Frost dates 2026–2027

Frost dates for Washougal, Washington

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Troutdale, 2.9 mi away (close match).

Last spring frostMar 26
First fall frostNov 17
237 frost-free days
Last spring frostMar 261 year in 10 after Apr 21
First fall frostNov 171 year in 10 by Oct 26
Growing season237 daysbetween median 32°F dates
Hardiness zoneZone 9a20 to 25°F average extreme low

Checking current alerts… View NWS forecast and alerts.

Will it freeze in Washougal in the next 7 nights?

No overnight lows at or below 32°F are forecast in Washougal 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 PST to Fri, Nov 6, 6:00 AM PST.

No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.

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 Washougal

The median first fall hard-freeze date (28°F) is December 7, from NOAA’s 1991–2020 Climate Normals at Troutdale. This is the 50% probability date, not a forecast for this year.

TemperatureLast 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 3 · Apr 24 · May 9 Oct 11 · Oct 30 · Nov 21 189 days
32°F freeze Feb 27 · Mar 26 · Apr 21 Oct 26 · Nov 17 · Dec 10 237 days
28°F hard freeze Jan 15 · Feb 22 · Mar 21 Nov 14 · Dec 7 · Jan 11 292 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00358634. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Troutdale

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 Washougal, WA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Troutdale (station USC00358634, elevation 33 ft), 2.9 mi from Washougal. 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 Washougal

CityDistanceLast spring frostFirst fall frost
Troutdale, OR 3.7 mi Mar 26 Nov 17
Camas, WA 4.3 mi Mar 16 Nov 20
Fairview, OR 5.0 mi Mar 16 Nov 20
Gresham, OR 7.5 mi Mar 16 Nov 20
Vancouver, WA 12 mi Mar 29 Nov 9
Happy Valley, OR 13 mi Mar 18 Nov 18
Sandy, OR 13 mi Mar 27 Nov 18
Portland, OR 15 mi Feb 25 Dec 1
Milwaukie, OR 16 mi Feb 25 Dec 1
Battle Ground, WA 16 mi Apr 26 Oct 16

Frequently asked questions

When is the last frost in Washougal?

On average, the last spring frost (32°F) in Washougal is around March 26. In about 1 year in 10 it comes after April 21, and in 9 years in 10 it comes after February 27.

When is the first frost in Washougal?

The first fall frost (32°F) usually arrives around November 17. There’s a 10% chance of a freeze by October 26 and a 90% chance by December 10.

Can it frost in Washougal 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 24.

What growing zone is Washougal?

Washougal is in USDA Plant Hardiness Zone 9a (average annual extreme minimum temperature 20 to 25°F), based on the 2023 USDA map for ZIP code 97060. See growing zones in Washington.

More: all Washington frost dates · Washington growing zones · frost vs. freeze