Piedras Negras in Summer
In summer (June, July and August), Piedras Negras sees average daytime highs around 37°C and overnight lows near 25°C, with 142 mm of rain over about 17 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.
Across summer, daytime highs hold fairly steady around 37°C. The sky is clear or mostly clear about 54% of the time across summer, and the air most often feels muggy.
Summer is Piedras Negras's weakest season of the year to visit on our travel score. For the whole year in context, see Piedras Negras's year-round climate.
- Avg daytime high
- 37°C
- warmest season of the year
- Avg overnight low
- 25°C
- Rainfall
- 142 mm
- 17 wet days
- Avg wind
- 16 km/h
- Travel score
- 1.8
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Piedras Negras in Summer
Across summer, daytime highs hold fairly steady around 37°C.
A typical summer day in Piedras Negras reaches about 37°C and drops to 25°C overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Piedras Negras
Once humidity and wind are folded in, summer brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Piedras Negras 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 (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 19° / 7° | 25 | 4.4 | 10.4 | 7.1 |
| Feb | 22° / 10° | 27 | 4.5 | 11 | 7.6 |
| Mar | 26° / 14° | 43 | 5.6 | 11.8 | 7.5 |
| Apr | 30° / 18° | 48 | 6.1 | 12.7 | 5.5 |
| May | 33° / 22° | 74 | 8.3 | 13.4 | 3.5 |
| Jun | 36° / 25° | 46 | 6.1 | 13.8 | 2.1 |
| Jul | 37° / 26° | 50 | 5.9 | 13.6 | 1.6 |
| Aug | 37° / 26° | 46 | 4.6 | 13 | 1.6 |
| Sep | 34° / 23° | 79 | 8.3 | 12.2 | 3.5 |
| Oct | 29° / 18° | 60 | 6.5 | 11.3 | 6.2 |
| Nov | 23° / 12° | 36 | 4.8 | 10.6 | 7.8 |
| Dec | 19° / 8° | 27 | 4.5 | 10.2 | 7.1 |
Cloud cover in Summer
The sky is clear or mostly clear about 54% of the time across summer.
Chance of precipitation in Summer
Piedras Negras gets around 142 mm of rain over 17 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 16 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 42 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 6.7 kWh/m².
Is summer a good time to visit Piedras Negras?
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 Piedras Negras.
What to pack for Piedras Negras in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Piedras Negras sees daytime highs around 37°C and nights near 25°C. Pack light clothes and sun protection. About 17 days see rain.
UV index in Piedras Negras 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 Piedras Negras peaks around July 14 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 4 (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 | 6 | 7 | 10 | 10 | 11 | 11 | 11 | 9 | 7 | 5 | 4 |
| Level | Moderate | High | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | Moderate |
| Feb | 6 | High |
| Mar | 7 | Very high |
| Apr | 10 | Very high |
| May | 10 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 9 | Very high |
| Oct | 7 | High |
| Nov | 5 | Moderate |
| Dec | 4 | Moderate |
Air quality in Piedras Negras 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 Piedras Negras is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (February, 8 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 | 8 | 9 | 10 | 16 | 16 | 18 | 13 | 12 | 9 | 10 | 11 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 8 | Good |
| Mar | 9 | Good |
| Apr | 10 | Good |
| May | 16 | Moderate |
| Jun | 16 | Moderate |
| Jul | 18 | Moderate |
| Aug | 13 | Moderate |
| Sep | 12 | Good |
| Oct | 9 | Good |
| Nov | 10 | Good |
| Dec | 11 | Good |
Where is Piedras Negras?
Piedras Negras sits at 28.7°N, 100.5°W, 223 m above sea level, in Mexico. The nearest listed city is Eagle Pass, 3.0 km away.
Topography around Piedras Negras
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Piedras Negras.
Within 3 km, the terrain around Piedras Negras has only modest variations in elevation — a maximum elevation change of 52 m around an average of 227 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 110 m; within 80 km, significant variations in elevation — a maximum elevation change of 586 m.
The land around Piedras Negras is covered by artificial surfaces (60%) within 3 km, shrubs (70%) within 16 km, and shrubs (89%) within 80 km.
Mexico travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B
- 120 / 127 V · 60 Hz
- Prices
- ≈ 54% of US
- price level, 2025
- GDP per capita
- $13,889
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2025
- Safe drinking water
- 43%
- of population, 2024
- Homicide rate
- 24.9
- per 100k, 2023
- Road deaths
- 12.8
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very low
- EF EPI 440
- 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 Piedras Negras (28.7001°, -100.5235°, elevation 223 m), 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.