Mercedes in Summer
In summer (June, July and August), Mercedes sees average daytime highs around 96°F and overnight lows near 78°F, with 6.0 in of rain over about 22 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.
Across summer, daytime highs hold fairly steady around 96°F. The sky is clear or mostly clear about 51% of the time across summer, and the air most often feels oppressive.
Summer is Mercedes's weakest season of the year to visit on our travel score. For the whole year in context, see Mercedes's year-round climate.
- Avg daytime high
- 96°F
- warmest season of the year
- Avg overnight low
- 78°F
- Rainfall
- 6.0 in
- 22 wet days
- Avg wind
- 11 mph
- Travel score
- 2.4
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Mercedes in Summer
Across summer, daytime highs hold fairly steady around 96°F.
A typical summer day in Mercedes reaches about 96°F and drops to 78°F overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Mercedes
Once humidity and wind are folded in, summer brings about 92 days that feel above 90°F and 0 that feel at or below 32°F.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Mercedes weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 72° / 53° | 1.1 | 4.8 | 10.5 | 7.4 |
| Feb | 76° / 56° | 1.0 | 4.8 | 11.1 | 7.7 |
| Mar | 81° / 62° | 1.5 | 5.5 | 11.8 | 7.0 |
| Apr | 87° / 68° | 1.7 | 5.5 | 12.6 | 5.3 |
| May | 91° / 73° | 2.1 | 6.9 | 13.3 | 3.8 |
| Jun | 95° / 77° | 2.1 | 7.7 | 13.6 | 2.7 |
| Jul | 97° / 78° | 2.2 | 7 | 13.5 | 2.3 |
| Aug | 97° / 78° | 1.7 | 7.7 | 12.9 | 2.1 |
| Sep | 92° / 75° | 3.6 | 13 | 12.2 | 3.2 |
| Oct | 87° / 68° | 2.5 | 7.2 | 11.4 | 5.3 |
| Nov | 79° / 60° | 1.5 | 6.2 | 10.7 | 7.4 |
| Dec | 73° / 54° | 1.3 | 5.4 | 10.4 | 7.5 |
Cloud cover in Summer
The sky is clear or mostly clear about 51% of the time across summer.
Chance of precipitation in Summer
Mercedes gets around 6.0 in of rain over 22 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 11 mph across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 30 min in early June to 12 h 36 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.6 kWh/m².
Is summer a good time to visit Mercedes?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Mercedes.
What to pack for Mercedes in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Mercedes sees daytime highs around 96°F and nights near 78°F. Pack light clothes and sun protection. About 22 days see rain.
UV index in Mercedes in Summer
Clear-sky midday UV across summer averages 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 5 | 7 | 8 | 11 | 9 | 12 | 11 | 11 | 10 | 8 | 6 | 5 |
| Level | Moderate | High | Very high | Extreme | Very high | Extreme | Extreme | Extreme | Very high | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | Moderate |
| Feb | 7 | High |
| Mar | 8 | Very high |
| Apr | 11 | Extreme |
| May | 9 | Very high |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 10 | Very high |
| Oct | 8 | Very high |
| Nov | 6 | High |
| Dec | 5 | Moderate |
Air quality in Mercedes in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 9 | 10 | 11 | 13 | 20 | 21 | 26 | 19 | 12 | 8 | 7 | 9 |
| Level | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 10 | Good |
| Mar | 11 | Good |
| Apr | 13 | Moderate |
| May | 20 | Moderate |
| Jun | 21 | Moderate |
| Jul | 26 | Moderate |
| Aug | 19 | Moderate |
| Sep | 12 | Moderate |
| Oct | 8 | Good |
| Nov | 7 | Good |
| Dec | 9 | Good |
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.
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
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.