Nov 6 36°F Frost possible · Mostly Clear
- Sat, Nov 7 40°F Above 36°F · Mostly Clear
- Sun, Nov 8 43°F Above 36°F · Mostly Clear
- Mon, Nov 9 45°F Above 36°F · Partly Cloudy
- Tue, Nov 10 42°F Above 36°F · Partly Cloudy
- Wed, Nov 11 44°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 Tooele
The median first fall hard-freeze date (28°F) is October 27, from NOAA’s 1991–2020 Climate Normals at Tooele. 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 29 · May 16 · Jun 6 | Sep 23 · Oct 6 · Oct 19 | 141 days |
| 32°F freeze | Apr 16 · May 2 · May 28 | Oct 2 · Oct 16 · Nov 2 | 165 days |
| 28°F hard freeze | Mar 29 · Apr 16 · May 7 | Oct 13 · Oct 27 · Nov 12 | 193 days |
Average high temperature by month
1991–2020 normals at Tooele
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 Tooele, UT come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Tooele (station USC00428771, elevation 4,944 ft), 0.8 mi from Tooele. 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 Tooele
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Grantsville, UT | 9.9 mi | May 2 | Oct 14 |
| Herriman, UT | 16 mi | Apr 18 | Oct 22 |
| Magna, UT | 17 mi | Apr 3 | Nov 4 |
| South Jordan, UT | 17 mi | Apr 18 | Oct 22 |
| West Jordan, UT | 17 mi | Apr 18 | Oct 22 |
| Kearns, UT | 17 mi | Apr 8 | Oct 31 |
| Riverton, UT | 18 mi | Apr 18 | Oct 22 |
| West Valley City, UT | 19 mi | Apr 8 | Oct 31 |
| Bluffdale, UT | 20 mi | Apr 18 | Oct 22 |
| Taylorsville, UT | 21 mi | Mar 31 | Nov 8 |
Frequently asked questions
When is the last frost in Tooele?
On average, the last spring frost (32°F) in Tooele is around May 2. In about 1 year in 10 it comes after May 28, and in 9 years in 10 it comes after April 16.
When is the first frost in Tooele?
The first fall frost (32°F) usually arrives around October 16. There’s a 10% chance of a freeze by October 2 and a 90% chance by November 2.
Can it frost in Tooele 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 16.
What growing zone is Tooele?
Tooele 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 84074. See growing zones in Utah.
More: all Utah frost dates · Utah growing zones · UV index today in Tooele · frost vs. freeze