Shade contributes significantly to mitigating urban heat in summer by reducing solar radiation. This study aimed to identify effective tree characteristics—specifically tree height and crown base height—for enhancing shade in urban streetscapes. Using the Sun Shadow Frequency tool in ArcGIS Pro, shade patterns were analyzed on June 21 (summer solstice) under two scenarios: tree height (8 m, 15 m, 20 m) and crown base height (1.5 m, 3 m, 4.5 m). Results showed that trees greatly increased shaded areas along pedestrian paths. Taller trees and lower crown bases produced more shade. North side pedestrian paths on east–west streets received the most shade, while south side pedestrian paths were less affected. On north–south streets, shade patterns were symmetrical, and tree and building shadows were complementary. These findings highlight how shade varies with time, street orientation, and tree structure, offering useful insights for urban shade policies and green infrastructure planning.