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Will it freeze in Folsom in the next 7 nights?
No overnight lows at or below 32°F are forecast in Folsom during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 45°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 45°F Above 36°F · Mostly Clear
- Fri, Nov 6 48°F Above 36°F · Mostly Clear
- Sat, Nov 7 48°F Above 36°F · Mostly Clear
- Sun, Nov 8 49°F Above 36°F · Partly Cloudy
- Mon, Nov 9 48°F Above 36°F · Mostly Clear
- Tue, Nov 10 50°F Above 36°F · Mostly Clear 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 Folsom
Most years have no 28°F hard freeze at Sacramento 5 Ese, 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 9 · Feb 12 · Mar 11 | Nov 15 · Dec 1 · Dec 29 | 289 days |
| 32°F freeze | Dec 18 · Jan 12 · Feb 8 | Nov 28 · Dec 16 · Jan 14 | 341 days |
| 28°F hard freeze | Dec 13 · Dec 31 · Jan 22 | Dec 5 · Dec 25 · Jan 14 | 365 days |
Average high temperature by month
1991–2020 normals at Sacramento 5 Ese
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 Folsom, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Sacramento 5 Ese (station USW00023271, elevation 38 ft), 17 mi from Folsom. 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 Folsom
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Rancho Cordova, CA | 8.1 mi | Jan 12 | Dec 16 |
| Citrus Heights, CA | 8.1 mi | Jan 12 | Dec 16 |
| Loomis, CA | 11 mi | Feb 25 | Dec 5 |
| Rocklin, CA | 11 mi | Feb 25 | Dec 5 |
| Roseville, CA | 12 mi | Feb 22 | Nov 24 |
| Auburn, CA | 16 mi | Feb 25 | Dec 5 |
| Lincoln, CA | 17 mi | Feb 25 | Dec 5 |
| Sacramento, CA | 19 mi | Jan 12 | Dec 16 |
| Placerville, CA | 19 mi | Mar 31 | Nov 21 |
| Elk Grove, CA | 22 mi | Feb 2 | Dec 2 |
Frequently asked questions
When is the last frost in Folsom?
On average, the last spring frost (32°F) in Folsom is around January 12. In about 1 year in 10 it comes after February 8, and in 9 years in 10 it comes after December 18.
When is the first frost in Folsom?
The first fall frost (32°F) usually arrives around December 16. There’s a 10% chance of a freeze by November 28 and a 90% chance by January 14.
Can it frost in Folsom 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 12.
What growing zone is Folsom?
Folsom 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 95630. See growing zones in California.
More: all California frost dates · California growing zones · UV index today in Folsom · frost vs. freeze