January Weather in Houston, United States

Last updated: June 24, 2025

In January, the average temperature in Houston, United States hovers around -7°C (20°F). Expect a chilling minimum of -33°C (-27°F), while the mercury can rise to a maximum of 10°C (50°F). With precipitation totaling 37 mm (1.4 in) spread over 7 days, the air feels quite damp, boasting an average humidity of 84%.

January Temperature in Houston

In January in Houston, the average temperature is -7°C (20°F). The maximum can reach 10°C (50°F) and the minimum can be as low as -33°C (-27°F). Be sure to pack warm clothing and prepare for potentially extreme weather conditions when traveling to Houston during this time.

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

The chart illustrates January temperature patterns in Houston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Houston, January typically has an average temperature of -7°C (20°F), with highs reaching up to 10°C (50°F) and lows dropping to around -33°C (-27°F).

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

January Precipitation in Houston

In Houston in January, the precipitation amount is measured at 37 mm (1.4 in) over a span of 7 days.

January Precipitation Trends in Houston

The chart displays monthly precipitation patterns in Houston, 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 Houston, January typically receives around 37 mm (1.4 inches) of precipitation spread over approximately 7 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 Houston

In Houston in January, humidity is 84%. With an average temperature of -7°C (20°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and requiring extra layers to stay warm and dry.

January Average Humidity in Houston

This chart illustrates the average monthly humidity levels in Houston, 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 Houston 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 Houston

In Houston 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 Houston, you can check the information here.

Maximum UV Index Levels in Houston for January

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

Data source: Houston 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 Houston Compares to Other Months

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

This table compares monthly weather conditions in Houston, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (20°F)	37 mm (1.4 inches)	84%	moderate
February Weather	-6°C (21°F)	50 mm (2.0 inches)	85%	moderate
March Weather	2°C (36°F)	60 mm (2.4 inches)	84%	moderate
April Weather	7°C (45°F)	86 mm (3.4 inches)	83%	very high
May Weather	15°C (60°F)	150 mm (5.9 inches)	75%	very high
June Weather	22°C (71°F)	146 mm (5.7 inches)	79%	very high
July Weather	23°C (74°F)	105 mm (4.1 inches)	75%	very high
August Weather	21°C (71°F)	116 mm (4.6 inches)	69%	very high
September Weather	18°C (65°F)	119 mm (4.7 inches)	74%	very high
October Weather	10°C (50°F)	125 mm (4.9 inches)	79%	moderate
November Weather	2°C (35°F)	54 mm (2.1 inches)	88%	moderate
December Weather	-3°C (27°F)	42 mm (1.6 inches)	82%	low