Climate averages 1991–2020
Piedras Negras weather
in August.
A very hot, moderately wet month: the warmest and the joint 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a very hot month in Piedras Negras: daytime highs average 36.8°C and nights cool to about 26.4°C. By daytime temperature it is the warmest month of the year.
Expect about 46 mm of rain on roughly 5 days, which makes August a moderately wet month (the joint 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 10 min on an average August day.
The nearest other city in this atlas is Ciudad Acuña (81 km away). In August its highs average 36.0°C, 0.8°C cooler than Piedras Negras, with 41 mm of rain.
Among the 153 cities listed in Mexico, Piedras Negras ranks 5th of 153 for the warmest August highs and joint 24th of 153 for the driest August (rainfall, lowest first). The mean August high of those 153 cities is 27.9°C; Piedras Negras is 8.9°C warmer than that mean.
From August to September, average highs fall by 4.1°C to 32.8°C, and monthly rainfall rises from 46 mm to 79 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Piedras Negras climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 19.0°C7.9°C | 7.9°C | 25 | 4.3 | 10.511 h |
| February | 21.9°C10.2°C | 10.2°C | 27 | 4.5 | 11.211 h |
| March | 25.7°C13.9°C | 13.9°C | 43 | 5.6 | 12.012 h |
| April | 29.9°C17.8°C | 17.8°C | 48 | 6.1 | 12.813 h |
| May | 32.9°C21.8°C | 21.8°C | 74 | 8.3 | 13.614 h |
| June | 35.9°C25.0°C | 25.0°C | 46 | 6.1 | 13.914 h |
| July | 36.6°C25.8°C | 25.8°C | 50 | 5.9 | 13.814 h |
| August, selected | 36.8°C26.4°C | 26.4°C | 46 | 4.6 | 13.213 h |
| September | 32.8°C23.2°C | 23.2°C | 79 | 8.3 | 12.412 h |
| October | 28.7°C18.5°C | 18.5°C | 60 | 6.5 | 11.511 h |
| November | 22.9°C12.9°C | 12.9°C | 36 | 4.8 | 10.711 h |
| December | 19.1°C8.5°C | 8.5°C | 27 | 4.5 | 10.410 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Ciudad Acuña in AugustMexico · 81 kmHigh 36.0°C · Low 26.1°C · 41 mm rain
- Nuevo Laredo in AugustMexico · 168 kmHigh 37.3°C · Low 26.1°C · 35 mm rain
- San Antonio in AugustUnited States · 213 kmHigh 35.1°C · Low 24.7°C · 50 mm rain
- Monclova in AugustMexico · 218 kmHigh 33.7°C · Low 23.8°C · 44 mm rain
- New Braunfels in AugustUnited States · 258 kmHigh 34.9°C · Low 24.5°C · 56 mm rain
- San Angelo in AugustUnited States · 307 kmHigh 34.3°C · Low 23.9°C · 39 mm rain
- Austin in AugustUnited States · 321 kmHigh 35.0°C · Low 24.8°C · 59 mm rain
- Corpus Christi in AugustUnited States · 322 kmHigh 33.1°C · Low 25.8°C · 59 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Piedras Negras) is explained once on the Piedras Negras year overview and on the Sources, method and limits page.