Mercedes weather in August

In August, Mercedes sees average daytime highs of 97°F and overnight lows near 78°F, with 1.7 in of rain across 7.7 wet days and about 12.9 hours of daylight. It is the 1st-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 97°F through the month. The sky is clear or mostly clear about 47% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 12 min at the start of August to 12 h 36 min by month's end. Set against the rest of the year, August is Mercedes's 4th-clearest and 7th-windiest month. For the whole year in context, see Mercedes's year-round climate.

Daytime high
97°
1st warmest
Overnight low
78°
12th coldest
Rainfall
1.7 in
7.7 wet days
Daylight
12 h 54 min
6:08 AM – 7:04 PM
Cloud cover
48%
4th clearest
Wind
10 mph
7th windiest
Solar energy
6.37 kWh/m²
Travel score
2.1
out of 10

Mercedes is city in Texas, USA.

Density
559/km²
people per km²
Founded
1907

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 97°F through the month.

A typical August day in Mercedes reaches about 97°F in the afternoon and slips back to 78°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 92°F and 102°F. Set against its neighbours, August runs on par with July and about 5°F warmer than September.

70°80°90°100°151015202531
Avg high (°F)Avg low (°F)
19878
29878
39878
49878
59878
69878
79878
89878
99878
109878
119878
129878
139878
149778
159778
169778
179778
189778
199778
209778
219778
229678
239678
249678
259678
269678
279677
289577
299577
309577
319577

How August really feels in Mercedes

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
31 feel dangerously hot (≥ 102°F)
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.

Mercedes weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan72° / 53°1.14.810.57.4
Feb76° / 56°1.04.811.17.7
Mar81° / 62°1.55.511.87.0
Apr87° / 68°1.75.512.65.3
May91° / 73°2.16.913.33.8
Jun95° / 77°2.17.713.62.7
Jul97° / 78°2.2713.52.3
Aug97° / 78°1.77.712.92.1
Sep92° / 75°3.61312.23.2
Oct87° / 68°2.57.211.45.3
Nov79° / 60°1.56.210.77.4
Dec73° / 54°1.35.410.47.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 20% of August, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17129
27129
37129
47129
57129
67030
77030
87030
97030
107030
116931
126931
136931
146832
156832
166832
176733
186733
196634
206634
216634
226535
236535
246436
256436
266238
276139
286040
295941
305941
315842

Chance of precipitation in August

Any precipitation

Mercedes gets around 1.7 in of rain over 7.7 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 26% and peaks near 40% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
119
219
319
419
519
620
720
820
920
1021
1121
1221
1322
1422
1523
1624
1724
1825
1926
2026
2127
2228
2329
2430
2531
2633
2734
2836
2938
3039
3140

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 78% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1028216
2028216
3028216
4028216
5028117
6028117
7028117
8028117
9028117
10028117
11028117
12028117
13028117
14028117
15028117
16028117
17038017
18038017
19038017
20038017
21037918
22047818
23047818
24047719
25047620
26057520
27057421
28057322
29067222
30067123
31176824

Wind in August

Winds average 10 mph in August.

Across August, daily wind ranges from about 9 mph on the calmest days to 11 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
111light breeze
211light breeze
311light breeze
411light breeze
511light breeze
611light breeze
711light breeze
811light breeze
911light breeze
1011light breeze
1111light breeze
1211light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in August

DaylightNight

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

Days shrink by about 36 minutes over August. Sunrise moves from 6:00 AM to 6:15 AM, and sunset from 7:15 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.26:007:15
213.26:017:14
313.26:027:14
413.26:027:13
513.26:037:12
613.16:037:12
713.16:047:11
813.16:047:10
913.16:057:09
1013.16:057:09
1113.06:057:08
1213.06:067:07
1313.06:067:06
1413.06:077:05
1513.06:077:04
1612.96:087:04
1712.96:087:03
1812.96:097:02
1912.96:097:01
2012.86:107:00
2112.86:106:59
2212.86:116:58
2312.86:116:57
2412.76:126:56
2512.76:126:55
2612.76:136:54
2712.76:136:53
2812.66:136:52
2912.66:146:51
3012.66:146:50
3112.66:156:49

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.37 kWh/m².

For context, solar energy here swings from a low near 2.99 kWh/m² to a high of 6.73 kWh/m² in July across the year — August's 6.37 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
46.7Intense
56.7Intense
66.7Intense
76.7Intense
86.6Intense
96.6Intense
106.6Intense
116.5Intense
126.5Intense
136.5Intense
146.5Intense
156.4Intense
166.4Intense
176.3Intense
186.3Intense
196.3Intense
206.2Intense
216.2Intense
226.2Intense
236.1Intense
246.1Intense
256.0Intense
266.0Bright
275.9Bright
285.9Bright
295.8Bright
305.8Bright
315.7Bright
Planning a trip in August

Is August a good time to visit Mercedes?

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

2.1
Sightseeing
12th-best month of the year
5.1
Beach & pool
12th-best month of the year

August is a weaker month for outdoor sightseeing in Mercedes.

What to pack for Mercedes in August

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

In August, Mercedes sees daytime highs around 97°F and nights near 78°F. Pack light clothes and sun protection. About 8 days see rain.

light clothessun protection

UV index in Mercedes in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mercedes peaks around June 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highExtremeVery highHighJun 21UV 12Dec 22UV 5
UV index (midday)Level
Jan5Moderate
Feb7High
Mar8Very high
Apr11Extreme
May9Very high
Jun12Extreme
Jul11Extreme
Aug11Extreme
Sep10Very high
Oct8Very high
Nov6High
Dec5Moderate

Air quality in Mercedes 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 Mercedes is worst in July — around 26 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (November, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1625 µg/m³Nov 107 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar11Good
Apr13Moderate
May20Moderate
Jun21Moderate
Jul26Moderate
Aug19Moderate
Sep12Moderate
Oct8Good
Nov7Good
Dec9Good
Location & terrain

Where is Mercedes?

Mercedes sits at 26.1°N, 97.9°W, 69 ft above sea level, in United States. The nearest listed city is Weslaco, 5.0 mi away.

Topography around Mercedes

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

Within 2 miles, the terrain around Mercedes has only modest variations in elevation — a maximum elevation change of 39 ft around an average of 66 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 174 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 617 ft.

The land around Mercedes is covered by grassland (31%), cropland (26%) and trees (20%) within 2 miles, cropland (52%) and grassland (20%) within 10 miles, and cropland (40%) and grassland (24%) within 50 miles.

2 miles
39 ft
10 miles
174 ft
50 miles
617 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Weslaco 5.0 mi · Donna 8.7 mi · Alamo 13 mi · Harlingen 14 mi · San Juan 16 mi · Ciudad Río Bravo 16 mi · Pharr 17 mi · San Benito 17 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 Mercedes (26.1498°, -97.9136°, elevation 69 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. 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).