Houston Temperatures: Averages by Month

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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.

All the numbers are averages, based on climate data gathered from 1981 to 2010.

Average Houston temperatures
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 always warms to above freezing during the day.

Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

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