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Will it freeze in Ephraim in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 31°F (Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST).
Tonight: forecast low 31°F. Freeze.
NWS forecast period: Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST.
5 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 31°F Freeze · Mostly Cloudy
- Fri, Nov 6 30°F Freeze · Mostly Clear
- Sat, Nov 7 34°F Frost possible · Clear
- Sun, Nov 8 37°F Above 36°F · Mostly Clear
- Mon, Nov 9 38°F Above 36°F · Partly Cloudy
- Tue, Nov 10 36°F Frost possible · Mostly Clear
- Wed, Nov 11 36°F Frost possible · 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 Ephraim
The median first fall hard-freeze date (28°F) is September 29, from NOAA’s 1991–2020 Climate Normals at Ephraim. 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 29 · Jun 13 · Jun 29 | Aug 28 · Sep 11 · Sep 24 | 88 days |
| 32°F freeze | May 12 · May 28 · Jun 15 | Sep 5 · Sep 20 · Oct 1 | 113 days |
| 28°F hard freeze | Apr 29 · May 12 · May 31 | Sep 15 · Sep 29 · Oct 12 | 137 days |
Average high temperature by month
1991–2020 normals at Ephraim
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 Ephraim, UT come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Ephraim (station USC00422578, elevation 5,498 ft), 0.7 mi from Ephraim. 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 Ephraim
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Nephi, UT | 27 mi | May 6 | Oct 10 |
| Santaquin, UT | 43 mi | May 4 | Oct 11 |
| Price, UT | 45 mi | May 3 | Oct 12 |
| Payson, UT | 47 mi | May 4 | Oct 11 |
| Salem, UT | 48 mi | Apr 25 | Oct 18 |
| Richfield, UT | 50 mi | May 21 | Sep 24 |
| Spanish Fork, UT | 52 mi | Apr 25 | Oct 18 |
| Mapleton, UT | 52 mi | Apr 25 | Oct 18 |
| Springville, UT | 56 mi | Apr 18 | Oct 21 |
| Provo, UT | 62 mi | Apr 18 | Oct 21 |
Frequently asked questions
When is the last frost in Ephraim?
On average, the last spring frost (32°F) in Ephraim is around May 28. In about 1 year in 10 it comes after June 15, and in 9 years in 10 it comes after May 12.
When is the first frost in Ephraim?
The first fall frost (32°F) usually arrives around September 20. There’s a 10% chance of a freeze by September 5 and a 90% chance by October 1.
Can it frost in Ephraim 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 June 13.
What growing zone is Ephraim?
Ephraim is in USDA Plant Hardiness Zone 6a (average annual extreme minimum temperature −10 to −5°F), based on the 2023 USDA map for ZIP code 84627. See growing zones in Utah.
More: all Utah frost dates · Utah growing zones · frost vs. freeze