March in Gresham averages a daily high of 13.3°C with nights around 4.1°C. Expect roughly 18.3 wet days totalling 109.5mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Gresham is June–September.
Based on PORTLAND TROUTDALE AIRPORT, OR US (6.1km), 1995–2024. 25 years of March data.