Ciudad Acuna's winters are cool, with January averaging around 11°C and temperatures ranging from -3°C to 28°C. The spring season brings warming temperatures, with March and April averages reaching 19°C and 22°C respectively. Summer months of June to August see consistent highs around 40°C, while the fall season cools down significantly in September and October, with averages dipping back to around 29°C. November and December experience mild temperatures, averaging around 18°C and 17°C, respectively. The temperature fluctuations are relatively moderate throughout the year, except for the brief but intense summer heatwave.