Places › Portland, ME › May

Portland in May

One of the best months — score 88 of 100

Typical May days in Portland reach about 64°F with nights near 46°F; rain is frequent — about 12 days see some rain, usually in showers.

What to pack for Portland in May

• A warm jacket for evenings and early starts.
• Layers — afternoons run about 19° warmer than mornings.
• A waterproof shell — rain falls on about 12 days in a typical May.

Every packing line is triggered by a number on this page — the rules are on How we pick.

May vs. the alternatives

The whole year in Portland

Averages are the 1991–2020 climate normals (NOAA National Centers for Environmental Information) for the station named on each page. Rain days = days with at least 0.01 in of precipitation. Daylight is computed for the middle of the month.