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Weather in May in Portland, Maine

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< May >
 
Normal Max/ High Temperature 17°C (63°F)
 
Average Temperature 12°C (53°F)
 
Min/ Low Temperature 6°C (43°F)
 
Normal Precipitation 92mm (3.6in)
Number of Wet Days (probability of rain on a day) 13 (42%)
Average Sunlight per day 08:27
Average Daylight per day 14:41
Sunny (Cloudy) Daylight Hours 58% (42%)
Sun altitude at solar noon on the 21st day.
66.6°


  • The average temperature in Portland, Maine in May is quite mild at 11.8 °C (53.24 °F).
  • Afternoons can be very mild with average high temperatures reaching 17.3 °C (63.1 °F).
  • Overnight temperatures are generally cool with an average low of 6.3 °C (43.3 °F).
  • In May the mean diurnal temperature variation/ range is 11 °C (19.8 °F).
  • The weather in May is hardly arid with occasional rain. Circa 91.9mm (3.6in) of liquid is released during on average 13 days.
  • In May the skies in Portland, Maine are moderately sunny having on average a respectable 8:27 of radiant sunshine daily.
  • The shortest day is 14:07 long and the longest day is 15:10 long with an average length of 14:41.
  • There are approximately 6:04 per day when bright sunshine is absent due to cloud, haze or the sun being too low on the horizon to register.
  • It is sunny approximately 58.2% of daylight hours and cloudy 41.8% of daylight hours.

Check the distance to and compare the Portland, Maine May averages with somewhere beginning with:

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Weather Trend Graph for May in Portland, Maine, Usa

Graph of weather in Portland, Maine in May

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