Galveston, TX weather in August
August in Galveston: hot and oppressively humid, with some rain. Highs 92°F, lows 80°F, about 9 days with rain. This is the peak of the warm season in Galveston. Midday heat is the main thing to plan around.
- Normal high
- 92°F
- Normal low
- 80°F
- Wet days
- 9
- 4.7 in total
- Muggy days
- 31
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 92°F | 91°F |
| Normal low | 80°F | 79°F |
| Chance of a wet day | 25% | 32% |
| Sunrise / sunset | 6:39 am / 8:11 pm | 6:56 am / 7:42 pm |
| Daylight | 13.5 h | 12.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical August day
- 6 am76°Fdew point 73°F
- 9 am85°Fdew point 74°F
- Noon90°Fdew point 72°F
- 3 pm92°Fdew point 71°F
- 6 pm88°Fdew point 72°F
- 9 pm82°Fdew point 73°F
NOAA hourly normals (local standard time) from Houston Intercont Airport (58 mi away); average wind 6 mph; clear or few clouds in 12% of daytime hours, mostly cloudy or overcast in 48%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph21 of 31
- Hot dayshigh 90°F or more24 of 31
- Muggy daysdaily mean dew point 65°F or more31 of 31
- Wet daysat least 0.01 in of rain or melted snow9 of 31
- Notable rainat least 0.10 in5 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 4.7 in; a dry August brings about 0.8 in and a wet one about 6.2 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20202011: average high 94°F
- Coolest August2017: average high 89°F
- Wettest August2017: 26.7 in
- Driest August2011: 0.1 in
- Highest reading100°F (August 27, 2011)
- Lowest reading70°F (August 30, 2017)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 91°F | 92°F | 89°F |
| Normal low | 80°F | 80°F | 76°F |
| Wet days | 8 | 9 | 10 |
| Comfortable days | 0 | 0 | 0 |
| Daylight | 13.8 h | 13.2 h | 12.3 h |
Highs change by +1°F from July and -3°F into September.
Nearby alternatives in August
- Warmer: Austin, TX189 mi · high 98°F · 5 wet days
- Drier: Austin, TX189 mi · high 98°F · 5 wet days
How Galveston ranks in August
- Normal high92nd warmest of 378 cities; 36th of 38 in Texas
- Wet days175th driest of 378
- Comfortable days325th most of 341
What to pack for Galveston in August
- Light, breathable clothing – highs near 92°F and about 31 muggy days
- A rain jacket or umbrella – rain on about 9 days
- A swimsuit – about 21 beach days
Heating and cooling
August has 0 heating degree days and 648 cooling degree days (base 65°F), 15% of the year's total heating and cooling demand.
Questions
How hot is Galveston in August?
The normal high is 92°F and the normal low is 80°F. From 1991 to 2020 the hottest August reading was 100°F (most recently on August 27, 2011).
Does it rain a lot in Galveston in August?
About 9 days in August have at least 0.01 in of precipitation, and the normal total is 4.7 in. The wettest August in 1991-2020 was in 2017 (26.7 in); the driest was in 2011 (0.1 in).
Is August a good time to visit Galveston?
August ranks 12th of 12 months on our comfort score for Galveston (36 out of 100). It has almost no comfortable days and about 24 days at 90°F or hotter. The best months are March, April and November.
Where the numbers come from
- Temperature and rain: Galveston Scholes Fld (USW00012923), 4.2 mi WSW of the city center, 5 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Houston Nwso (USC00414333), 21 mi NW of the city center, 19 ft . NOAA normals and daily records, 1991-2020.
- Frost dates: Galveston (USW00012944), 0.2 mi SW of the city center, 7 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Houston Intercont Airport (USW00012960), 58 mi NW of the city center, 95 ft (89 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Scholes Intl At Glston Apt (722420-12923), 4.5 mi WSW of the city center, 5 ft . Hourly observations, 1991-2020.