January Weather in Santee, United States

Last updated: June 24, 2025

In January, the average temperature in Santee, United States hovers around 10°C (50°F), with a notable range where the minimum can dip as low as -9°C (16°F) and the maximum peaks at 27°C (81°F). Expect about 75 mm (2.9 in) of precipitation spread over 8 days, contributing to an average humidity of 86%. This blend of chilly and warm temperatures, alongside substantial moisture, makes for a dynamic climate.

January Temperature in Santee

In January in Santee, the average temperature is 10°C (50°F). Maximums can reach 27°C (81°F), while minimums can drop as low as -9°C (16°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack layers to stay comfortable throughout the day.

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

The chart illustrates January temperature patterns in Santee, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santee, January typically has an average temperature of 10°C (50°F), with highs reaching up to 27°C (81°F) and lows dropping to around -9°C (16°F).

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

January Precipitation in Santee

In Santee in January, the precipitation amount is 75 mm (2.9 in) over a span of 8 days.

January Precipitation Trends in Santee

The chart displays monthly precipitation patterns in Santee, 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 Santee, January typically receives around 75 mm (2.9 inches) of precipitation spread over approximately 8 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 Santee

In Santee in January humidity is 86%. With an average temperature of 10°C (50°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities uncomfortable and sticky, which can dampen the spirit of travel.

January Average Humidity in Santee

This chart illustrates the average monthly humidity levels in Santee, 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 Santee is approximately 86%, 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 Santee

In Santee 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 Santee for better planning.

Maximum UV Index Levels in Santee for January

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

Data source: Santee 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 Santee Compares to Other Months

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

This table compares monthly weather conditions in Santee, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	75 mm (2.9 inches)	86%	moderate
February Weather	13°C (55°F)	95 mm (3.7 inches)	81%	high
March Weather	15°C (59°F)	76 mm (3.0 inches)	81%	very high
April Weather	19°C (66°F)	114 mm (4.5 inches)	79%	very high
May Weather	23°C (74°F)	92 mm (3.6 inches)	75%	extreme
June Weather	26°C (79°F)	114 mm (4.5 inches)	75%	extreme
July Weather	28°C (82°F)	158 mm (6.2 inches)	80%	extreme
August Weather	27°C (81°F)	136 mm (5.3 inches)	81%	extreme
September Weather	25°C (78°F)	116 mm (4.6 inches)	83%	very high
October Weather	21°C (70°F)	61 mm (2.4 inches)	78%	very high
November Weather	13°C (56°F)	66 mm (2.6 inches)	85%	high
December Weather	11°C (52°F)	137 mm (5.4 inches)	87%	moderate