Frost dates 2026–2027

Frost dates for North Bend, Washington

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Snoqualmie Falls, 4.8 mi away (close match).

Last spring frostMar 30
First fall frostNov 7
223 frost-free days
Last spring frostMar 301 year in 10 after Apr 21
First fall frostNov 71 year in 10 by Oct 22
Growing season223 daysbetween median 32°F dates
Hardiness zoneZone 8a10 to 15°F average extreme low

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Will it freeze in North Bend in the next 7 nights?

No overnight lows at or below 32°F are forecast in North Bend during the next 7 nights in the available NWS frost forecast.

Tonight: forecast low 42°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 North Bend

The median first fall hard-freeze date (28°F) is November 29, from NOAA’s 1991–2020 Climate Normals at Snoqualmie Falls. 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 8 · Apr 26 · May 13 Oct 4 · Oct 22 · Nov 7 180 days
32°F freeze Mar 4 · Mar 30 · Apr 21 Oct 22 · Nov 7 · Dec 1 223 days
28°F hard freeze Jan 16 · Feb 27 · Mar 25 Nov 6 · Nov 29 · Dec 31 277 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00457773. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Snoqualmie Falls

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 North Bend, WA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Snoqualmie Falls (station USC00457773, elevation 440 ft), 4.8 mi from North Bend. 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 North Bend

CityDistanceLast spring frostFirst fall frost
Snoqualmie, WA 6.2 mi Mar 30 Nov 7
Issaquah, WA 14 mi Mar 13 Nov 16
Sammamish, WA 14 mi Mar 30 Nov 7
Maple Valley, WA 15 mi Apr 20 Oct 25
Black Diamond, WA 17 mi Apr 20 Oct 25
Covington, WA 18 mi Apr 20 Oct 25
Newcastle, WA 19 mi Mar 13 Nov 16
Duvall, WA 19 mi Apr 17 Oct 23
Bellevue, WA 20 mi Mar 8 Nov 23
Renton, WA 20 mi Mar 13 Nov 16

Frequently asked questions

When is the last frost in North Bend?

On average, the last spring frost (32°F) in North Bend is around March 30. In about 1 year in 10 it comes after April 21, and in 9 years in 10 it comes after March 4.

When is the first frost in North Bend?

The first fall frost (32°F) usually arrives around November 7. There’s a 10% chance of a freeze by October 22 and a 90% chance by December 1.

Can it frost in North Bend 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 26.

What growing zone is North Bend?

North Bend is in USDA Plant Hardiness Zone 8a (average annual extreme minimum temperature 10 to 15°F), based on the 2023 USDA map for ZIP code 98045. See growing zones in Washington.

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