Checking current alerts… View NWS forecast and alerts.
Will it freeze in Atascadero in the next 7 nights?
No overnight lows at or below 32°F are forecast in Atascadero 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 48°F Above 36°F · Clear
- Sat, Nov 7 47°F Above 36°F · Mostly Clear
- Sun, Nov 8 46°F Above 36°F · Mostly Clear
- Mon, Nov 9 47°F Above 36°F · Mostly Clear
- Tue, Nov 10 47°F Above 36°F · Mostly Clear
- Wed, Nov 11 47°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 Atascadero
The median first fall hard-freeze date (28°F) is November 26, from NOAA’s 1991–2020 Climate Normals at Paso Robles. 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 24 · Apr 18 · May 6 | Oct 12 · Oct 27 · Nov 12 | 190 days |
| 32°F freeze | Feb 12 · Mar 15 · Apr 13 | Oct 23 · Nov 10 · Nov 29 | 238 days |
| 28°F hard freeze | Jan 2 · Feb 9 · Mar 4 | Nov 4 · Nov 26 · Dec 19 | 287 days |
Average high temperature by month
1991–2020 normals at Paso Robles
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 Atascadero, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Paso Robles (station USC00046730, elevation 730 ft), 9.8 mi from Atascadero. 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 Atascadero
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Paso Robles, CA | 9.9 mi | Mar 15 | Nov 10 |
| Morro Bay, CA | 13 mi | rare | rare |
| San Luis Obispo, CA | 15 mi | Jan 31 | Dec 11 |
| Pismo Beach, CA | 23 mi | Feb 1 | Jan 4 |
| Grover Beach, CA | 25 mi | Feb 1 | Jan 4 |
| Arroyo Grande, CA | 25 mi | Feb 1 | Jan 4 |
| Guadalupe, CA | 37 mi | Feb 4 | Dec 13 |
| Santa Maria, CA | 40 mi | Feb 4 | Dec 13 |
| Coalinga, CA | 49 mi | Feb 14 | Nov 30 |
| Avenal, CA | 50 mi | Feb 19 | Nov 29 |
Frequently asked questions
When is the last frost in Atascadero?
On average, the last spring frost (32°F) in Atascadero is around March 15. In about 1 year in 10 it comes after April 13, and in 9 years in 10 it comes after February 12.
When is the first frost in Atascadero?
The first fall frost (32°F) usually arrives around November 10. There’s a 10% chance of a freeze by October 23 and a 90% chance by November 29.
Can it frost in Atascadero 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 18.
What growing zone is Atascadero?
Atascadero is in USDA Plant Hardiness Zone 9a (average annual extreme minimum temperature 20 to 25°F), based on the 2023 USDA map for ZIP code 93422. See growing zones in California.
More: all California frost dates · California growing zones · UV index today in Atascadero · frost vs. freeze