January Weather in South Bay, United States

Last updated: June 24, 2025

In January, the average temperature in South Bay, United States hovers around 19°C (67°F). Expect a comfortable range, with a minimum of 5°C (42°F) and a maximum reaching 28°C (83°F). The month brings 39 mm (1.5 in) of precipitation spread over approximately 4 days, contributing to an average humidity of 83%. Perfect weather for enjoying the beauty of the season!

January Temperature in South Bay

In January in South Bay, the average temperature is 19°C (67°F), with maximums reaching 28°C (83°F) and minimums dropping as low as 5°C (42°F). This makes it an ideal time for travelers seeking mild weather and pleasant outdoor activities.

January Weather in South Bay: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in South Bay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Bay, January typically has an average temperature of 19°C (67°F), with highs reaching up to 28°C (83°F) and lows dropping to around 5°C (42°F).

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

January Precipitation in South Bay

In South Bay in January, the precipitation amount is 39 mm (1.5 in) spread over a period of 4 days.

January Precipitation Trends in South Bay

The chart displays monthly precipitation patterns in South Bay, 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 South Bay, January typically receives around 39 mm (1.5 inches) of precipitation spread over approximately 4 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 South Bay

In South Bay in January humidity is 83%. With an average temperature of 19°C (67°F), this humidity feels like a warm, tropical blanket wrapping around you, making traveling feel a bit sluggish and sticky, yet still inviting as long as you stay hydrated and take breaks in the shade.

January Average Humidity in South Bay

This chart illustrates the average monthly humidity levels in South Bay, 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 South Bay is approximately 83%, 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 South Bay

In South Bay in January, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in South Bay, you can refer to this Hourly UV Index in South Bay.

Maximum UV Index Levels in South Bay for January

The chart shows the monthly maximum UV Index (UVI) for South Bay 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 South Bay typically reaches 6, which falls under the high exposure category.

Data source: South Bay 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 South Bay Compares to Other Months

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

This table compares monthly weather conditions in South Bay, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	19°C (67°F)	39 mm (1.5 inches)	83%	high
February Weather	21°C (71°F)	40 mm (1.6 inches)	80%	very high
March Weather	22°C (72°F)	26 mm (1.0 inches)	75%	very high
April Weather	25°C (76°F)	53 mm (2.1 inches)	68%	extreme
May Weather	26°C (79°F)	138 mm (5.4 inches)	65%	extreme
June Weather	27°C (81°F)	192 mm (7.6 inches)	73%	extreme
July Weather	28°C (82°F)	166 mm (6.5 inches)	77%	extreme
August Weather	28°C (82°F)	200 mm (7.9 inches)	80%	extreme
September Weather	27°C (82°F)	161 mm (6.3 inches)	83%	extreme
October Weather	26°C (80°F)	123 mm (4.8 inches)	83%	very high
November Weather	23°C (74°F)	49 mm (1.9 inches)	83%	high
December Weather	20°C (69°F)	40 mm (1.6 inches)	84%	moderate