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Will it freeze in Gilroy in the next 7 nights?
No overnight lows at or below 32°F are forecast in Gilroy 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.
- Tonight 48°F Above 36°F · Mostly Clear
- Fri, Nov 6 47°F Above 36°F · Mostly Clear
- Sat, Nov 7 50°F Above 36°F · Mostly Clear
- Sun, Nov 8 50°F Above 36°F · Mostly Clear
- Mon, Nov 9 50°F Above 36°F · Mostly Clear
- Tue, Nov 10 50°F Above 36°F · Mostly Clear then Slight Chance Light Rain
- Wed, Nov 11 51°F Above 36°F · Slight Chance Light Rain
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 Gilroy
The median first fall hard-freeze date (28°F) is December 12, from NOAA’s 1991–2020 Climate Normals at Gilroy. This is the 50% probability date, not a forecast for this year.
| Temperature | Last 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 4 · May 1 | Oct 20 · Nov 10 · Nov 29 | 218 days |
| 32°F freeze | Jan 23 · Feb 24 · Apr 4 | Nov 10 · Nov 27 · Dec 18 | 277 days |
| 28°F hard freeze | Dec 22 · Jan 16 · Feb 19 | Nov 24 · Dec 12 · Jan 14 | 333 days |
Average high temperature by month
1991–2020 normals at Gilroy
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 Gilroy, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Gilroy (station USC00043417, elevation 194 ft), 1.4 mi from Gilroy. 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 Gilroy
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Morgan Hill, CA | 9.3 mi | Feb 24 | Nov 27 |
| Watsonville, CA | 12 mi | Jan 28 | Dec 13 |
| Hollister, CA | 15 mi | Feb 19 | Dec 1 |
| Capitola, CA | 21 mi | Jan 29 | Dec 13 |
| Salinas, CA | 22 mi | Jan 29 | Dec 10 |
| San Jose, CA | 24 mi | Jan 2 | Dec 25 |
| Scotts Valley, CA | 24 mi | Mar 25 | Nov 11 |
| Santa Cruz, CA | 25 mi | Jan 29 | Dec 13 |
| Marina, CA | 25 mi | Feb 4 | Dec 6 |
| Los Gatos, CA | 25 mi | Feb 2 | Dec 6 |
Frequently asked questions
When is the last frost in Gilroy?
On average, the last spring frost (32°F) in Gilroy is around February 24. In about 1 year in 10 it comes after April 4, and in 9 years in 10 it comes after January 23.
When is the first frost in Gilroy?
The first fall frost (32°F) usually arrives around November 27. There’s a 10% chance of a freeze by November 10 and a 90% chance by December 18.
Can it frost in Gilroy 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 4.
What growing zone is Gilroy?
Gilroy 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 95020. See growing zones in California.
More: all California frost dates · California growing zones · UV index today in Gilroy · frost vs. freeze