December in San Angelo averages a daily high of 16.9°C with nights around 1.6°C. Expect roughly 3.9 wet days totalling 19.9mm. Comfortable conditions for being outdoors all day.
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 December data.