May weather forecast
Maine, USA

May ushers in a full-throated chorus of spring across Maine. The state enjoys a noticeable warmth, with nighttime temperatures typically resting in the 40s°F and daytime highs frequently reaching the upper 60s°F.

The Atlantic's moderating influence means coastal towns like Kennebunkport and Belfast experience consistent warmth with less fluctuation between day and night temperatures. Meanwhile, interior regions, such as Bangor and Presque Isle, can occasionally be greeted with cooler mornings, although the afternoons are pleasantly warm.

One of May's hallmarks in Maine is the vibrant greenery. Trees, now fully leafed out, sway with fresh foliage, and flowerbeds burst with color, signaling the prime of spring. This period is also marked by an increase in rainfall. Occasional showers are common, but they often alternate with bright, sunlit days, lending a freshness to the air and further enriching the soil.

Contrasted with April's sporadic chilliness and unpredictable weather, May offers a more stable warmth. However, the occasional cold front can still bring brisk temperatures, especially in northern parts of the state.

As May progresses towards its conclusion and June peeks around the corner, Maine prepares to welcome summer. The days grow longer, outdoor activities gain momentum, and residents and tourists alike start to anticipate the coastal breezes and sun-soaked adventures that characterize a Maine summer.

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• Portland - May »
  On the first day of May in Portland, sunrise is at 5:33 am and sunset at 7:43 pm. Portland, Maine in May experiences the city blossoming into a plethora of colors brought about by the blooming flora.
• Lewiston - May »
  In Lewiston, during the entire year, the rain falls for 103.5 days and collects up to 14.96" (380mm) of precipitation. During 0.1 snowfall days, in May, Lewiston aggregates 0.28" (7mm) of snow.
• Bangor - May »
  During 0.1 snowfall days, in May, Bangor aggregates 0.55" (14mm) of snow. During 0.1 snowfall days, in May, Bangor aggregates 0.55" (14mm) of snow.
• South Portland - May »
  May's onset in South Portland brings a temperature rise, moving from a frosty 47.8°F (8.8°C) in April to a refreshing 57.4°F (14.1°C). On the last day of May, in South Portland sunrise is at 5:02 am and sunset at 8:14 pm EDT.
• Auburn - May »
  In Auburn during May, the rain falls for 11.3 days and regularly aggregates up to 1.3" (33mm) of precipitation. In Auburn, during May, the rain falls for 11.3 days and regularly aggregates up to 1.3" (33mm) of precipitation.
• Biddeford - May »
  In Biddeford, during the entire year, snow falls for 33.7 days and aggregates up to 18.94" (481mm) of snow. In Biddeford, during May, the rain falls for 13.9 days and regularly aggregates up to 2.32" (59mm) of precipitation.
• Sanford - May »
  In Sanford in May, during 12.9 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. During 0.1 snowfall days, in May, Sanford aggregates 0.24" (6mm) of snow.
• Brunswick - May »
  On the first day of May in Brunswick sunrise is at 5:31 am and sunset at 7:42 pm. In Brunswick snow does not fall in May through September.
• Scarborough - May »
  In Scarborough, during May, the rain falls for 12.4 days and regularly aggregates up to 1.46" (37mm) of precipitation. In Scarborough, during the entire year, snow falls for 30.1 days and aggregates up to 12.24" (311mm) of snow.
• Saco - May »
  On the first day of May in Saco sunrise is at 5:34 am and sunset at 7:43 pm. Throughout the year, in Saco, there are 133.9 rainfall days, and 27.44" (697mm) of precipitation is accumulated.
• Augusta - May »
  In Augusta, during the entire year, snow falls for 50.3 days and aggregates up to 29.69" (754mm) of snow. In Augusta, during May, the rain falls for 15.5 days and regularly aggregates up to 2.28" (58mm) of precipitation.
• Westbrook - May »
  In Westbrook, during May, the rain falls for 12.4 days and regularly aggregates up to 1.46" (37mm) of precipitation. In Westbrook, Maine, in May, during 12.4 rainfall days, 1.46" (37mm) of precipitation is typically accumulated.