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Will it freeze in Concord in the next 7 nights?
No overnight lows at or below 32°F are forecast in Concord 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 48°F Above 36°F · Mostly Clear then Patchy Fog
- Sun, Nov 8 49°F Above 36°F · Partly Cloudy then Patchy Fog
- Mon, Nov 9 49°F Above 36°F · Mostly Clear then Patchy Fog
- Tue, Nov 10 50°F Above 36°F · Partly Cloudy then Slight Chance Light Rain
- Wed, Nov 11 50°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 Concord
Most years have no 28°F hard freeze at Concord Buchanan Field, according to NOAA’s 1991–2020 Climate Normals. Check the short-term forecast above during cold snaps.
| 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 | Jan 12 · Feb 14 · Mar 13 | Nov 14 · Dec 1 · Dec 26 | 294 days |
| 32°F freeze | Dec 16 · Jan 9 · Feb 12 | Nov 28 · Dec 14 · Jan 16 | 343 days |
| 28°F hard freeze | Dec 10 · Dec 30 · Jan 19 | Dec 5 · Dec 23 · Jan 12 | 365 days |
Average high temperature by month
1991–2020 normals at Concord Buchanan Field
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 Concord, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Concord Buchanan Field (station USW00023254, elevation 18 ft), 3.2 mi from Concord. 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 Concord
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Pleasant Hill, CA | 4.3 mi | Jan 7 | Dec 19 |
| Clayton, CA | 4.3 mi | Mar 8 | Dec 22 |
| Walnut Creek, CA | 5.0 mi | Jan 7 | Dec 19 |
| Pittsburg, CA | 6.2 mi | Jan 12 | Dec 19 |
| Martinez, CA | 6.2 mi | Feb 28 | Nov 22 |
| Lafayette, CA | 8.7 mi | Jan 7 | Dec 19 |
| Benicia, CA | 11 mi | Jan 17 | Dec 27 |
| Moraga, CA | 11 mi | rare | rare |
| Orinda, CA | 11 mi | rare | rare |
| Danville, CA | 11 mi | Mar 8 | Dec 22 |
Frequently asked questions
When is the last frost in Concord?
On average, the last spring frost (32°F) in Concord is around January 9. In about 1 year in 10 it comes after February 12, and in 9 years in 10 it comes after December 16.
When is the first frost in Concord?
The first fall frost (32°F) usually arrives around December 14. There’s a 10% chance of a freeze by November 28 and a 90% chance by January 16.
Can it frost in Concord 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 February 14.
What growing zone is Concord?
Concord 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 94519. See growing zones in California.
More: all California frost dates · California growing zones · UV index today in Concord · frost vs. freeze