Frost dates 2026–2027

Frost dates for Colville, Washington

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Colville, 2.3 mi away (close match).

Last spring frostMay 2
First fall frostOct 2
153 frost-free days
Last spring frostMay 21 year in 10 after May 17
First fall frostOct 21 year in 10 by Sep 19
Growing season153 daysbetween median 32°F dates
Hardiness zoneZone 6a−10 to −5°F average extreme low

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Will it freeze in Colville in the next 7 nights?

The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 31°F (Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST).

Tonight: forecast low 31°F. Freeze.

NWS forecast period: Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST.

7 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.

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 Colville

The median first fall hard-freeze date (28°F) is October 14, from NOAA’s 1991–2020 Climate Normals at Colville. 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 May 3 · May 17 · Jun 3 Sep 6 · Sep 22 · Oct 4 127 days
32°F freeze Apr 19 · May 2 · May 17 Sep 19 · Oct 2 · Oct 17 153 days
28°F hard freeze Mar 25 · Apr 15 · May 2 Oct 1 · Oct 14 · Nov 2 183 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00451630. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Colville

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 Colville, WA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Colville (station USC00451630, elevation 1,554 ft), 2.3 mi from Colville. 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 Colville

CityDistanceLast spring frostFirst fall frost
Deer Park, WA 45 mi May 22 Sep 14
Airway Heights, WA 64 mi Apr 26 Oct 12
Sandpoint, ID 64 mi May 8 Sep 28
Spokane, WA 65 mi Apr 26 Oct 15
Spokane Valley, WA 68 mi Apr 26 Oct 15
Rathdrum, ID 70 mi Apr 22 Oct 18
Liberty Lake, WA 71 mi Apr 26 Oct 15
Post Falls, ID 71 mi Apr 22 Oct 18
Hayden, ID 74 mi Apr 22 Oct 18
Cheney, WA 75 mi May 30 Sep 4

Frequently asked questions

When is the last frost in Colville?

On average, the last spring frost (32°F) in Colville is around May 2. In about 1 year in 10 it comes after May 17, and in 9 years in 10 it comes after April 19.

When is the first frost in Colville?

The first fall frost (32°F) usually arrives around October 2. There’s a 10% chance of a freeze by September 19 and a 90% chance by October 17.

Can it frost in Colville 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 May 17.

What growing zone is Colville?

Colville is in USDA Plant Hardiness Zone 6a (average annual extreme minimum temperature −10 to −5°F), based on the 2023 USDA map for ZIP code 99114. See growing zones in Washington.

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