January Weather in Dallas, United States

Last updated: June 24, 2025

In January, the average temperature in Dallas, United States hovers around 5°C (42°F), making it a chilly time of year. Expect minimums to dip as low as -10°C (14°F) and maximums reaching up to 15°C (59°F). Prepare for precipitation totaling 165 mm (6.5 in) over approximately 16 days, accompanied by an average humidity of 85%.

January Temperature in Dallas

In January in Dallas, the average temperature is 5°C (42°F). The maximum can reach 15°C (59°F), while the minimum can be as low as -10°C (14°F). This varied climate means travelers should pack for both mild and chilly conditions to ensure a comfortable experience.

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

The chart illustrates January temperature patterns in Dallas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dallas, January typically has an average temperature of 5°C (42°F), with highs reaching up to 15°C (59°F) and lows dropping to around -10°C (14°F).

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

January Precipitation in Dallas

In Dallas in January, the precipitation amount is 165 mm (6.5 in) over a period of 16 days.

January Precipitation Trends in Dallas

The chart displays monthly precipitation patterns in Dallas, 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 Dallas, January typically receives around 165 mm (6.5 inches) of precipitation spread over approximately 16 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 Dallas

In Dallas in January, humidity is 85%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and requiring extra layers to stay warm while exploring.

January Average Humidity in Dallas

This chart illustrates the average monthly humidity levels in Dallas, 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 Dallas is approximately 85%, 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 Dallas

In Dallas in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Dallas, you can visit Hourly UV Index in Dallas.

Maximum UV Index Levels in Dallas for January

The chart shows the monthly maximum UV Index (UVI) for Dallas 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 Dallas typically reaches 2, which falls under the low exposure category.

Data source: Dallas 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 Dallas Compares to Other Months

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

This table compares monthly weather conditions in Dallas, 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 (42°F)	165 mm (6.5 inches)	85%	low
February Weather	5°C (41°F)	166 mm (6.5 inches)	84%	moderate
March Weather	7°C (45°F)	133 mm (5.2 inches)	85%	moderate
April Weather	10°C (51°F)	112 mm (4.4 inches)	83%	high
May Weather	14°C (57°F)	54 mm (2.1 inches)	83%	very high
June Weather	17°C (63°F)	44 mm (1.7 inches)	83%	very high
July Weather	20°C (68°F)	4 mm (0.2 inches)	82%	very high
August Weather	21°C (69°F)	5 mm (0.2 inches)	74%	very high
September Weather	17°C (63°F)	60 mm (2.3 inches)	71%	high
October Weather	11°C (53°F)	89 mm (3.5 inches)	81%	moderate
November Weather	8°C (46°F)	147 mm (5.8 inches)	87%	moderate
December Weather	5°C (41°F)	186 mm (7.3 inches)	87%	low