Frost dates 2026–2027

Frost dates for Woodside, California

Median (50% chance) dates of the last and first 32°F frost, from NOAA 1991–2020 climate normals at Woodside Fire Station 1, 0.5 mi away (close match).

Last spring frostFeb 25
First fall frostNov 25
274 frost-free days
Last spring frostFeb 251 year in 10 after Apr 11
First fall frostNov 251 year in 10 by Nov 3
Growing season274 daysbetween median 32°F dates
Hardiness zoneZone 10a30 to 35°F average extreme low

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Will it freeze in Woodside in the next 7 nights?

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

Tonight: forecast low 50°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 Woodside

The median first fall hard-freeze date (28°F) is December 12, from NOAA’s 1991–2020 Climate Normals at Woodside Fire Station 1. 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 16 · Apr 10 · May 3 Oct 16 · Nov 7 · Nov 25 210 days
32°F freeze Jan 14 · Feb 25 · Apr 11 Nov 3 · Nov 25 · Dec 19 274 days
28°F hard freeze Dec 15 · Jan 13 · Feb 17 Nov 21 · Dec 12 · Jan 14 336 days
NOAA NCEI U.S. Climate Normals 1991–2020, station USC00049792. How to read these probabilities.

Average high temperature by month

1991–2020 normals at Woodside Fire Station 1

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 Woodside, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Woodside Fire Station 1 (station USC00049792, elevation 380 ft), 0.5 mi from Woodside. 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 Woodside

CityDistanceLast spring frostFirst fall frost
Atherton, CA 3.7 mi Jan 17 Dec 12
San Carlos, CA 5.6 mi Jan 17 Dec 12
Palo Alto, CA 6.8 mi Feb 1 Dec 7
Belmont, CA 6.8 mi Jan 17 Dec 12
Redwood City, CA 6.8 mi Jan 17 Dec 12
Menlo Park, CA 7.5 mi Feb 1 Dec 7
East Palo Alto, CA 7.5 mi Feb 1 Dec 7
Los Altos Hills, CA 7.5 mi Mar 21 Dec 15
Los Altos, CA 9.9 mi Jan 6 Dec 23
Foster City, CA 9.9 mi Jan 17 Dec 12

Frequently asked questions

When is the last frost in Woodside?

On average, the last spring frost (32°F) in Woodside is around February 25. In about 1 year in 10 it comes after April 11, and in 9 years in 10 it comes after January 14.

When is the first frost in Woodside?

The first fall frost (32°F) usually arrives around November 25. There’s a 10% chance of a freeze by November 3 and a 90% chance by December 19.

Can it frost in Woodside 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 10.

What growing zone is Woodside?

Woodside is in USDA Plant Hardiness Zone 10a (average annual extreme minimum temperature 30 to 35°F), based on the 2023 USDA map for ZIP code 94062. See growing zones in California.

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