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January Weather in Houston, United States

Last updated: June 24, 2025

In January, the average temperature in Houston, United States hovers around 1°C (35°F). It’s a month of contrasts, with minimum temperatures plummeting to -19°C (-1°F) and highs reaching up to 20°C (68°F). Expect a precipitation amount of 73 mm (2.9 in) over approximately 8 days, coupled with an average humidity level of 83%. Embrace the chill and prepare for a unique climate experience!

January Temperature in Houston

In January in Houston, the average temperature is 1°C (35°F). The maximum can reach 20°C (68°F) and the minimum can be as low as -19°C (-1°F). Be prepared for a wide range of temperatures during your travels, as you may experience chilly days as well as surprisingly warm ones.

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 1°C (35°F), with highs reaching up to 20°C (68°F) and lows dropping to around -19°C (-1°F).
JanFebMarAprMayJunJulAugSepOctNovDec343748556574787572584541
Data source: Temperature data for Houston generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Houston

In Houston in January, the precipitation amount is 73 mm (2.9 in) over a span of 8 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 73 mm (2.9 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec73100138170188687597421176863
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Houston

In Houston in January humidity is 83%. With an average temperature of 1°C (35°F), this humidity feels like a damp chill enveloping you, making travel uncomfortable as you contend with the biting cold paired with the heavy moisture in the air.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%81%80%80%83%83%76%69%68%72%83%87%
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.
JanFebMarAprMayJunJulAugSepOctNovDec36710111111109753
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.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)73 mm (2.9 inches)83%moderate
February Weather3°C (38°F)100 mm (3.9 inches)81%high
March Weather9°C (48°F)138 mm (5.4 inches)80%high
April Weather13°C (55°F)170 mm (6.7 inches)80%very high
May Weather18°C (65°F)188 mm (7.4 inches)83%extreme
June Weather23°C (74°F)67 mm (2.7 inches)83%extreme
July Weather26°C (78°F)75 mm (2.9 inches)76%extreme
August Weather24°C (76°F)97 mm (3.8 inches)69%very high
September Weather22°C (72°F)42 mm (1.6 inches)68%very high
October Weather15°C (58°F)117 mm (4.6 inches)72%high
November Weather7°C (45°F)68 mm (2.7 inches)83%moderate
December Weather5°C (41°F)63 mm (2.5 inches)86%moderate

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