Rockwall weather in August

In August, Rockwall sees average daytime highs of 93°F and overnight lows near 75°F, with 2.1 in of rain across 5.6 wet days and about 13.2 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 93°F through the month. The sky is clear or mostly clear about 58% of the time in August, and the air most often feels muggy.

Daylight stretches from about 13 h 36 min at the start of August to 12 h 42 min by month's end. Set against the rest of the year, August is Rockwall's 2nd-clearest and 12th-windiest month. For the whole year in context, see Rockwall's year-round climate.

Daytime high
93°
1st warmest
Overnight low
75°
11th coldest
Rainfall
2.1 in
5.6 wet days
Daylight
13 h 12 min
5:53 AM – 7:07 PM
Cloud cover
41%
2nd clearest
Wind
7 mph
12th windiest
Solar energy
6.22 kWh/m²
Travel score
3.4
out of 10

Rockwall is city in and county seat of Rockwall County, Texas, United States.

Density
582/km²
people per km²
Founded
1854

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 93°F through the month.

A typical August day in Rockwall reaches about 93°F in the afternoon and slips back to 75°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 86°F and 100°F. Set against its neighbours, August runs on par with July and about 6°F warmer than September.

70°80°90°100°151015202531
Avg high (°F)Avg low (°F)
19476
29476
39476
49476
59476
69476
79476
89476
99476
109476
119476
129476
139476
149476
159476
169475
179375
189375
199375
209375
219375
229375
239375
249375
259374
269274
279274
289274
299274
309274
319173

How August really feels in Rockwall

Once humidity and wind are folded in, August averages 31 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
31
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Rockwall weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan56° / 37°2.87.20.410.14.0
Feb60° / 41°3.07.80.610.85.0
Mar67° / 48°4.19.50.211.76.3
Apr74° / 56°4.59.1012.87.1
May82° / 65°5.411.3013.76.0
Jun89° / 72°3.48.9014.14.3
Jul93° / 76°1.96.20143.3
Aug93° / 75°2.15.6013.23.4
Sep87° / 69°2.76.6012.25.3
Oct77° / 57°4.07.9011.27.4
Nov66° / 47°3.77.30.110.36.5
Dec57° / 39°3.87.50.29.94.4

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 58% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 27%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17228
27228
37228
47327
57327
67327
77426
87426
97426
107327
117327
127327
137228
147228
157228
167228
177228
187228
197327
207327
217327
227327
237327
247327
257327
267327
277327
287327
297327
307228
317228

Chance of precipitation in August

Any precipitation

Rockwall gets around 2.1 in of rain over 5.6 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 19% and peaks near 23% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
117
217
317
417
517
617
717
818
918
1018
1118
1219
1319
1419
1519
1619
1719
1819
1919
2019
2119
2219
2319
2419
2520
2620
2720
2821
2922
3022
3123

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the muggy band about 43% of days. Sticky, muggy-or-worse air turns up on roughly 80% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1021444381
2021445381
3021345382
4021346382
5021346372
6021246382
7021246382
8031245382
9031245382
10031244392
11041243392
12041243392
13051242392
14051242392
15051242391
16051342391
17061342381
18061442371
19061442371
20061542361
21061542351
22061643351
23061643340
24061743330
25061743330
26061843320
27161843310
28171943300
29171943300
30271942290
31382041290

Wind in August

Winds average 7 mph in August, the calmest month.

Across August, daily wind ranges from about 7 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 36 min at the start of August to 12 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 54 minutes over August. Sunrise moves from 5:43 AM to 6:03 AM, and sunset from 7:21 PM to 6:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:437:21
213.65:437:20
313.65:447:20
413.65:457:19
513.55:457:18
613.55:467:17
713.55:477:16
813.55:487:15
913.45:487:14
1013.45:497:13
1113.45:507:12
1213.35:507:11
1313.35:517:10
1413.35:527:09
1513.35:527:08
1613.25:537:07
1713.25:547:06
1813.25:557:04
1913.15:557:03
2013.15:567:02
2113.15:577:01
2213.05:577:00
2313.05:586:59
2413.05:596:57
2512.95:596:56
2612.96:006:55
2712.96:016:54
2812.86:016:52
2912.86:026:51
3012.86:036:50
3112.76:036:48

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.22 kWh/m².

For context, solar energy here swings from a low near 2.53 kWh/m² to a high of 6.77 kWh/m² in July across the year — August's 6.22 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.6Intense
26.6Intense
36.6Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.4Intense
96.4Intense
106.4Intense
116.3Intense
126.3Intense
136.3Intense
146.2Intense
156.2Intense
166.2Intense
176.2Intense
186.1Intense
196.1Intense
206.1Intense
216.0Intense
226.0Intense
236.0Bright
245.9Bright
255.9Bright
265.9Bright
275.8Bright
285.8Bright
295.8Bright
305.7Bright
315.7Bright
Planning a trip in August

Hazard calendar for Rockwall

In seasonPeak

In August, Rockwall sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Rockwall sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Rockwall?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.4
Sightseeing
11th-best month of the year
6.7
Beach & pool
3rd-best month of the year

August is a weaker month for outdoor sightseeing in Rockwall. The water and warmth also suit a beach or pool day.

What to pack for Rockwall in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Rockwall sees daytime highs around 93°F and nights near 75°F. Pack light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Rockwall in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rockwall peaks around June 23 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 23UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr10Very high
May10Very high
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Rockwall in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Rockwall is worst in July — around 19 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (October, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1519 µg/m³Oct 248 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar10Good
Apr11Good
May14Moderate
Jun16Moderate
Jul19Moderate
Aug15Moderate
Sep11Good
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Rockwall?

Rockwall sits at 32.9°N, 96.5°W, 591 ft above sea level, in United States. The nearest listed city is Rowlett, 6.2 mi away.

Topography around Rockwall

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Rockwall.

Within 2 miles, the terrain around Rockwall has only modest variations in elevation — a maximum elevation change of 187 ft around an average of 509 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 279 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 617 ft.

The land around Rockwall is covered by artificial surfaces (32%), grassland (25%) and water (21%) within 2 miles, grassland (41%) within 10 miles, and grassland (47%) and trees (26%) within 50 miles.

2 miles
187 ft
10 miles
279 ft
50 miles
617 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Rowlett 6.2 mi · Wylie 7.5 mi · Sachse 8.7 mi · Garland 11 mi · Murphy 11 mi · Forney 12 mi · Mesquite 14 mi · Plano 15 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Rockwall (32.9312°, -96.4597°, elevation 591 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).