September in Sandy averages a daily high of 26.5°C with nights around 13.9°C. Expect roughly 6 wet days totalling 38mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Sandy is May–June.
Based on COTTONWOOD WEIR, UT US (9km), 1995–2024. 30 years of September data.