Houston Weather in January

Houston, Texas has it's coldest weather during January. But that just means a few nights of frost. The daytime temperatures are usually mild.

This page gives detailed information on the typical January temperature, precipitation, sun, humidity, wind and storms for Houston. The numbers here are historical averages based on temperature and rainfall measurements gathered at Houston Hobby Airport and other climate data from George Bush Intercontinental Airport.

Temperature

64 °F	January average high	18 °C
46 °F	January average low	8 °C

January is the coldest month overall for Houston and the 3rd to 15th are its chilliest days. They have daily highs averaging 63 degrees Fahrenheit (17 degrees Celsius) and lows of 46 °F (8 °C).

21 days	60 °F max. or more (16 °C)
10 days	40 °F min. or less (4 °C)

Most January days in Houston have a temperature of over 50 °F (10 °C). The city averages ten days this month when the thermometer reaches into the 70s °F (over 21 °C). Sometimes January even has a day when the temperature climbs into the 80s °F (over 26 °C).

The thermometer dips to freezing or below on an average of two nights during the month.

Precipitation

4.1 in	total precipitation	104 mm
10 days	of rain

Half the time, Houston receives 2.2 to 5.9 inches (56 to 151 mm) of rainfall in January. One in four years has drier weather, while another one in four is wetter. Although uncommon, some of the precipitation can fall as snow.

Sun

45 %	sunshine
7 days	clear skies

January is the cloudiest time of year for Houston. The sun's rays reach the ground during 45 percent of daylight hours on average, for a total of 146 hours in the month. Typically on 7 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in January at Houston lasts for 10 hours and 29 minutes a day on average. The shortest day of the month is the 1st with 10 hours and 17 minutes of daylight. By the end of the month, the days have lengthened to 10:47 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humidity

75 %	January average humidity

The relative humidity in Houston during January usually peaks at 85 percent in the morning then drops to 58 percent by mid afternoon.

Local Time	12 am	3 am	6 am	9 am	12 pm	3 pm	6 pm	9 pm
Humidity %	82	84	85	80	63	58	67	78

Wind

8.1 mph

January wind speed average

13.0 kph

January is windier than most other months in Houston.

Storms

3 days	rainfall of 0.5 inches (13 mm) or more
2 days	with thunderstorms in January