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Galveston Weather by Month
Average temperatures, rainfall and humidity for Galveston, United States, month by month, built from OpenWeather's historical records. Use it to see what a typical Galveston month looks like before you travel — then check the live Galveston forecast for the days ahead.
Warmest month
August
34°C average high
Coolest month
January
8°C average low
Wettest month
September
121 mm of rain
Driest month
February
53 mm of rain
Average temperature and rainfall in Galveston by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 18°C | 8°C | -7°C / 29°C | 81 mm | 72% | 15 km/h |
| February | 20°C | 11°C | -10°C / 30°C | 53 mm | 75% | 16 km/h |
| March | 24°C | 15°C | -2°C / 32°C | 59 mm | 71% | 17 km/h |
| April | 26°C | 17°C | 4°C / 33°C | 68 mm | 73% | 18 km/h |
| May | 30°C | 21°C | 7°C / 35°C | 108 mm | 75% | 16 km/h |
| June | 33°C | 25°C | 19°C / 39°C | 111 mm | 75% | 14 km/h |
| July | 34°C | 25°C | 20°C / 40°C | 58 mm | 73% | 12 km/h |
| August | 34°C | 25°C | 21°C / 42°C | 102 mm | 72% | 12 km/h |
| September | 32°C | 23°C | 14°C / 39°C | 121 mm | 74% | 12 km/h |
| October | 28°C | 18°C | 4°C / 36°C | 80 mm | 71% | 13 km/h |
| November | 23°C | 13°C | -2°C / 31°C | 60 mm | 73% | 14 km/h |
| December | 20°C | 11°C | -8°C / 28°C | 69 mm | 75% | 14 km/h |
Best time to visit Galveston
The most comfortable time to visit Galveston is generally March to April and November, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around September, totalling about 969 mm a year.
Travellers who prefer heat should aim for August, when highs average 34°C. September is the month to avoid if rain would spoil your plans — it averages 121 mm, roughly 2× the rainfall of February.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Galveston forecast for what is happening now.