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 last day of the month, in Portland sunrise is at 5:02 am and sunset at 8:15 pm EDT. In Portland, Maine, in May, the average water temperature is 46.6°F (8.1°C).
• Lewiston - May »
  In Lewiston, Maine, during the entire year, snow falls for 36.8 days and aggregates up to 18.31" (465mm) of snow. In Lewiston during May, the rain falls for 11.3 days and regularly aggregates up to 1.3" (33mm) of precipitation.
• Bangor - May »
  April and May, with an average relative humidity of 77%, are the least humid months in Bangor, Maine. In Bangor in May, it is raining for 16.7 days, with typically 2.4" (61mm) of accumulated precipitation.
• South Portland - May »
  On the last day of the month, in South Portland, sunrise is at 5:02 am and sunset at 8:15 pm EDT. In South Portland, in May, during 13.2 rainfall days, 1.85" (47mm) of precipitation is typically accumulated.
• Auburn - May »
  During 0.1 snowfall days, in May, Auburn aggregates 0.28" (7mm) of snow. During 0.1 snowfall days, in May, Auburn aggregates 0.28" (7mm) of snow.
• 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 in May, it is raining for 13.9 days, with typically 2.32" (59mm) of accumulated precipitation.
• Sanford - May »
  In Sanford in May, during 12.9 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. In Sanford, during the entire year, snow falls for 31.7 days and aggregates up to 10.51" (267mm) of snow.
• Brunswick - May »
  In Brunswick, Maine, during May, the rain falls for 12.6 days and regularly aggregates up to 1.26" (32mm) of precipitation. In Brunswick in May, during 12.6 rainfall days, 1.26" (32mm) of precipitation is typically accumulated.
• Scarborough - May »
  On the last day of the month, in Scarborough sunrise is at 5:02 am and sunset at 8:15 pm EDT. In Scarborough, during May, the rain falls for 12.4 days and regularly aggregates up to 1.46" (37mm) of precipitation.
• Saco - May »
  In Saco during May, the rain falls for 13.9 days and regularly aggregates up to 2.32" (59mm) of precipitation. In Saco, during the entire year, the rain falls for 133.9 days and collects up to 27.44" (697mm) of precipitation.
• Augusta - May »
  In Augusta, Maine, during the entire year, snow falls for 50.3 days and aggregates up to 29.69" (754mm) of snow. During 0.1 snowfall days, in May, Augusta aggregates 0.63" (16mm) of snow.
• Westbrook - May »
  May is the last month it regularly snows in Westbrook, Maine. In Westbrook, during May, the rain falls for 12.4 days and regularly aggregates up to 1.46" (37mm) of precipitation.