January Weather in Rio Vista, United States

Last updated: June 24, 2025

In January, the average temperature in Rio Vista, United States hovers around 9°C (48°F), but be prepared for a range that can dip to a chilling -11°C (12°F) and soar to a warm 27°C (80°F). With an average humidity of 80%, it’s a month where the air feels quite moist. Don't forget your umbrella, as 56 mm (2.2 in) of precipitation is expected over 6 days!

January Temperature in Rio Vista

In January in Rio Vista, the average temperature is 9°C (48°F), with maximums reaching 27°C (80°F) and minimums dropping as low as -11°C (12°F). Be sure to pack layers and prepare for varying weather conditions during your travels.

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

The chart illustrates January temperature patterns in Rio Vista, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Vista, January typically has an average temperature of 9°C (48°F), with highs reaching up to 27°C (80°F) and lows dropping to around -11°C (12°F).

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

January Precipitation in Rio Vista

In Rio Vista in January, the precipitation amount is 56 mm (2.2 in) spread over 6 days.

January Precipitation Trends in Rio Vista

The chart displays monthly precipitation patterns in Rio Vista, 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 Rio Vista, January typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 6 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 Rio Vista

In Rio Vista in January humidity is 80%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and travel quite uncomfortable.

January Average Humidity in Rio Vista

This chart illustrates the average monthly humidity levels in Rio Vista, 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 Rio Vista 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 Rio Vista

In Rio Vista 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 Rio Vista for better planning.

Maximum UV Index Levels in Rio Vista for January

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

Data source: Rio Vista 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 Rio Vista Compares to Other Months

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

This table compares monthly weather conditions in Rio Vista, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	56 mm (2.2 inches)	80%	moderate
February Weather	10°C (50°F)	90 mm (3.5 inches)	79%	high
March Weather	16°C (61°F)	85 mm (3.4 inches)	78%	very high
April Weather	19°C (66°F)	99 mm (3.9 inches)	78%	very high
May Weather	24°C (75°F)	174 mm (6.9 inches)	81%	extreme
June Weather	27°C (82°F)	81 mm (3.2 inches)	78%	extreme
July Weather	29°C (85°F)	62 mm (2.5 inches)	73%	extreme
August Weather	29°C (85°F)	98 mm (3.9 inches)	66%	extreme
September Weather	26°C (80°F)	71 mm (2.8 inches)	65%	very high
October Weather	20°C (69°F)	134 mm (5.3 inches)	72%	very high
November Weather	14°C (57°F)	45 mm (1.8 inches)	82%	high
December Weather	11°C (52°F)	56 mm (2.2 inches)	87%	moderate