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Will it freeze in Pullman in the next 7 nights?
No overnight lows at or below 32°F are forecast in Pullman during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 35°F. Frost possible.
NWS forecast period: Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST.
2 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 35°F Frost possible · Patchy Fog then Mostly Clear
- Fri, Nov 6 38°F Above 36°F · Mostly Cloudy
- Sat, Nov 7 41°F Above 36°F · Mostly Cloudy then Slight Chance Light Rain
- Sun, Nov 8 36°F Frost possible · Mostly Cloudy
- Mon, Nov 9 37°F Above 36°F · Mostly Cloudy then Chance Light Rain
- Tue, Nov 10 40°F Above 36°F · Slight Chance Light Rain
- Wed, Nov 11 41°F Above 36°F · Slight Chance Light Rain
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 Pullman
The median first fall hard-freeze date (28°F) is October 12, from NOAA’s 1991–2020 Climate Normals at Pullman 2 NW. 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 12 · Jun 1 · Jul 1 | Aug 24 · Sep 11 · Sep 29 | 99 days |
| 32°F freeze | Apr 22 · May 6 · May 25 | Sep 9 · Sep 29 · Oct 15 | 143 days |
| 28°F hard freeze | Mar 27 · Apr 19 · May 7 | Sep 26 · Oct 12 · Nov 2 | 178 days |
Average high temperature by month
1991–2020 normals at Pullman 2 NW
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 Pullman, WA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Pullman 2 NW (station USC00456789, elevation 2,515 ft), 2.1 mi from Pullman. 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 Pullman
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Moscow, ID | 8.1 mi | Apr 29 | Oct 2 |
| Clarkston, WA | 22 mi | Apr 6 | Oct 26 |
| Lewiston, ID | 25 mi | Apr 6 | Oct 26 |
| Cheney, WA | 56 mi | May 30 | Sep 4 |
| Spokane Valley, WA | 65 mi | Apr 26 | Oct 15 |
| Liberty Lake, WA | 65 mi | Apr 26 | Oct 15 |
| Spokane, WA | 66 mi | Apr 26 | Oct 15 |
| Airway Heights, WA | 66 mi | Apr 26 | Oct 12 |
| Coeur d'Alene, ID | 69 mi | Apr 22 | Oct 18 |
| Post Falls, ID | 70 mi | Apr 22 | Oct 18 |
Frequently asked questions
When is the last frost in Pullman?
On average, the last spring frost (32°F) in Pullman is around May 6. In about 1 year in 10 it comes after May 25, and in 9 years in 10 it comes after April 22.
When is the first frost in Pullman?
The first fall frost (32°F) usually arrives around September 29. There’s a 10% chance of a freeze by September 9 and a 90% chance by October 15.
Can it frost in Pullman 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 1.
What growing zone is Pullman?
Pullman is in USDA Plant Hardiness Zone 6b (average annual extreme minimum temperature −5 to 0°F), based on the 2023 USDA map for ZIP code 99163. See growing zones in Washington.
More: all Washington frost dates · Washington growing zones · UV index today in Pullman · frost vs. freeze