September in Lehi averages a daily high of 26.5°C with nights around 8.6°C. Expect roughly 5.8 wet days totalling 25.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Lehi is May–June.
Based on UTAH LAKE LEHI, UT US (5.3km), 1995–2024. 19 years of September data.