December in Heroica Matamoros averages a daily high of 23.2°C with nights around 12.3°C. Expect roughly 6.8 wet days totalling 31.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Heroica Matamoros is November–March.
Based on BROWNSVILLE S PADRE ISLAND INTERNATIONAL AIRPORT, TX US (9.4km), 1995–2024. 30 years of December data.