Portland

The tables below display average monthly climate and weather indicators in Portland Maine. Temperature by: Fahrenheit / Centigrade Portland Temperature Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Avg. Temperature 39.6 43.6 47.3 51.0 57.1 63.5 68.2 68.6 63.3 54.5 46.1 40.2 53.6 Avg. Max Temperature 45.4 51.0 56.0 60.6 67.1 74.0 79.9 80.3 74.6 64.0 52.6 45.6 62.6 Avg. Min Temperature 33.7 36.1 38.6 41.3 47.0 52.9 56.5 56.9 52.0 44.9 39.5 34.8 44.5 Days with Max Temp of 90 F or Higher 0.0 0.0 0.0 0.0 < 0.5 1.0 4.0 4.0 2.0 0.0 0.0 0.0 11.0 Days with Min Temp Below Freezing 13.0 8.0 4.0 1.0 2.0 0.0 0.0 0.0 0.0 1.0 5.0 9.0 41.0     Portland Heating and Cooling Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Heating Degree Days 787 599 549 420 249 91.0 28.0 35.0 102 326 567 769 4522 Cooling Degree Days 0.0 0.0 0.0 0.0 0.0 46.0 127 147 51.0 0.0 0.0 0.0 371     Portland Precipitation Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Precipitation (inches) 5.3 3.9 3.6 2.4 2.1 1.5 0.6 1.1 1.8 2.7 5.3 6.1 36.3 Days with Precipitation 0.01 inch or More 18.0 16.0 17.0 14.0 12.0 9.0 4.0 5.0 8.0 12.0 18.0 19.0 152 Monthly Snowfall (inches) 3.2 1.1 0.4 3.0 0.0 0.0 0.0 0.0 < 0.05 0.0 0.4 1.4 6.5     Other Portland Weather Indicators Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Average Wind Speed 10.0 9.2 8.3 7.4 7.1 7.2 7.6 7.1 6.5 6.5 8.6 9.6 7.9 Clear Days 3.0 3.0 3.0 3.0 5.0 6.0 13.0 11.0 10.0 5.0 3.0 2.0 68.0 Partly Cloudy Days 4.0 4.0 5.0 6.0 7.0 8.0 8.0 10.0 8.0 8.0 4.0 3.0 74.0 Cloudy Days 24.0 21.0 23.0 21.0 19.0 16.0 10.0 10.0 12.0 18.0 23.0 26.0 222 Percent of Possible Sunshine 28.0 38.0 48.0 52.0 57.0 56.0 69.0 66.0 62.0 44.0 28.0 23.0 48.0 Avg. Relative Humidity 71.5 80.0 76.0 73.0 70.0 68.0 65.5 64.0 65.5 69.0 75.0 80.0 81.5

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