September in Laredo averages a daily high of 35.1°C with nights around 23.4°C. Expect roughly 7 wet days totalling 99.9mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Laredo is November–March.
Based on LAREDO INTERNATIONAL AIRPORT, TX US (5km), 1995–2024. 13 years of September data.