Atascadero, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Atascadero, a city in San Luis Obispo County, California.
Overnight
53°F
Mostly Clear
Mostly clear, with a low around 53. South wind around 0 mph.
7-day forecast for Atascadero
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Mostly Clear | 0 mph | 0% |
| Tuesday | 95°F | Sunny | 0 to 10 mph SW | 0% |
| Tuesday Night | 54°F | Mostly Clear | 0 to 10 mph SSW | 0% |
| Wednesday | 96°F | Sunny | 0 to 10 mph SW | 0% |
| Wednesday Night | 57°F | Mostly Clear | 0 to 10 mph WNW | 0% |
| Thursday | 98°F | Sunny | 0 to 10 mph W | 0% |
| Thursday Night | 58°F | Mostly Clear | 0 to 10 mph W | 0% |
| Friday | 96°F | Sunny | 0 to 10 mph W | 0% |
| Friday Night | 60°F | Mostly Clear | 0 to 10 mph W | 0% |
| Saturday | 96°F | Sunny | 0 to 10 mph W | 0% |
| Saturday Night | 61°F | Mostly Clear | 0 to 10 mph SW | 0% |
| Sunday | 93°F | Sunny | 0 to 10 mph SW | 0% |
| Sunday Night | 57°F | Mostly Clear | 0 to 10 mph SW | 1% |
| Monday | 85°F | Sunny | 0 to 10 mph SSW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Atascadero (35.486, -120.688). Updated through the day.
Growing snapshot for Atascadero
Last spring frost
Jan 19
First fall frost
Jan 14
Growing season
365 days
Hardiness zone
9a
More local growing data for Atascadero: nearby ZIP 93422 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Morro Bay Fire Dept, Ca (11.1 mi from Atascadero). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.