January Weather in Sunset, United States

Last updated: June 24, 2025

In January, the average temperature in Sunset, United States hovers around -3°C (26°F), with extremes ranging from a frigid -22°C (-7°F) to a mild 9°C (49°F). Expect about 58 mm (2.3 in) of precipitation over an average of 10 days, while the air remains quite damp with an average humidity of 91%.

January Temperature in Sunset

In January in Sunset, the average temperature is -3°C (26°F), with maximums reaching 9°C (49°F) and minimums dropping as low as -22°C (-7°F). Be prepared for chilly conditions and pack accordingly if you plan to travel during this time!

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

The chart illustrates January temperature patterns in Sunset, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sunset, January typically has an average temperature of -3°C (26°F), with highs reaching up to 9°C (49°F) and lows dropping to around -22°C (-7°F).

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

January Precipitation in Sunset

In Sunset in January, the total precipitation amount is 58 mm (2.3 in), measured over a span of 10 days.

January Precipitation Trends in Sunset

The chart displays monthly precipitation patterns in Sunset, 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 Sunset, January typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 10 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 Sunset

In Sunset in January humidity is 91%. With an average temperature of -3°C (26°F), this humidity feels like a biting chill that penetrates through your clothing, making travel uncomfortable and the air crisp with an eerie dampness that can quickly sap your energy.

January Average Humidity in Sunset

This chart illustrates the average monthly humidity levels in Sunset, 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 Sunset is approximately 91%, 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 Sunset

In Sunset in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Sunset, you can check the information here.

Maximum UV Index Levels in Sunset for January

The chart shows the monthly maximum UV Index (UVI) for Sunset 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 Sunset typically reaches 3, which falls under the moderate exposure category.

Data source: Sunset 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 Sunset Compares to Other Months

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

This table compares monthly weather conditions in Sunset, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (26°F)	58 mm (2.3 inches)	91%	moderate
February Weather	-2°C (30°F)	69 mm (2.7 inches)	92%	moderate
March Weather	3°C (38°F)	54 mm (2.1 inches)	84%	high
April Weather	8°C (47°F)	64 mm (2.5 inches)	74%	very high
May Weather	13°C (56°F)	53 mm (2.1 inches)	62%	very high
June Weather	20°C (69°F)	18 mm (0.7 inches)	56%	extreme
July Weather	25°C (77°F)	10 mm (0.4 inches)	44%	extreme
August Weather	23°C (74°F)	17 mm (0.7 inches)	37%	very high
September Weather	18°C (64°F)	30 mm (1.2 inches)	46%	very high
October Weather	9°C (48°F)	43 mm (1.7 inches)	67%	high
November Weather	3°C (38°F)	43 mm (1.7 inches)	84%	moderate
December Weather	-3°C (27°F)	51 mm (2.0 inches)	88%	moderate