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Piedras Negras, Coahuila Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Piedras Negras, Coahuila?
Piedras Negras, Coahuila gets 379 mm of precipitation a year over about 39 rainy days. July is the warmest month (average high 39°C) and January the coldest (average low 6°C).
Semi-arid climate
Piedras Negras, Coahuila has hot summers and warm winters. Daytime highs range from about 21°C in December to 39°C in August. September is usually the wettest month. The most comfortable time to visit is typically January to February and November to December, when daytime highs sit near 23°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 7° | 22° |
| Spring | Mar–May | 17° | 32° |
| Summer | Jun–Aug | 24° | 39° |
| Autumn | Sep–Nov | 17° | 31° |
How much rain does Piedras Negras get?
Piedras Negras gets 379 mm of precipitation in an average year, spread over about 39 days with measurable rain. That is fewer rainy days than 78% of Mexico.
September is the wettest month, with 71 mm. February is the driest, with 11 mm. September has the most rainy days, about 5.
The longest dry spell in the last five years lasted 86 days, to May 1, 2022.
From October 2025 to September 2026 Piedras Negras got 345 mm of rain, against a normal of 379 mm for those months. May 2026 had the most, with 91 mm.
Piedras Negras weather by month
Piedras Negras weather in January
In January, Piedras Negras averages a high of 21°C and a low of 6°C. It gets 13 mm of precipitation over about 3 rainy days. Estimated sunshine is 61% of daylight hours, derived from ERA5 cloud cover. The January record high is 37°C (2000) and the record low is -7°C (1985). January is one of the most comfortable months to visit.
Piedras Negras weather in February
In February, Piedras Negras averages a high of 24°C and a low of 8°C. It gets 11 mm of precipitation over about 3 rainy days. Estimated sunshine is 55% of daylight hours, derived from ERA5 cloud cover. The February record high is 40°C (2008) and the record low is -8°C (1985). February is one of the most comfortable months to visit.
Piedras Negras weather in March
In March, Piedras Negras averages a high of 28°C and a low of 13°C. It gets 23 mm of precipitation over about 3 rainy days. Estimated sunshine is 52% of daylight hours, derived from ERA5 cloud cover. The March record high is 40°C (1998) and the record low is -4°C (1980).
Piedras Negras weather in April
In April, Piedras Negras averages a high of 32°C and a low of 16°C. It gets 24 mm of precipitation over about 3 rainy days. Estimated sunshine is 47% of daylight hours, derived from ERA5 cloud cover. The April record high is 44°C (1984) and the record low is 3°C (2007).
Piedras Negras weather in May
In May, Piedras Negras averages a high of 36°C and a low of 21°C. It gets 57 mm of precipitation over about 4 rainy days. Estimated sunshine is 51% of daylight hours, derived from ERA5 cloud cover. The May record high is 45°C (2009) and the record low is 8°C (2011).
Piedras Negras weather in June
In June, Piedras Negras averages a high of 38°C and a low of 23°C. It gets 53 mm of precipitation over about 3 rainy days. Estimated sunshine is 65% of daylight hours, derived from ERA5 cloud cover. The June record high is 48°C (1998) and the record low is 11°C (1987).
Piedras Negras weather in July
In July, Piedras Negras averages a high of 39°C and a low of 24°C. It gets 37 mm of precipitation over about 3 rainy days. Estimated sunshine is 63% of daylight hours, derived from ERA5 cloud cover. The July record high is 47°C (1995) and the record low is 17°C (1995).
Piedras Negras weather in August
In August, Piedras Negras averages a high of 39°C and a low of 24°C. It gets 30 mm of precipitation over about 3 rainy days. Estimated sunshine is 64% of daylight hours, derived from ERA5 cloud cover. The August record high is 46°C (2011) and the record low is 19°C (1978).
Piedras Negras weather in September
In September, Piedras Negras averages a high of 36°C and a low of 22°C. It gets 71 mm of precipitation over about 5 rainy days. Estimated sunshine is 67% of daylight hours, derived from ERA5 cloud cover. The September record high is 46°C (2000) and the record low is 9°C (1995).
Piedras Negras weather in October
In October, Piedras Negras averages a high of 31°C and a low of 17°C. It gets 30 mm of precipitation over about 3 rainy days. Estimated sunshine is 64% of daylight hours, derived from ERA5 cloud cover. The October record high is 41°C (2020) and the record low is -1°C (1980).
Piedras Negras weather in November
In November, Piedras Negras averages a high of 25°C and a low of 11°C. It gets 18 mm of precipitation over about 3 rainy days. Estimated sunshine is 56% of daylight hours, derived from ERA5 cloud cover. The November record high is 36°C (2016) and the record low is -4°C (1992). November is one of the most comfortable months to visit.
Piedras Negras weather in December
In December, Piedras Negras averages a high of 21°C and a low of 6°C. It gets 12 mm of precipitation over about 3 rainy days. Estimated sunshine is 56% of daylight hours, derived from ERA5 cloud cover. The December record high is 33°C (1999) and the record low is -11°C (1983). December is one of the most comfortable months to visit.
Sunshine, humidity and wind in Piedras Negras
September is the sunniest month in Piedras Negras, with estimated sunshine of 67% of daylight hours from ERA5 cloud cover. April is the cloudiest, at 47%. The annual cloud-cover estimate is 58% of daylight hours; it is not a measurement of sunshine duration. Piedras Negras is sunnier than 75% of Mexico.
Humidity peaks in November at 59% and is lowest in March at 47%.
Piedras Negras has about 115 days a year above 32°C. Piedras Negras is hotter than 56% of Mexico.
First and last freeze in Piedras Negras
The first fall freeze in Piedras Negras typically comes around December 8, and the last spring freeze around February 10. That leaves a frost-free growing season of about 301 days.
Piedras Negras weather records
These records cover PIEDRAS NEGRAS (OBS) during 1976–2025. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Piedras Negras station is 48°C, on June 27, 1998. The coldest is -11°C, on December 30, 1983.
The wettest day in the available station history brought 176 mm of precipitation, on September 9, 2001.
42 all-time records have been set at the station since 1976.
The best time to visit Piedras Negras
The most comfortable time to visit is typically January to February and November to December, when daytime highs sit near 23°C.
Winter (December–February) is warm, with average highs around 22°C and lows near 7°C.
Spring (March–May) is hot, with average highs around 32°C and lows near 17°C.
Summer (June–August) is hot, with average highs around 39°C and lows near 24°C.
Autumn (September–November) is hot, with average highs around 31°C and lows near 16°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 6° | 21° | 13 mm | 3 | 50% | 61% | 37° | -7° |
| February | 8° | 24° | 11 mm | 3 | 50% | 55% | 40° | -8° |
| March | 13° | 28° | 23 mm | 3 | 47% | 52% | 40° | -4° |
| April | 16° | 32° | 24 mm | 3 | 49% | 47% | 44° | 3° |
| May | 21° | 36° | 57 mm | 4 | 58% | 51% | 45° | 8° |
| June | 23° | 38° | 53 mm | 3 | 52% | 65% | 48° | 11° |
| July | 24° | 39° | 37 mm | 3 | 50% | 63% | 47° | 17° |
| August | 24° | 39° | 30 mm | 3 | 50% | 64% | 46° | 19° |
| September | 22° | 36° | 71 mm | 5 | 56% | 67% | 46° | 9° |
| October | 17° | 31° | 30 mm | 3 | 53% | 64% | 41° | -1° |
| November | 11° | 25° | 18 mm | 3 | 59% | 56% | 36° | -4° |
| December | 6° | 21° | 12 mm | 3 | 58% | 56% | 33° | -11° |
Station: PIEDRAS NEGRAS (OBS), 1 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1976–2025; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Piedras Negras climate questions
How much rain does Piedras Negras get?
Piedras Negras gets 379 mm of precipitation in an average year, over about 39 rainy days.
What is the wettest month in Piedras Negras?
September is the wettest month in Piedras Negras, with 71 mm. February is the driest, with 11 mm.
How many rainy days does Piedras Negras have a year?
Piedras Negras has about 39 days with measurable rain in an average year. September has the most, about 5.
What is the hottest month in Piedras Negras?
July is the warmest month in Piedras Negras, with an average high of 39°C.
What is the coldest month in Piedras Negras?
January is the coldest month in Piedras Negras, with an average low of 6°C.
What is the record high temperature in Piedras Negras?
Within the available 1976–2025 station history, the record high at the Piedras Negras station is 48°C, set on June 27, 1998. The record low is -11°C, on December 30, 1983.
What is the sunniest month in Piedras Negras?
September is the sunniest month in Piedras Negras, with estimated sunshine of 67% of daylight hours from ERA5 cloud cover. April is the cloudiest.
When is the first frost in Piedras Negras?
The first fall freeze in Piedras Negras typically comes around December 8. The last spring freeze is around February 10.
What is the best time to visit Piedras Negras?
The most comfortable time to visit is typically January to February and November to December, when daytime highs sit near 23°C.
Climate for places near Piedras Negras, Coahuila
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