Galveston Temperatures: Averages by Month





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

The average high and low temperatures are listed below monthly and annually for the city, 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 Galveston, scroll down farther. There are also monthly and yearly counts of 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 Galveston, 2010 to 2019
High °F Low °F   High °C Low °C
61 48 January 16 9
65 53 February 18 11
71 59 March 22 15
77 66 April 25 19
83 73 May 28 23
89 79 June 31 26
90 81 July 32 27
91 81 August 33 27
88 78 September 31 25
82 70 October 28 21
71 59 November 22 15
65 53 December 18 11
78 66 Year 25 19
30-year temperature averages for Galveston, 1981 to 2010
High °F Low °F   High °C Low °C
61 45 January 16 7
63 47 February 17 9
69 54 March 20 12
75 62 April 24 17
82 71 May 28 21
87 76 June 31 25
89 78 July 32 26
90 78 August 32 25
87 73 September 30 23
80 66 October 27 19
71 57 November 22 14
64 47 December 18 9
76 63 Year 25 17

Days of Hot Weather in Galveston

Summer days heat up to at least 80 °F at Galveston with about one-third of those making it into the 90s.

But temperatures over 100 °F (38 °C) are unusual at this Gulf coast city. Only about once or twice a decade does the thermometer climb into the 100s. Temperatures that hot are most likely to occur in August.

Number of days in Galveston of at least 70, 80 or 90 °F
  70 °F
21 °C
80 °F
27 °C
90 °F
32 °C
January 4 0 0
February 6 0 0
March 6 0 0
April 26 3 0
May 31 21 0
June 30 30 4
July 31 31 11
August 31 31 14
September 30 27 5
October 29 17 0
November 19 3 0
December 10 0 0
Year 260 165 35

How Often Galveston Has Cold Temperatures

Galveston's winters are mild, typically with only five nights cooling down to below freezing. It's also unusual for the thermometer to go any lower than 20 °F (-8 °C). Temperatures that cold happen only once every few years.

No matter how cold it gets at night, everything here thaws out here during the day. With the exception of one day a decade when the thermometer doesn't rise above 32 °F.

Days per month on average in Galveston when the minimum temperature drops to 40 or 32 °F or below
  32 °F
0 °C
40 °F
4 °C
January 2 9
February 1 5
March 0 2
April 0 0
May 0 0
June 0 0
July 0 0
August 0 0
September 0 0
October 0 0
November 0 1
December 2 8
Year 5 25
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.)

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