Temperature in Maine in May

Daytime highs, nighttime lows and the warmest cities in Maine, the United States of America this May.

Maine, the United States of America, a region in the United States of America, experiences maximum daytime temperatures in May ranging from 16°C (61°F) in Northeast Harbor to 20°C (68°F) in Sanford. Nighttime temperatures generally drop to 8°C (46°F) in Sanford and 7°C (45°F) in Northeast Harbor.

What is the temperature of the different cities in Maine, the United States of America in May?

Find the average daytime temperatures in May for the most popular destinations in Maine on the map below. Click on a destination dot for more detailed information.

Select a Month

Check the conditions for any month of the year.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

For a detailed overview over the year and the best time to visit Maine, check out our Maine's climate page.

See also: Maine weather by month.

Best Places to Visit in Maine in May

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Maine.

Conditions Temperatures Precipitation
Avg daytime high -5°C (23°F) cold → 32°C (90°F) hot

Marker color shows the average daytime high temperature in May: blue is cold, red is hot.

See all May weather averages, cities and regions in Maine

Maine temperatures in May: frequently asked questions

How hot does it get in Maine, the United States of America in May?

Daytime temperatures in Bar Harbor typically peak at 18°C (64°F) in May, putting it in the moderate range.

How cold does it get at night in Maine, the United States of America in May?

Average overnight lows in Maine, the United States of America during May sit near 8°C (46°F) in Bar Harbor.

What is the warmest city in May in Maine, the United States of America?

Based on our systematic data collection, Sanford has been identified as the city with the highest average temperatures. The daytime temperature usually hovers around 20°C (68°F), while at night it goes down to an approximate temperature of 8°C (46°F).

What is the coldest city in May in Maine, the United States of America?

Our database indicates that in May, Northeast Harbor is the city with the coolest temperatures in Maine, the United States of America. You can expect daytime highs of 16°C (61°F) and nighttime lows close to 7°C (45°F).

What is the water temperature in May?

The water temperature averages approximately 8°C (46°F) in Portland this month, generally too cold for comfortable swimming.

Interested in more climate information?

We have much more information about the climate in Maine.

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.

The Untamed Beauty of Acadia National Park

Explore Acadia National Park on Maine’s Mount Desert Island with scenic drives, hiking, and views from Cadillac Mountain, the tallest peak on the coast.
The 10 most alternative cities in the United States

Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes

A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States

Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.
Must visit in the United States of America →