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Will it freeze in Saratoga in the next 7 nights?
No overnight lows at or below 32°F are forecast in Saratoga during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 49°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 49°F Above 36°F · Mostly Clear
- Fri, Nov 6 49°F Above 36°F · Mostly Clear
- Sat, Nov 7 48°F Above 36°F · Mostly Clear then Patchy Fog
- Sun, Nov 8 51°F Above 36°F · Mostly Clear
- Mon, Nov 9 50°F Above 36°F · Mostly Clear
- Tue, Nov 10 51°F Above 36°F · Mostly Clear then Slight Chance Light Rain
- Wed, Nov 11 50°F Above 36°F · 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 Saratoga
The median first fall hard-freeze date (28°F) is December 19, from NOAA’s 1991–2020 Climate Normals at Los Gatos. 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 | Feb 16 · Mar 20 · Apr 16 | Nov 4 · Nov 20 · Dec 5 | 241 days |
| 32°F freeze | Dec 31 · Feb 2 · Mar 14 | Nov 16 · Dec 6 · Jan 7 | 310 days |
| 28°F hard freeze | Dec 9 · Jan 1 · Jan 26 | Nov 28 · Dec 19 · Jan 13 | 356 days |
Average high temperature by month
1991–2020 normals at Los Gatos
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 Saratoga, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Los Gatos (station USC00045123, elevation 365 ft), 4.5 mi from Saratoga. 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 Saratoga
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Cupertino, CA | 3.7 mi | Jan 6 | Dec 23 |
| Campbell, CA | 4.3 mi | Feb 2 | Dec 6 |
| Los Gatos, CA | 4.3 mi | Feb 2 | Dec 6 |
| Santa Clara, CA | 7.5 mi | Jan 12 | Dec 22 |
| Los Altos, CA | 8.1 mi | Jan 6 | Dec 23 |
| Sunnyvale, CA | 8.1 mi | Jan 6 | Dec 23 |
| Los Altos Hills, CA | 9.3 mi | Mar 21 | Dec 15 |
| Mountain View, CA | 9.3 mi | Jan 6 | Dec 23 |
| Palo Alto, CA | 11 mi | Feb 1 | Dec 7 |
| San Jose, CA | 12 mi | Jan 2 | Dec 25 |
Frequently asked questions
When is the last frost in Saratoga?
On average, the last spring frost (32°F) in Saratoga is around February 2. In about 1 year in 10 it comes after March 14, and in 9 years in 10 it comes after December 31.
When is the first frost in Saratoga?
The first fall frost (32°F) usually arrives around December 6. There’s a 10% chance of a freeze by November 16 and a 90% chance by January 7.
Can it frost in Saratoga 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 March 20.
What growing zone is Saratoga?
Saratoga 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 95070. See growing zones in California.
More: all California frost dates · California growing zones · UV index today in Saratoga · frost vs. freeze