Dallas, United States skyline

Dallas Weather in August

The usual August conditions in Dallas, United States, drawn from 2006–2025 records.

Dallas in August: highs near 35.3°C (95.5°F), lows near 25.8°C (78.4°F), roughly 7 rainy days adding up to 72 mm, and 12 hours of sunshine on an average day.

Avg high

35.3°C (95.5°F)

Avg low

25.8°C (78.4°F)

Rainfall

72 mm (2.8 in)

Rainy days

7 days

Sunshine

12 h / day

Humidity

56%

August vs the rest of the year

No month in Dallas is warmer than August; for rain it is the 2nd driest month.

MonthAvg highvs AugustRainRainy days
January13.4°C (56.1°F)−21.9°C (−39.4°F)72 mm6
February15.5°C (59.9°F)−19.8°C (−35.6°F)80 mm8
March20.8°C (69.4°F)−14.5°C (−26.1°F)110 mm10
April24.4°C (75.9°F)−10.9°C (−19.6°F)125 mm10
May28.3°C (82.9°F)−7°C (−12.6°F)157 mm12
June32.7°C (90.9°F)−2.6°C (−4.7°F)106 mm9
July34.8°C (94.6°F)−0.5°C (−0.9°F)59 mm8
August35.3°C (95.5°F)—72 mm7
September31.4°C (88.5°F)−3.9°C (−7°F)87 mm7
October26°C (78.8°F)−9.3°C (−16.7°F)118 mm7
November19.5°C (67.1°F)−15.8°C (−28.4°F)93 mm7
December15°C (59°F)−20.3°C (−36.5°F)81 mm8

What August feels like in Dallas

For Dallas, August is late summer on the calendar. The heat peaks hard in the afternoon, when being outside for long is draining. Evenings ease the heat only slightly, and nights remain very warm. Humidity is moderate, so the air feels neither sticky nor dry.

Rain in Dallas in August

Wet days are occasional rather than regular, about one day in 4. Rain tends to come in heavy bursts: about 10.3 mm (0.4 in) on an average rainy day. That is close to Dallas's typical rain per wet day for the whole year (about 11.7 mm). It is among the three driest months of the year.

Daylight and sunshine in August

On 15 August the sun rises at about 6:50 am and sets around 8:14 pm local time, giving 13 h 24 min of daylight. Days are getting shorter: 44 min less daylight than in mid-July. Measured sunshine covers about 90% of the daylight — skies are mostly clear.

How August compares to the rest of the year

August is the warmest month of the year in Dallas. Compared with July, afternoons are 0.5°C (0.9°F) warmer, with 14 mm more rain. Temperatures keep falling into September. By September, typical highs are 31.4°C (88.5°F).

Who August suits

  • Sightseeing: less ideal — midday heat makes long walks hard.
  • Parks & outdoor: less ideal — afternoons are too warm to linger outside.
  • Museums & indoor: a good choice — a cool break during the hottest hours.

Tips for visiting Dallas in August

Rain Protection

A compact umbrella and a light waterproof jacket.

Sun Protection

Sunscreen, a hat and sunglasses; light breathable clothes.

Quick questions

How warm is Dallas in August?

Afternoons average 35.3°C (95.5°F) and nights about 25.8°C (78.4°F) — very hot by most people's standards. It is the warmest month of the year.

Does it rain a lot in Dallas in August?

Not especially. There are about 7 rainy days (72 mm), mostly moderate rain.

What should I wear in Dallas in August?

The numbers point to rain protection and sun protection. There is little need to change for the evening.

Is August or September better for visiting Dallas?

September scores better on our climate ranking (#6 of 12 vs #10), rated Good against Fair. September is cooler.

Is August a good time to visit Dallas?

Fair

Fair — hot days, some rainy days (about 7), plenty of sunshine (12 h a day). Within Dallas's own year, August ranks #10 of 12 — one of the least comfortable months.

August in other United States cities

Drier places in August

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Monthly averages from 20 years of Open-Meteo history (2006–2025), not a forecast — see all 12 months in Dallas weather by month.