Atascadero (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Atascadero.
Climate overview of Atascadero
Temperatures in Atascadero, California, United States of America, vary greatly throughout the year. August is the hottest month at 31°C (88°F), while December is the coldest at 16°C (61°F).
The city tends toward dry conditions, with around 442 mm (17 in) of rain/snowfall per year. It does, however, have a distinct dry season from April to November, with very warm summers and mild winters. July is the sunniest month, averaging 11.7 hours of sunshine per day.
Atascadero Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Atascadero - and find the best time to visit.
Monthly Temperature in Atascadero
The climate in Atascadero is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 31°C (88°F) in August to a moderate 16°C (61°F) in the coolest month, December.
Nights vary from 12°C (54°F) in August to around 1°C (34°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Atascadero
Atascadero maintains relatively dry conditions year-round, recording average annual precipitation of 442 mm (17 in). The climate in Atascadero shows significant variation throughout the year. Expect high rainfall in December, the wettest month, with an average of 102 mm (4 in) of precipitation over 10 rainy days.
In contrast, the driest month August offers drier and sunnier days, with around 0.4 mm (0.02 in) of rainfall over 0 rainy days. For more details, please visit our Atascadero Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Atascadero
For those who appreciate different seasons, Atascadero serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 11.7 hours of sunshine daily, and embrace the darker days in January, offering only 6.9 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Atascadero
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: March, April, May, June, October and November
- Warmest weather: July, August and September
- Most sunshine: July and August
- Fewer rainy days: May, June, July, August and September
- Wettest months: January, February, March and December, when rainfall is highest.
- Seasonal pattern: A distinct dry season from April to November, with very warm summers and mild winters
Frequently asked questions about the climate in Atascadero
What is the best time to visit Atascadero?
March, April, May, June, October and November typically offer the most optimal weather in Atascadero. In contrast, December tends to have less optimal conditions. Atascadero has a distinct dry season from April to November, with very warm summers and mild winters.
What temperatures can I expect in Atascadero?
Daytime highs range from 16°C (61°F) in December to 31°C (88°F) in August. Nighttime lows range from 1°C (34°F) to 12°C (54°F). Temperatures vary considerably through the year.
How much rain does Atascadero get?
Annual rainfall is around 442 mm (17 in). December is the wettest month with 102 mm (4 in), while August is the driest with 0.4 mm (0.02 in).
How sunny is Atascadero?
Atascadero receives around 3,187 hours of sunshine per year. July is the sunniest month with 352 hours, while January is the cloudiest with just 208 hours. Overall, Atascadero enjoys abundant sunshine.
Atascadero 3-Day Forecast
Atascadero (CA) 3-Day Forecast
Atascadero on the map
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