January Weather in Houston, United States

Last updated: June 24, 2025

In January, the average temperature in Houston, United States hovers around -12°C (11°F), making it a chilly season. Expect a minimum plunge to -34°C (-29°F), while temperatures can peak at 6°C (44°F). Prepare for 38 mm (1.5 in) of precipitation spread across 7 days, and brace yourself for an impressive average humidity of 94%, adding to the crisp atmosphere.

January Temperature in Houston

In January in Houston, the average temperature is -12°C (11°F), with a maximum that can reach 6°C (44°F) and a minimum that can drop as low as -34°C (-29°F). Travelers should be prepared for extreme cold conditions 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 -12°C (11°F), with highs reaching up to 6°C (44°F) and lows dropping to around -34°C (-29°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 38 mm (1.5 in) over the course 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 38 mm (1.5 inches) of precipitation spread over approximately 7 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 Houston

In Houston in January, humidity is 94%. With an average temperature of -12°C (11°F), this humidity feels like an icy mist clinging to your skin, making every breath sharp and biting, and turning even the shortest walks into a challenge against the extreme chill.

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 94%, 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 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Houston.

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 1, which falls under the low 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	-12°C (11°F)	38 mm (1.5 inches)	94%	low
February Weather	-9°C (16°F)	49 mm (1.9 inches)	93%	low
March Weather	-6°C (21°F)	42 mm (1.7 inches)	91%	moderate
April Weather	2°C (36°F)	43 mm (1.7 inches)	85%	moderate
May Weather	9°C (48°F)	99 mm (3.9 inches)	88%	high
June Weather	13°C (55°F)	98 mm (3.9 inches)	95%	high
July Weather	15°C (60°F)	103 mm (4.0 inches)	102%	high
August Weather	13°C (56°F)	152 mm (6.0 inches)	100%	moderate
September Weather	9°C (48°F)	106 mm (4.2 inches)	96%	moderate
October Weather	2°C (37°F)	109 mm (4.3 inches)	91%	low
November Weather	-7°C (20°F)	63 mm (2.5 inches)	95%	low
December Weather	-8°C (18°F)	76 mm (3.0 inches)	96%	low