January Weather in San Fernando, United States

Last updated: June 24, 2025

In January, the average temperature in San Fernando, United States hovers around 12°C (54°F), with a minimum dipping to 0°C (33°F) and a maximum reaching as high as 30°C (86°F). Expect an average humidity of 78% and about 77 mm (3.0 in) of precipitation over 5 days, making it a month of varied weather conditions.

January Temperature in San Fernando

In January in San Fernando, the average temperature is 12°C (54°F). The maximum can reach 30°C (86°F), and the minimum can be as low as 0°C (33°F). It's advisable to pack layers to comfortably enjoy the varied weather while traveling.

January Weather in San Fernando: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in San Fernando, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Fernando, January typically has an average temperature of 12°C (54°F), with highs reaching up to 30°C (86°F) and lows dropping to around 0°C (33°F).

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

January Precipitation in San Fernando

In San Fernando in January, the precipitation amount is 77 mm (3.0 in) over the course of 5 days.

January Precipitation Trends in San Fernando

The chart displays monthly precipitation patterns in San Fernando, 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 San Fernando, January typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 5 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 San Fernando

In San Fernando in January humidity is 78%. With an average temperature of 12°C (54°F), this humidity feels like a damp chill settling in, making travel a bit uncomfortable as the air clings to your skin, leaving you feeling cooler than the thermometer suggests.

January Average Humidity in San Fernando

This chart illustrates the average monthly humidity levels in San Fernando, 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 San Fernando is approximately 78%, 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 San Fernando

In San Fernando 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 San Fernando for better planning.

Maximum UV Index Levels in San Fernando for January

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

Data source: San Fernando 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 San Fernando Compares to Other Months

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

This table compares monthly weather conditions in San Fernando, 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 (54°F)	77 mm (3.0 inches)	78%	moderate
February Weather	13°C (55°F)	62 mm (2.5 inches)	82%	high
March Weather	14°C (57°F)	85 mm (3.3 inches)	75%	very high
April Weather	17°C (63°F)	20 mm (0.8 inches)	68%	very high
May Weather	18°C (65°F)	15 mm (0.6 inches)	57%	extreme
June Weather	22°C (71°F)	2 mm (0.1 inches)	52%	extreme
July Weather	25°C (77°F)	1 mm (0.0 inches)	46%	extreme
August Weather	25°C (78°F)	1 mm (0.0 inches)	39%	extreme
September Weather	23°C (75°F)	3 mm (0.1 inches)	48%	very high
October Weather	20°C (69°F)	9 mm (0.4 inches)	59%	high
November Weather	16°C (62°F)	20 mm (0.8 inches)	72%	moderate
December Weather	12°C (54°F)	84 mm (3.3 inches)	76%	moderate