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Will it freeze in Arroyo Grande in the next 7 nights?
No overnight lows at or below 32°F are forecast in Arroyo Grande during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 54°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 54°F Above 36°F · Mostly Clear
- Fri, Nov 6 53°F Above 36°F · Mostly Clear
- Sat, Nov 7 54°F Above 36°F · Mostly Clear
- Sun, Nov 8 54°F Above 36°F · Mostly Clear
- Mon, Nov 9 55°F Above 36°F · Partly Cloudy
- Tue, Nov 10 54°F Above 36°F · Mostly Clear
- Wed, Nov 11 54°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 Arroyo Grande
Most years have no 28°F hard freeze at Pismo Beach, 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 7 · Mar 1 · Apr 12 | Nov 22 · Dec 14 · Jan 21 | 288 days |
| 32°F freeze | Dec 18 · Feb 1 · Mar 13 | Dec 8 · Jan 4 · Feb 27 | 362 days |
| 28°F hard freeze | rare in most years | rare in most years | 365 days |
Average high temperature by month
1991–2020 normals at Pismo Beach
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 Arroyo Grande, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Pismo Beach (station USC00046943, elevation 39 ft), 6.1 mi from Arroyo Grande. 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 Arroyo Grande
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Grover Beach, CA | 1.9 mi | Feb 1 | Jan 4 |
| Pismo Beach, CA | 5.6 mi | Feb 1 | Jan 4 |
| San Luis Obispo, CA | 11 mi | Jan 31 | Dec 11 |
| Guadalupe, CA | 11 mi | Feb 4 | Dec 13 |
| Santa Maria, CA | 16 mi | Feb 4 | Dec 13 |
| Morro Bay, CA | 23 mi | rare | rare |
| Atascadero, CA | 25 mi | Mar 15 | Nov 10 |
| Lompoc, CA | 32 mi | Jan 20 | Dec 19 |
| Paso Robles, CA | 35 mi | Mar 15 | Nov 10 |
| Buellton, CA | 42 mi | Apr 11 | Nov 8 |
Frequently asked questions
When is the last frost in Arroyo Grande?
On average, the last spring frost (32°F) in Arroyo Grande is around February 1. In about 1 year in 10 it comes after March 13, and in 9 years in 10 it comes after December 18.
When is the first frost in Arroyo Grande?
The first fall frost (32°F) usually arrives around January 4. There’s a 10% chance of a freeze by December 8 and a 90% chance by February 27.
Can it frost in Arroyo Grande 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 1.
What growing zone is Arroyo Grande?
Arroyo Grande is in USDA Plant Hardiness Zone 10a (average annual extreme minimum temperature 30 to 35°F), based on the 2023 USDA map for ZIP code 93433. See growing zones in California.
More: all California frost dates · California growing zones · frost vs. freeze