January Weather in Houston, United States

Last updated: June 24, 2025

The average temperature in Houston, United States for the month of January is a cool 7°C (45°F). Temperatures can vary significantly, with a minimum of -14°C (8°F) and a maximum reaching 25°C (78°F). During this time, you can expect an average precipitation of 128 mm (5.0 in) over approximately 9 days and an average humidity of 85%.

January Temperature in Houston

In January in Houston, the average temperature is 7°C (45°F). Maximum temperatures can reach 25°C (78°F), while minimums can drop as low as -14°C (8°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for their visit.

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 (45°F), with highs reaching up to 25°C (78°F) and lows dropping to around -14°C (8°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 128 mm (5.0 in) over a span of 9 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 128 mm (5.0 inches) of precipitation spread over approximately 9 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 85%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities less enjoyable and requiring extra layers to stay comfortable while traveling.

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 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 Houston

In Houston 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 Houston for better planning.

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 4, 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 (45°F)	128 mm (5.0 inches)	85%	moderate
February Weather	10°C (50°F)	187 mm (7.4 inches)	84%	high
March Weather	14°C (58°F)	163 mm (6.4 inches)	82%	very high
April Weather	17°C (63°F)	153 mm (6.0 inches)	82%	very high
May Weather	22°C (73°F)	120 mm (4.7 inches)	82%	extreme
June Weather	26°C (79°F)	131 mm (5.2 inches)	79%	extreme
July Weather	27°C (82°F)	103 mm (4.1 inches)	82%	extreme
August Weather	27°C (81°F)	127 mm (5.0 inches)	77%	very high
September Weather	25°C (77°F)	92 mm (3.6 inches)	74%	very high
October Weather	19°C (66°F)	113 mm (4.4 inches)	73%	high
November Weather	11°C (52°F)	75 mm (3.0 inches)	85%	high
December Weather	9°C (49°F)	138 mm (5.4 inches)	88%	moderate