Blacklake, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Blacklake, a community in San Luis Obispo County, California.
This Afternoon
66°F
Slight Chance Rain Showers
A slight chance of rain showers. Mostly sunny, with a high near 66. Northwest wind around 10 mph. Chance of precipitation is 20%.
7-day forecast for Blacklake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Slight Chance Rain Showers | 10 mph NW | 15% |
| Tonight | 51°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 10 mph NNW | 15% |
| Wednesday | 70°F | Sunny | 5 to 15 mph NNW | 0% |
| Wednesday Night | 54°F | Partly Cloudy | 10 to 15 mph NNE | 0% |
| Thursday | 73°F | Sunny | 10 to 15 mph NNE | 0% |
| Thursday Night | 53°F | Mostly Clear | 10 to 15 mph NNE | 0% |
| Friday | 77°F | Sunny | 10 mph NNE | 0% |
| Friday Night | 54°F | Mostly Clear | 5 to 15 mph NNE | 0% |
| Saturday | 78°F | Sunny | 0 to 5 mph NNW | 0% |
| Saturday Night | 54°F | Mostly Clear | 0 to 5 mph NNE | 0% |
| Sunday | 77°F | Sunny | 0 to 5 mph NNW | 0% |
| Sunday Night | 56°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Monday | 75°F | Mostly Sunny | 0 to 5 mph WNW | 0% |
| Monday Night | 56°F | Partly Cloudy | 0 to 5 mph N | 0% |
Forecast source: National Weather Service (api.weather.gov) for Blacklake (35.050, -120.539). Updated through the day.
Growing snapshot for Blacklake
Last spring frost
Feb 4
First fall frost
Dec 13
Growing season
315 days
Hardiness zone
9b
More local growing data for Blacklake: nearby ZIP 93444 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Santa Maria Public Ap, Ca (9.9 mi from Blacklake). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.