Climate averages 1991–2020
Piedras Negras weather
in May.
A hot, moderately wet month: the 4th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Piedras Negras: daytime highs average 32.9°C and nights cool to about 21.8°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 74 mm of rain on roughly 8 days, which makes May a moderately wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 34 min on an average May day.
The nearest other city in this atlas is Ciudad Acuña (81 km away). In May its highs average 32.3°C, 0.6°C cooler than Piedras Negras, with 64 mm of rain.
Among the 153 cities listed in Mexico, Piedras Negras ranks joint 32nd of 153 for the warmest May highs and 115th of 153 for the driest May (rainfall, lowest first). The mean May high of those 153 cities is 29.6°C; Piedras Negras is 3.2°C warmer than that mean.
From May to June, average highs rise by 3.0°C to 35.9°C, and monthly rainfall falls from 74 mm to 46 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Ciudad Acuña in MayMexico · 81 kmHigh 32.3°C · Low 21.3°C · 64 mm rain
- Nuevo Laredo in MayMexico · 168 kmHigh 34.0°C · Low 22.6°C · 63 mm rain
- San Antonio in MayUnited States · 213 kmHigh 29.9°C · Low 19.9°C · 103 mm rain
- Monclova in MayMexico · 218 kmHigh 33.0°C · Low 21.0°C · 34 mm rain
- New Braunfels in MayUnited States · 258 kmHigh 29.4°C · Low 19.7°C · 108 mm rain
- San Angelo in MayUnited States · 307 kmHigh 30.0°C · Low 18.2°C · 86 mm rain
- Austin in MayUnited States · 321 kmHigh 29.3°C · Low 19.5°C · 116 mm rain
- Corpus Christi in MayUnited States · 322 kmHigh 29.4°C · Low 22.5°C · 71 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.