April in Portland averages a daily high of 12°C with nights around 1.6°C. Expect roughly 11.2 wet days totalling 111.4mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Portland is June–September.
Based on PORTLAND JETPORT, ME US (4km), 1995–2024. 30 years of April data.