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Will it freeze in Magna in the next 7 nights?
No overnight lows at or below 32°F are forecast in Magna during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 43°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 43°F Above 36°F · Partly Cloudy
- Fri, Nov 6 42°F Above 36°F · Mostly Clear
- Sat, Nov 7 44°F Above 36°F · Mostly Clear
- Sun, Nov 8 47°F Above 36°F · Partly Cloudy
- Mon, Nov 9 48°F Above 36°F · Mostly Cloudy
- Tue, Nov 10 46°F Above 36°F · Partly Cloudy
- Wed, Nov 11 47°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 Magna
The median first fall hard-freeze date (28°F) is November 13, from NOAA’s 1991–2020 Climate Normals at Garfield. 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 2 · Apr 19 · May 5 | Oct 9 · Oct 23 · Nov 7 | 185 days |
| 32°F freeze | Mar 11 · Apr 3 · Apr 19 | Oct 18 · Nov 4 · Nov 17 | 213 days |
| 28°F hard freeze | Feb 20 · Mar 11 · Apr 6 | Oct 27 · Nov 13 · Nov 28 | 244 days |
Average high temperature by month
1991–2020 normals at Garfield
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 Magna, UT come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Garfield (station USC00423097, elevation 4,298 ft), 2.5 mi from Magna. 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 Magna
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| West Valley City, UT | 9.9 mi | Apr 8 | Oct 31 |
| Kearns, UT | 12 mi | Apr 8 | Oct 31 |
| Salt Lake City, UT | 13 mi | Mar 31 | Nov 8 |
| Taylorsville, UT | 14 mi | Mar 31 | Nov 8 |
| West Jordan, UT | 14 mi | Apr 18 | Oct 22 |
| North Salt Lake, UT | 15 mi | Apr 24 | Oct 19 |
| South Salt Lake, UT | 16 mi | Mar 31 | Nov 8 |
| Woods Cross, UT | 16 mi | Apr 24 | Oct 19 |
| Tooele, UT | 17 mi | May 2 | Oct 16 |
| Murray, UT | 17 mi | Apr 29 | Oct 22 |
Frequently asked questions
When is the last frost in Magna?
On average, the last spring frost (32°F) in Magna is around April 3. In about 1 year in 10 it comes after April 19, and in 9 years in 10 it comes after March 11.
When is the first frost in Magna?
The first fall frost (32°F) usually arrives around November 4. There’s a 10% chance of a freeze by October 18 and a 90% chance by November 17.
Can it frost in Magna 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 19.
What growing zone is Magna?
Magna is in USDA Plant Hardiness Zone 7b (average annual extreme minimum temperature 5 to 10°F), based on the 2023 USDA map for ZIP code 84044. See growing zones in Utah.
More: all Utah frost dates · Utah growing zones · UV index today in Magna · frost vs. freeze