Nuevo Laredo features a semiarid climate. Nuevo Laredo's weather is influenced by its proximity to the Chihuahuan Desert to the west, by the Sierra Madre Oriental mountains to the south and west, and by the Gulf of Mexico to the east. Much of the moisture from the Pacific is blocked by the Sierra Madre Oriental. Therefore most of the moisture derives from the Gulf of Mexico. Its geographic location causes Nuevo Laredo's weather to range from long periods of heat to sudden violent storms in a short period of time. Nuevo Laredo is cold for Tamaulipas standards during winter, the average daytime highs are around 66 °F (19 C) and overnight lows around 43 °F (6 C); although it is rare for snow to fall in Nuevo Laredo, there was actually snow on the ground for a few hours on the morning of Christmas Day 2004.
Nuevo Laredo experiences an average high temperature of about 99 °F (37 C), and an average low of about 75 °F (24 C) during summer, and 20 inches (510 mm) of rain per year. As Laredo sometimes undergoes drought, a water conservation ordinance was implemented in 2003
