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Will it freeze in Washington in the next 7 nights?
No overnight lows at or below 32°F are forecast in Washington 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 43°F Above 36°F · Clear
- Sat, Nov 7 45°F Above 36°F · Clear
- Sun, Nov 8 47°F Above 36°F · Mostly Clear
- Mon, Nov 9 49°F Above 36°F · Partly Cloudy
- Tue, Nov 10 47°F Above 36°F · Mostly Clear
- Wed, Nov 11 47°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 Washington
The median first fall hard-freeze date (28°F) is November 20, from NOAA’s 1991–2020 Climate Normals at St George. 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 | Mar 17 · Apr 3 · Apr 21 | Oct 19 · Nov 1 · Nov 12 | 208 days |
| 32°F freeze | Feb 27 · Mar 14 · Apr 6 | Oct 27 · Nov 10 · Nov 22 | 239 days |
| 28°F hard freeze | Feb 7 · Feb 27 · Mar 17 | Nov 7 · Nov 20 · Dec 3 | 266 days |
Average high temperature by month
1991–2020 normals at St George
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 Washington, UT come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: St George (station USC00427516, elevation 2,857 ft), 6.6 mi from Washington. 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 Washington
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| St. George, UT | 6.2 mi | Mar 14 | Nov 10 |
| Hurricane, UT | 7.5 mi | Apr 1 | Nov 5 |
| Santa Clara, UT | 9.3 mi | Mar 14 | Nov 10 |
| Ivins, UT | 11 mi | Mar 14 | Nov 10 |
| Mesquite, NV | 42 mi | Mar 16 | Nov 13 |
| Cedar City, UT | 44 mi | May 4 | Oct 13 |
| Enoch, UT | 50 mi | May 21 | Sep 29 |
| Kanab, UT | 53 mi | Apr 29 | Oct 22 |
| North Las Vegas, NV | 106 mi | Feb 1 | Dec 8 |
| Page, AZ | 109 mi | Mar 7 | Nov 15 |
Frequently asked questions
When is the last frost in Washington?
On average, the last spring frost (32°F) in Washington is around March 14. In about 1 year in 10 it comes after April 6, and in 9 years in 10 it comes after February 27.
When is the first frost in Washington?
The first fall frost (32°F) usually arrives around November 10. There’s a 10% chance of a freeze by October 27 and a 90% chance by November 22.
Can it frost in Washington 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 3.
What growing zone is Washington?
Washington is in USDA Plant Hardiness Zone 8b (average annual extreme minimum temperature 15 to 20°F), based on the 2023 USDA map for ZIP code 84780. See growing zones in Utah.
More: all Utah frost dates · Utah growing zones · UV index today in Washington · frost vs. freeze