Temperature
Hot by day, mild at night.
85°Ftypical Aug high
Atascadero is most comfortable in spring and autumn. Summers are warm and winters are mild. The wetter months are roughly December to March. Humidity is usually low.

Hot by day, mild at night.
One of the driest months, with very little rain.
Plenty of sun this month.
Some hot afternoons, with mostly dry air.
Predominantly clear skies.
Want a side-by-side climate view? Compare Atascadero with Madrid.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 11, 2026
Data & methodology