Houston Temperatures: Averages by Month





The numbers here tell you how hot and cold the weather usually is in Houston, Texas during each month of the year.

The average high and low temperatures are listed below by month and annually for Houston, in both degrees Fahrenheit and Celsius.

Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.

To find out how often it rises over 70, 80 or 90 °F each month in Houston, scroll down farther. There are also counts of nights with warm temperatures and days with cold weather.

The first set of high and low temperatures are averages for 2010 to 2019. Everything else here is based on 1991 to 2020 weather.

10-year temperature averages for Houston, 2010 to 2019
High °F Low °F   High °C Low °C
63 45 January 17 7
68 50 February 20 10
74 56 March 23 13
80 62 April 27 17
86 69 May 30 21
92 76 June 33 24
94 77 July 34 25
95 77 August 35 25
90 74 September 32 23
83 64 October 28 18
73 54 November 23 12
66 49 December 19 9
80 63 Year 27 17
30-year temperature averages for Houston, 1991 to 2020
High °F Low °F   High °C Low °C
64 46 January 18 8
68 50 February 20 10
73 56 March 23 13
79 62 April 26 17
86 69 May 30 21
91 75 June 33 24
93 77 July 34 25
94 77 August 34 25
89 73 September 32 23
82 64 October 28 18
73 54 November 23 12
66 48 December 19 9
80 63 Year 27 17

Days of Hot Weather in Houston

Days of 90-plus degrees Fahrenheit are common throughout the summer in Houston, while the nights seldom get cooler than 70 degrees. On average, three days in July and August see the temperature top 99 degrees.

Daytime highs in the 80s can happen any month of the year in Houston, while most nights stay above 50 degrees.

Days per month in Houston of at least 70, 80 or 90 °F
  70 °F
21 °C
80 °F
27 °C
90 °F
32 °C
January 10 1 0
February 14 2 0
March 23 7 0
April 28 16 0
May 31 28 7
June 30 30 21
July 31 31 26
August 31 31 26
September 30 29 16
October 29 22 3
November 20 7 0
December 13 2 0
Year 290 206 101
Average number of days monthly in Houston that stay above 50, 60 or 70 °F
  50 °F
10 °C
60 °F
16 °C
70 °F
21 °C
January 9 3 0
February 12 5 0
March 22 10 1
April 27 18 3
May 31 28 14
June 30 30 28
July 31 31 31
August 31 31 31
September 30 29 23
October 29 20 7
November 18 8 1
December 11 4 0
Year 281 217 138

How Often Houston Has Cold Temperatures

Houston gets an average of four nights a year when the temperature drops to freezing. This can happen anytime from November to March. It normally never gets colder than 20 °F (-8 °C).

Even after the coldest nights, Houston will warm to above freezing during the day.

References

Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Month and Year, Version 1.0. NOAA National Centers for Environmental Information.

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Houston Weather
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