Galveston TX Average Temperatures 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 1991 to 2020 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, 1991 to 2020
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 most 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 or September.

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	7	0	0
February	10	0	0
March	20	1	0
April	28	8	0
May	31	26	1
June	30	30	9
July	31	31	20
August	31	31	24
September	30	29	11
October	29	21	1
November	20	4	0
December	10	0	0
Year	277	182	66

Average number of nights each month in Galveston that stay above 50, 60 or 70 °F
	50 °F 10 °C	60 °F 16 °C	70 °F 21 °C
January	13	3	0
February	16	5	0
March	26	15	1
April	29	23	7
May	31	30	22
June	30	30	29
July	31	31	31
August	31	31	31
September	30	30	28
October	31	26	15
November	25	14	3
December	16	6	0
Year	309	244	166

How Often Galveston Has Cold Temperatures

Galveston's winters are mild, typically with only two nights cooling down to below freezing. It normally doesn't get any colder than 20 °F (-8 °C) here.

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	1	5
February	1	2
March	0	1
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	0	3
Year	2	11

Galveston Temperatures: Averages by Month

Days of Hot Weather in Galveston

How Often Galveston Has Cold Temperatures

References

More on Weather in Texas