Last frost date in San Luis Obispo, California
January 31
Average last frost in spring. In an early year (1 in 10) it's over by December 23; in a late year (1 in 10) it comes after March 7.
December 11
Average first frost in fall. 1 year in 10 it comes by November 20.
A 32°F night happens here about 10 years in 10; in those years these are the usual dates.
Source: NOAA U.S. Climate Normals 1991–2020, station San Luis Obispo AP (USW00093206), 2.5 miles from San Luis Obispo, elevation 200 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Dec 23 | Jan 31 | Mar 7 |
| First frost in fall | Nov 20 | Dec 11 | Jan 13 |
Frost-free days in an average year: 319
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Mar 17 | Nov 24 |
| Frost (32°F) | 10 years in 10 | Jan 31 | Dec 11 |
| Hard freeze (28°F) | 4 years in 10 | Jan 3 | Dec 28 |
Nights at 32°F or colder in an average year: 8.0
What to plant now in San Luis Obispo
- Swiss chardJune 1 – Dec 1Now
- Broccoli plantsAug 1 – Nov 1Now
- Brussels sprouts plantsAug 1 – Nov 1Now
- BeetsSept 1 – Dec 31Now
- Cabbage plantsSept 1 – Dec 31Now
- Celery and celeriac plantsSept 1 – Dec 31Now
- Chinese cabbageSept 1 – Nov 15Now
- Collards plantsSept 1 – Dec 31Now
- EndiveSept 1 – Dec 31Now
- Florence fennelSept 1 – Dec 1Now
- KaleSept 1 – Dec 31Now
- LeeksSept 1 – Nov 1Now
- Mustard greensSept 1 – Dec 1Now
- Onion seedSept 1 – Nov 1Now
- ParsnipsSept 1 – Dec 1Now
- SorrelSept 1 – Dec 15Now
- CarrotsSept 15 – Dec 1Now
- GarlicSept 15 – Nov 15Now
- Head lettuce plantsSept 15 – Dec 31Now
- KohlrabiSept 15 – Dec 31Now
- Leaf lettuceSept 15 – Dec 31Now
- ParsleySept 15 – Dec 31Now
- ShallotsSept 15 – Nov 1Now
- Corn saladOct 1 – Dec 31Now
- DandelionOct 1 – Dec 31Now
- Garden peasOct 1 – Dec 31Now
- Onion plants plantsOct 1 – Dec 31Now
- RutabagaOct 1 – Nov 15Now
- SpinachOct 1 – Dec 31Now
- TurnipsOct 1 – Dec 1Now
- Upland cressOct 1 – Dec 31Now
- Chervil and chivesNov 1 – Dec 31Soon
- Onion setsNov 1 – Dec 31Soon
- Spring planting calendar for an average last frost around January 30 San Luis Obispo: January 31
- Fall planting calendar for an average first frost around December 10 San Luis Obispo: December 11
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.
Nearby in California
- Arroyo Grande 11 mi · last frost Feb 1
- Morro Bay 13 mi · last frost Jan 19
- El Paso de Robles (Paso Robles) 25 mi · last frost Mar 15
- Santa Maria 26 mi · last frost Feb 4
- Lompoc 43 mi · last frost Jan 20
Updated