January Weather in Tri-City, United States

Last updated: June 24, 2025

In January, the average temperature in Tri-City, United States hovers around 5°C (40°F). With a minimum chill of -9°C (16°F) and a pleasant maximum reaching 17°C (63°F), the weather can be quite variable. Expect about 140 mm (5.5 in) of precipitation spread over 15 days, contributing to an overall average humidity of 84%. Be prepared for a mix of chilly days and moisture-laden air!

January Temperature in Tri-City

In January in Tri-City, the average temperature is 5°C (40°F). Maximums can reach 17°C (63°F), while minimums can drop as low as -9°C (16°F). Travelers should be prepared for a wide range of temperatures during this month.

January Weather in Tri-City: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Tri-City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tri-City, January typically has an average temperature of 5°C (40°F), with highs reaching up to 17°C (63°F) and lows dropping to around -9°C (16°F).

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

January Precipitation in Tri-City

In Tri-City in January, the total precipitation amount is 140 mm (5.5 in) over a span of 15 days.

January Precipitation Trends in Tri-City

The chart displays monthly precipitation patterns in Tri-City, 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 Tri-City, January typically receives around 140 mm (5.5 inches) of precipitation spread over approximately 15 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 Tri-City

In Tri-City in January, humidity is 84%. With an average temperature of 5°C (40°F), this humidity feels like a cold, damp blanket enveloping you, making it challenging to enjoy outdoor activities and requiring extra layers for comfort during your travels.

January Average Humidity in Tri-City

This chart illustrates the average monthly humidity levels in Tri-City, 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 Tri-City is approximately 84%, 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 Tri-City

In Tri-City 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 Tri-City, you can check the information here.

Maximum UV Index Levels in Tri-City for January

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

Data source: Tri-City 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 Tri-City Compares to Other Months

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

This table compares monthly weather conditions in Tri-City, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (40°F)	140 mm (5.5 inches)	84%	moderate
February Weather	4°C (40°F)	175 mm (6.9 inches)	85%	moderate
March Weather	7°C (44°F)	124 mm (4.9 inches)	86%	high
April Weather	10°C (49°F)	112 mm (4.4 inches)	83%	very high
May Weather	13°C (55°F)	61 mm (2.4 inches)	83%	very high
June Weather	17°C (62°F)	31 mm (1.2 inches)	83%	very high
July Weather	20°C (68°F)	2 mm (0.1 inches)	78%	very high
August Weather	20°C (68°F)	8 mm (0.3 inches)	67%	very high
September Weather	17°C (62°F)	61 mm (2.4 inches)	66%	very high
October Weather	11°C (52°F)	67 mm (2.6 inches)	77%	high
November Weather	7°C (45°F)	107 mm (4.2 inches)	87%	moderate
December Weather	4°C (39°F)	140 mm (5.5 inches)	87%	low