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Will it freeze in Jackson in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 25°F (Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST).
Tonight: forecast low 25°F. Hard freeze.
NWS forecast period: Thu, Nov 5, 6:00 PM MST to Fri, Nov 6, 6:00 AM MST.
7 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 25°F Hard freeze · Partly Cloudy
- Fri, Nov 6 23°F Hard freeze · Partly Cloudy
- Sat, Nov 7 27°F Hard freeze · Mostly Clear
- Sun, Nov 8 28°F Hard freeze · Partly Cloudy
- Mon, Nov 9 30°F Freeze · Partly Cloudy
- Tue, Nov 10 30°F Freeze · Partly Cloudy
- Wed, Nov 11 31°F Freeze · 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 Jackson
The median first fall hard-freeze date (28°F) is September 13, from NOAA’s 1991–2020 Climate Normals at Moose. 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 | rare in most years | rare in most years | 38 days |
| 32°F freeze | Jun 5 · Jun 20 · Jul 9 | Aug 12 · Aug 31 · Sep 13 | 70 days |
| 28°F hard freeze | May 12 · Jun 2 · Jun 21 | Aug 30 · Sep 13 · Sep 30 | 106 days |
Average high temperature by month
1991–2020 normals at Moose
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 Jackson, WY come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Moose (station USC00486428, elevation 6,444 ft), 13 mi from Jackson. 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 Jackson
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Rexburg, ID | 57 mi | May 12 | Sep 24 |
| Rigby, ID | 58 mi | May 9 | Oct 5 |
| Ammon, ID | 60 mi | May 9 | Oct 1 |
| Idaho Falls, ID | 63 mi | May 9 | Oct 1 |
| Shelley, ID | 68 mi | May 23 | Sep 20 |
| Blackfoot, ID | 81 mi | May 5 | Oct 3 |
| Chubbuck, ID | 93 mi | May 16 | Oct 2 |
| Pocatello, ID | 94 mi | May 2 | Oct 11 |
| Preston, ID | 110 mi | May 16 | Sep 28 |
| Cody, WY | 112 mi | May 12 | Oct 1 |
Frequently asked questions
When is the last frost in Jackson?
On average, the last spring frost (32°F) in Jackson is around June 20. In about 1 year in 10 it comes after July 9, and in 9 years in 10 it comes after June 5.
When is the first frost in Jackson?
The first fall frost (32°F) usually arrives around August 31. There’s a 10% chance of a freeze by August 12 and a 90% chance by September 13.
What growing zone is Jackson?
Jackson is in USDA Plant Hardiness Zone 4b (average annual extreme minimum temperature −25 to −20°F), based on the 2023 USDA map for ZIP code 83001. See growing zones in Wyoming.
More: all Wyoming frost dates · Wyoming growing zones · frost vs. freeze