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Average Temperatures in Portland, Maine, Usa

  • The average annual temperature in Portland, Maine, Usa is a little cool at 7.4 degrees Celsius (45.3 degrees Fahrenheit).
  • There is a variation of average monthly temperatures of 26.5 C (47.7F) which is a moderate range.
  • The range/ variation of daily average temperatures is 10.6 C (19.1 F).
  • July is the hottest month (warm) having an average temperature of 20.3 degrees Celsius (68.54 degrees Fahrenheit).
  • The coolest month (January) is cold having a mean temperature of -6.2 degrees Celsius (20.84 degrees Fahrenheit).

Average Temperatures Table for Portland, Maine

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
maximum temperature iconAverage Max Temperature C ( F) -0.9 (30.4) 0.6 (33.1) 5.2 (41.4) 11.3 (52.3) 17.3 (63.1) 22.6 (72.7) 26 (78.8) 25.2 (77.4) 20.7 (69.3) 14.8 (58.6) 8.3 (46.9) 1.7 (35.1) 12.7 (54.9)
average temperature iconAverage Temperature C ( F) -6.2 (20.8) -4.8 (23.4) 0.6 (33.1) 6.3 (43.3) 11.8 (53.2) 16.9 (62.4) 20.3 (68.5) 19.6 (67.3) 15.1 (59.2) 9.2 (48.6) 3.7 (38.7) -3.1 (26.4) 7.4 (45.3)
minimum temperature iconAverage Min Temperature C ( F) -11.4 (11.5) -10.3 (13.5) -4.2 (24.4) 1.2 (34.2) 6.3 (43.3) 11.2 (52.2) 14.6 (58.3) 13.9 (57) 9.4 (48.9) 3.5 (38.3) -0.9 (30.4) -7.9 (17.8) 2.1 (35.8)


Portland, Maine Average Temperatures Chart

Portland, Maine average temperatures chart

The average temperature charts use a fixed scale so that you can easily compare temperatures between two or more locations. Simply line up the charts in separate tabs in your browser and toggle between tabs to visualise the differences. The charts have major grid lines at intervals of 10 °C on the left axis corresponding with intervals of 18 °F on the right axis. Minor gridlines mark intervals of 2.5 °C and 4.5 °F. The charts show the relationship between the Celsius and Fahrenheit measuring scales. Locations in the northern hemisphere run from January to December and in the southern hemisphere from July to June so that the middle of the chart always corresponds with the high sun period (for the hemisphere).

Average Temperatures Nearby Portland, Maine


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