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Will it freeze in Walla Walla in the next 7 nights?
No overnight lows at or below 32°F are forecast in Walla Walla 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.
1 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 35°F Frost possible · Mostly Clear
- Fri, Nov 6 42°F Above 36°F · Mostly Cloudy
- Sat, Nov 7 44°F Above 36°F · Mostly Cloudy then Chance Rain Showers
- Sun, Nov 8 38°F Above 36°F · Mostly Cloudy
- Mon, Nov 9 40°F Above 36°F · Chance Rain Showers
- Tue, Nov 10 45°F Above 36°F · Slight Chance Rain Showers
- Wed, Nov 11 45°F Above 36°F · Slight Chance Rain Showers
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 Walla Walla
The median first fall hard-freeze date (28°F) is November 14, from NOAA’s 1991–2020 Climate Normals at Walla Walla Regional Airport. 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 | Apr 2 · Apr 21 · May 8 | Oct 4 · Oct 19 · Nov 2 | 180 days |
| 32°F freeze | Mar 3 · Mar 27 · Apr 22 | Oct 15 · Oct 31 · Nov 17 | 219 days |
| 28°F hard freeze | Feb 9 · Mar 4 · Mar 27 | Oct 25 · Nov 14 · Dec 4 | 253 days |
Average high temperature by month
1991–2020 normals at Walla Walla Regional Airport
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 Walla Walla, WA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Walla Walla Regional Airport (station USW00024160, elevation 1,166 ft), 3.0 mi from Walla Walla. 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 Walla Walla
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| College Place, WA | 3.1 mi | May 2 | Oct 1 |
| Milton-Freewater, OR | 9.3 mi | Mar 25 | Oct 29 |
| Pendleton, OR | 35 mi | Apr 22 | Oct 9 |
| Pasco, WA | 40 mi | Apr 27 | Oct 11 |
| Kennewick, WA | 41 mi | Mar 28 | Oct 30 |
| Connell, WA | 47 mi | Apr 30 | Oct 12 |
| Richland, WA | 48 mi | Apr 6 | Oct 24 |
| Hermiston, OR | 48 mi | Apr 26 | Oct 10 |
| Umatilla, OR | 49 mi | Mar 30 | Nov 4 |
| La Grande, OR | 53 mi | May 6 | Oct 1 |
Frequently asked questions
When is the last frost in Walla Walla?
On average, the last spring frost (32°F) in Walla Walla is around March 27. In about 1 year in 10 it comes after April 22, and in 9 years in 10 it comes after March 3.
When is the first frost in Walla Walla?
The first fall frost (32°F) usually arrives around October 31. There’s a 10% chance of a freeze by October 15 and a 90% chance by November 17.
Can it frost in Walla Walla 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 21.
What growing zone is Walla Walla?
Walla Walla is in USDA Plant Hardiness Zone 7a (average annual extreme minimum temperature 0 to 5°F), based on the 2023 USDA map for ZIP code 99362. See growing zones in Washington.
More: all Washington frost dates · Washington growing zones · UV index today in Walla Walla · frost vs. freeze