January Weather in Vista Santa Rosa, United States

Last updated: June 24, 2025

In January, the average temperature in Vista Santa Rosa, United States hovers around 12°C (53°F). Expect a range from a chilly -1°C (31°F) to a warm 26°C (79°F). The precipitation during this time amounts to 28 mm (1.1 in) over approximately 4 days, accompanied by an average humidity of 72%. Enjoy the diverse weather that this month brings!

January Temperature in Vista Santa Rosa

In January in Vista Santa Rosa, the average temperature is 12°C (53°F), with maximums reaching 26°C (79°F) and minimums dropping to as low as -1°C (31°F). It's a great time for travelers to enjoy a mix of mild and warm days, so pack accordingly!

January Weather in Vista Santa Rosa: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Vista Santa Rosa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Vista Santa Rosa, January typically has an average temperature of 12°C (53°F), with highs reaching up to 26°C (79°F) and lows dropping to around -1°C (31°F).

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

January Precipitation in Vista Santa Rosa

In Vista Santa Rosa in January, the precipitation amount is 28 mm (1.1 in) over the course of 4 days.

January Precipitation Trends in Vista Santa Rosa

The chart displays monthly precipitation patterns in Vista Santa Rosa, 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 Vista Santa Rosa, January typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 4 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Vista Santa Rosa

In Vista Santa Rosa in January humidity is 72%. With an average temperature of 12°C (53°F), this humidity feels like a damp chill that clings to your clothes, making outdoor exploration slightly uncomfortable but invigorating as you navigate the refreshing air.

January Average Humidity in Vista Santa Rosa

This chart illustrates the average monthly humidity levels in Vista Santa Rosa, 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 Vista Santa Rosa is approximately 72%, 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 Vista Santa Rosa

In Vista Santa Rosa 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 Vista Santa Rosa for better planning.

Maximum UV Index Levels in Vista Santa Rosa for January

The chart shows the monthly maximum UV Index (UVI) for Vista Santa Rosa 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 Vista Santa Rosa typically reaches 4, which falls under the moderate exposure category.

Data source: Vista Santa Rosa 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 Vista Santa Rosa Compares to Other Months

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

This table compares monthly weather conditions in Vista Santa Rosa, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (53°F)	28 mm (1.1 inches)	72%	moderate
February Weather	13°C (55°F)	28 mm (1.1 inches)	77%	high
March Weather	15°C (60°F)	18 mm (0.7 inches)	67%	very high
April Weather	20°C (68°F)	11 mm (0.4 inches)	56%	extreme
May Weather	23°C (73°F)	2 mm (0.1 inches)	46%	extreme
June Weather	29°C (84°F)	1 mm (0.0 inches)	48%	extreme
July Weather	32°C (89°F)	10 mm (0.4 inches)	46%	extreme
August Weather	32°C (89°F)	7 mm (0.3 inches)	42%	extreme
September Weather	28°C (83°F)	4 mm (0.2 inches)	52%	extreme
October Weather	21°C (71°F)	6 mm (0.2 inches)	58%	very high
November Weather	16°C (61°F)	10 mm (0.4 inches)	66%	moderate
December Weather	11°C (52°F)	27 mm (1.1 inches)	74%	moderate