Dallas, TX weather in August
Dallas is hot, humid and mostly dry in August: highs average 97°F and nights drop to about 77°F. Rain falls on about 5 days. This is the peak of the warm season in Dallas. Midday heat is the main thing to plan around.
- Normal high
- 97°F
- Normal low
- 77°F
- Wet days
- 5
- 2.2 in total
- Muggy days
- 24
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 99°F | 94°F |
| Normal low | 79°F | 75°F |
| Chance of a wet day | 15% | 19% |
| Sunrise / sunset | 6:41 am / 8:25 pm | 7:01 am / 7:53 pm |
| Daylight | 13.8 h | 12.9 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 am77°Fdew point 69°F
- 9 am84°Fdew point 69°F
- Noon91°Fdew point 68°F
- 3 pm94°Fdew point 66°F
- 6 pm92°Fdew point 65°F
- 9 pm85°Fdew point 67°F
NOAA hourly normals (local standard time) from Dallas Ft Worth Airport (15 mi away); average wind 9 mph; clear or few clouds in 38% of daytime hours, mostly cloudy or overcast in 32%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 31
- Hot dayshigh 90°F or more28 of 31
- Muggy daysdaily mean dew point 65°F or more24 of 31
- Wet daysat least 0.01 in of rain or melted snow5 of 31
- Notable rainat least 0.10 in4 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 2.2 in; a dry August brings about 1.0 in and a wet one about 3.2 in (25th and 75th percentiles). About 1 day brings 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 105°F
- Coolest August1992: average high 91°F
- Wettest August2017: 6.3 in
- Driest August1999: no measurable precipitation
- Highest reading111°F (August 3, 2011)
- Lowest reading60°F (August 28, 1992)
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 | 97°F | 97°F | 90°F |
| Normal low | 78°F | 77°F | 70°F |
| Wet days | 5 | 5 | 6 |
| Comfortable days | 0 | 0 | 2 |
| Daylight | 14.1 h | 13.3 h | 12.4 h |
Highs change by 0°F from July and -7°F into September.
How Dallas ranks in August
- Normal high24th warmest of 378 cities; 6th of 38 in Texas
- Wet days95th driest of 378
- Comfortable days320th most of 341
What to pack for Dallas in August
- Light, breathable clothing – highs near 97°F and about 24 muggy days
Heating and cooling
August has 0 heating degree days and 690 cooling degree days (base 65°F), 13% of the year's total heating and cooling demand.
Questions
How hot is Dallas in August?
The normal high is 97°F and the normal low is 77°F. From 1991 to 2020 the hottest August reading was 111°F (August 3, 2011).
Does it rain a lot in Dallas in August?
About 5 days in August have at least 0.01 in of precipitation, and the normal total is 2.2 in. The wettest August in 1991-2020 was in 2017 (6.3 in); the driest was in 1999, with no measurable precipitation.
Is August a good time to visit Dallas?
August ranks 12th of 12 months on our comfort score for Dallas (35 out of 100). It has almost no comfortable days and about 28 days at 90°F or hotter. The best months are March and April.
Where the numbers come from
- Temperature, rain, snow depth and frost dates: Dallas Love Fld (USW00013960), 5.5 mi NNW of the city center, 440 ft . NOAA normals and daily records, 1991-2020.
- Snowfall, humidity and wind by hour and cloud cover: Dallas Ft Worth Airport (USW00003927), 15 mi WNW of the city center, 560 ft (132 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Dallas/Ft Worth International Airport (722590-03927), 15 mi WNW of the city center, 544 ft (116 ft higher than the city). Hourly observations, 1991-2020.