March in Plano averages a daily high of 20.7°C with nights around 9.1°C. Expect roughly 9 wet days totalling 100mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Plano is March–April.
Based on RICHARDSON, TX US (4.9km), 1995–2024. 18 years of March data.