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Will it freeze in Preston in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 30°F (Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST).
Tonight: forecast low 30°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 30°F Freeze · Areas Of Fog
- Fri, Nov 6 30°F Freeze · Mostly Clear
- Sat, Nov 7 33°F Frost possible · Mostly Clear
- Sun, Nov 8 35°F Frost possible · Mostly Clear
- Mon, Nov 9 37°F Above 36°F · Partly Cloudy
- Tue, Nov 10 36°F Frost possible · Mostly Clear
- Wed, Nov 11 37°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 Preston
The median first fall hard-freeze date (28°F) is October 10, from NOAA’s 1991–2020 Climate Normals at Preston. 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 16 · Jun 3 · Jun 19 | Sep 3 · Sep 17 · Oct 1 | 102 days |
| 32°F freeze | May 2 · May 16 · Jun 4 | Sep 14 · Sep 28 · Oct 14 | 133 days |
| 28°F hard freeze | Apr 13 · Apr 30 · May 13 | Sep 26 · Oct 10 · Oct 26 | 164 days |
Average high temperature by month
1991–2020 normals at Preston
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 Preston, ID come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Preston (station USC00107346, elevation 4,719 ft), 0.4 mi from Preston. 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 Preston
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Smithfield, UT | 19 mi | May 8 | Oct 2 |
| Hyde Park, UT | 21 mi | May 8 | Oct 2 |
| North Logan, UT | 23 mi | Apr 30 | Oct 16 |
| Logan, UT | 25 mi | May 8 | Oct 2 |
| Providence, UT | 27 mi | Apr 30 | Oct 16 |
| Nibley, UT | 29 mi | May 12 | Sep 28 |
| Tremonton, UT | 30 mi | Apr 24 | Oct 17 |
| Hyrum, UT | 32 mi | May 12 | Sep 28 |
| Brigham City, UT | 42 mi | May 5 | Oct 5 |
| Perry, UT | 45 mi | May 5 | Oct 5 |
Frequently asked questions
When is the last frost in Preston?
On average, the last spring frost (32°F) in Preston is around May 16. In about 1 year in 10 it comes after June 4, and in 9 years in 10 it comes after May 2.
When is the first frost in Preston?
The first fall frost (32°F) usually arrives around September 28. There’s a 10% chance of a freeze by September 14 and a 90% chance by October 14.
Can it frost in Preston 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 3.
What growing zone is Preston?
Preston 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 83232. See growing zones in Idaho.
More: all Idaho frost dates · Idaho growing zones · frost vs. freeze