January Weather in Atascadero, United States

Last updated: June 24, 2025

In Atascadero, United States, the average temperature in January hovers around 11°C (51°F). Expect minimums as low as 1°C (33°F) and maximums reaching 22°C (72°F). Over the month, anticipate 94 mm (3.7 in) of precipitation spread across 6 days, accompanied by an average humidity of 80%. Stay prepared for a mix of cool and wet weather!

January Temperature in Atascadero

In January in Atascadero, the average temperature is 11°C (51°F), with maximums reaching 22°C (72°F) and minimums dipping as low as 1°C (33°F). This mild weather makes it a great time for travelers to explore the outdoors and enjoy the local attractions comfortably.

January Weather in Atascadero: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Atascadero, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Atascadero, January typically has an average temperature of 11°C (51°F), with highs reaching up to 22°C (72°F) and lows dropping to around 1°C (33°F).

Data source: Temperature data for Atascadero generated using information from the Copernicus Climate Change Service.

January Precipitation in Atascadero

In Atascadero in January, the precipitation amount is 94 mm (3.7 in) over the course of 6 days.

January Precipitation Trends in Atascadero

The chart displays monthly precipitation patterns in Atascadero, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Atascadero, January typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Atascadero

In Atascadero in January humidity is 80%. With an average temperature of 11°C (51°F), this humidity feels like a damp blanket wrapping around you, making outdoor activities feel heavier and less enjoyable for traveling.

January Average Humidity in Atascadero

This chart illustrates the average monthly humidity levels in Atascadero, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Atascadero is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Atascadero

In Atascadero in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Atascadero for better planning.

Maximum UV Index Levels in Atascadero for January

The chart shows the monthly maximum UV Index (UVI) for Atascadero in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Atascadero typically reaches 4, which falls under the moderate exposure category.

Data source: Atascadero January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Atascadero Compares to Other Months

Weather in Atascadero varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Atascadero, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Atascadero, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (51°F)	94 mm (3.7 inches)	80%	moderate
February Weather	11°C (52°F)	68 mm (2.7 inches)	83%	moderate
March Weather	12°C (54°F)	75 mm (3.0 inches)	80%	very high
April Weather	14°C (58°F)	20 mm (0.8 inches)	76%	very high
May Weather	16°C (61°F)	10 mm (0.4 inches)	75%	extreme
June Weather	19°C (66°F)	1 mm (0.0 inches)	74%	extreme
July Weather	20°C (68°F)	1 mm (0.0 inches)	75%	extreme
August Weather	20°C (69°F)	1 mm (0.0 inches)	72%	extreme
September Weather	20°C (68°F)	1 mm (0.0 inches)	70%	very high
October Weather	17°C (63°F)	9 mm (0.3 inches)	70%	high
November Weather	14°C (57°F)	29 mm (1.1 inches)	74%	moderate
December Weather	11°C (51°F)	62 mm (2.4 inches)	76%	moderate