Bar Harbor lies along the Atlantic Seacoast on Mount Desert Island, which includes Acadia National Park and a number of historic sites to visit. When coming to this area, you should become familiar with the weather for the season you plan to arrive so you know how to prepare. Always be prepared, however, for a variety of weather conditions as the climate can be unpredictable.

Spring

Bar Harbor, Maine weather in the spring months often is rainy and cool, with some fog rolling in. However, this is when the trees are getting new leaves and the flowers are blooming, making it an exceptional time to visit.

Temperatures in the spring are in the 60s and 70s by day and down to 30 degrees at night.

Summer

The warm and sunny climate in Bar Harbor in the summertime makes it the ideal time to come to Maine and Mount Desert Island. There’s a little humidity and rainstorms do come in fairly frequently, so you should be prepared.

Bar Harbor temperatures range from the mid 70s to low 80s as pleasantly warm highs and 40 to 50 degrees at night.

Fall

The fall season brings cooler Bar Harbor, ME weather, and the summer crowds grow thin. It’s a wonderful time to visit to avoid tourists and to witness the incredible fall colors. Just ensure you bring a warm jacket. Winds bring quite a chill, so be ready.

Fall temperatures have highs in the 70s falling to the 30s or 40s at night. November is the wettest month of the year, with an average rainfall of 6.42 inches.

Winter

When you check the Bar Harbor weather forecast in the winter, you’ll find reports of freezing rain and low temperatures. Ice storms are common. Of course, winter is the least popular time to come to Mount Desert Island and Bar Harbor, but folks still show up to experience the magical beauty of winter in Maine.

December, January and February have average highs in the 30s and lows in the teens.