Climate averages 1991–2020
Piedras Negras weather
in December.
A mild, fairly dry month: the 11th warmest and the joint 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in Piedras Negras: daytime highs average 19.1°C and nights cool to about 8.5°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 27 mm of rain on roughly 5 days, which makes December a fairly dry month (the joint 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 21 min on an average December day.
The nearest other city in this atlas is Ciudad Acuña (81 km away). In December its highs average 18.3°C, 0.8°C cooler than Piedras Negras, with 22 mm of rain.
Among the 153 cities listed in Mexico, Piedras Negras ranks joint 135th of 153 for the warmest December highs and 121st of 153 for the driest December (rainfall, lowest first). The mean December high of those 153 cities is 22.7°C; Piedras Negras is 3.6°C cooler than that mean.
From December to January, average highs fall by 0.1°C to 19.0°C, and monthly rainfall falls from 27 mm to 25 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Ciudad Acuña in DecemberMexico · 81 kmHigh 18.3°C · Low 7.8°C · 22 mm rain
- Nuevo Laredo in DecemberMexico · 168 kmHigh 20.9°C · Low 11.0°C · 28 mm rain
- San Antonio in DecemberUnited States · 213 kmHigh 17.5°C · Low 7.8°C · 63 mm rain
- Monclova in DecemberMexico · 218 kmHigh 20.3°C · Low 8.8°C · 17 mm rain
- New Braunfels in DecemberUnited States · 258 kmHigh 17.1°C · Low 7.6°C · 67 mm rain
- San Angelo in DecemberUnited States · 307 kmHigh 15.4°C · Low 4.2°C · 33 mm rain
- Austin in DecemberUnited States · 321 kmHigh 16.6°C · Low 6.9°C · 70 mm rain
- Corpus Christi in DecemberUnited States · 322 kmHigh 19.8°C · Low 11.7°C · 51 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.