May in Amarillo averages a daily high of 27°C with nights around 11.3°C. Expect roughly 7.5 wet days totalling 64.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Amarillo is March–May.
Based on AMARILLO AIRPORT, TX US (11.2km), 1995–2024. 30 years of May data.