September in San Angelo averages a daily high of 32°C with nights around 18.1°C. Expect roughly 5.1 wet days totalling 64.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit San Angelo is February–April.
Based on SAN ANGELO MATHIS FIELD AIRPORT, TX US (11.5km), 1995–2024. 30 years of September data.