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 1981 to 2010 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, 1981 to 2010
High °F Low °F   High °C Low °C
63 43 January 17 6
66 47 February 19 8
73 53 March 23 11
80 59 April 26 15
86 68 May 30 20
91 73 June 33 23
94 75 July 34 24
95 75 August 35 24
90 70 September 32 21
82 61 October 28 16
73 52 November 23 11
64 45 December 18 7
80 60 Year 27 16

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, four 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 9 1 0
February 12 2 0
March 21 6 0
April 27 16 1
May 31 28 7
June 30 30 21
July 31 31 26
August 31 31 27
September 30 29 17
October 29 20 3
November 19 7 0
December 11 1 0
Year 282 201 102
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 7 2 0
February 9 3 0
March 18 8 1
April 25 15 4
May 31 27 12
June 30 30 25
July 31 31 30
August 31 31 29
September 30 27 19
October 27 17 5
November 17 7 1
December 9 4 0
Year 265 201 127

How Often Houston Has Cold Temperatures

Houston gets an average of 10 nights a year when the temperature drops to freezing. This can happen anytime from December to March. It normally never gets below 21 °F, though.

Even after the coldest nights, Houston usually warms 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. 1981-2010 U.S. Climate Normals. (Data Access. FTP.)

Houston Weather
Back to Top