Frost dates 2026–2027

Frost dates for Cloverdale, California

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Cloverdale, 0.6 mi away (close match).

Last spring frostFeb 25
First fall frostDec 3
279 frost-free days
Last spring frostFeb 251 year in 10 after Apr 2
First fall frostDec 31 year in 10 by Nov 14
Growing season279 daysbetween median 32°F dates
Hardiness zoneZone 9b25 to 30°F average extreme low

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Will it freeze in Cloverdale in the next 7 nights?

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

Tonight: forecast low 48°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 Cloverdale

The median first fall hard-freeze date (28°F) is December 19, from NOAA’s 1991–2020 Climate Normals at Cloverdale. 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 Mar 4 · Apr 5 · Apr 27 Oct 29 · Nov 14 · Dec 2 222 days
32°F freeze Jan 18 · Feb 25 · Apr 2 Nov 14 · Dec 3 · Dec 25 279 days
28°F hard freeze Dec 20 · Jan 12 · Feb 21 Nov 27 · Dec 19 · Jan 18 341 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00041838. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Cloverdale

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 Cloverdale, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Cloverdale (station USC00041838, elevation 400 ft), 0.6 mi from Cloverdale. 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 Cloverdale

CityDistanceLast spring frostFirst fall frost
Healdsburg, CA 14 mi Feb 15 Dec 2
Lakeport, CA 17 mi Mar 5 Nov 21
Windsor, CA 21 mi Mar 2 Nov 20
Clearlake, CA 24 mi Apr 10 Nov 6
Ukiah, CA 26 mi Mar 19 Nov 20
Sebastopol, CA 29 mi Mar 20 Nov 13
Santa Rosa, CA 29 mi Feb 25 Dec 1
Rohnert Park, CA 35 mi Feb 25 Dec 1
St. Helena, CA 35 mi Feb 3 Dec 4
Cotati, CA 36 mi Feb 28 Nov 25

Frequently asked questions

When is the last frost in Cloverdale?

On average, the last spring frost (32°F) in Cloverdale is around February 25. In about 1 year in 10 it comes after April 2, and in 9 years in 10 it comes after January 18.

When is the first frost in Cloverdale?

The first fall frost (32°F) usually arrives around December 3. There’s a 10% chance of a freeze by November 14 and a 90% chance by December 25.

Can it frost in Cloverdale 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 5.

What growing zone is Cloverdale?

Cloverdale is in USDA Plant Hardiness Zone 9b (average annual extreme minimum temperature 25 to 30°F), based on the 2023 USDA map for ZIP code 95425. See growing zones in California.

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