July in Gresham averages a daily high of 28.1°C with nights around 13.8°C. Expect roughly 3.3 wet days totalling 9.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Gresham is June–September.
Based on PORTLAND TROUTDALE AIRPORT, OR US (6.1km), 1995–2024. 27 years of July data.