Climate & Temperature > Usa > Portland, Maine

Portland, Maine Climate Guide to the Average Weather & Temperatures with Graphs Elucidating Sunshine and Rainfall Data & Information about Wind Speeds & Humidity:

  • Portland, Maine, Usa latitude & longitude; 43°39'N 70°19'W.
  • Altitude; 19 m (62 ft).
  • The average temperature in Portland, Maine, Usa is 7.2 °C (45 °F).
  • The range of average monthly temperatures is 25.5 °C.
  • The warmest average max/ high temperature is 26 °C (79 °F) in July & August.
  • The coolest average min/ low temperature is -11 °C (12 °F) in January & February.
  • Portland, Maine receives on average 1090 mm (42.9 in) of precipitation annually or 91 mm (3.6 in) each month.
  • On balance there are 133 days annually on which greater than 0.1 mm (0.004 in) of precipitation (rain, sleet, snow or hail) occurrs or 11.1 days on an average month.
  • The month with the driest weather is August when on balance 61 mm (2.4 in) of rain, sleet, hail or snow falls across 10 days.
  • The month with the wettest weather is January when on balance 112 mm (4.4 in) of rain, sleet, hail or snow falls across 12 days.
  • Mean relative humidity for an average year is recorded as 60.8% and on a monthly basis it ranges from 58% in April, May to 64% in January, November.
  • There is an average range of hours of sunshine in Portland, Maine of between 4.5 hours per day in November and 10.2 hours per day in July.
  • On balance there are 2592 sunshine hours annually and approximately 7.1 sunlight hours for each day.

Portland, Maine Climate Graph (Metric | Imperial units)

Portland, Maine Climate Graph

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Portland, Maine Weather Averages

  Average Minimum Temperatures in Portland, Maine, Usa (°C) Average Maximum Temperature in Portland, Maine, Usa (°C) Portland, Maine Average Temperature (°C) Average Sea Temp (°C) Average Precipitation/ Rainfall (mm) Wet Days (>0.1 mm) Average Sunlight Hours/ Day Relative Humidity (%) Average Wind Speed in Portland, Maine (Beaufort) Average Number of Days with Frost  
Weather in Portland, Maine in January -11 0 -5.5 - 112 12 4.7 64 3 - Average Temperature in Portland, Maine in January
Weather in Portland, Maine in February -11 1 -5 - 97 11 5.8 61 3 - Average Temperature in Portland, Maine in February
Weather in Portland, Maine in March -6 5 -1 - 109 12 6.5 60.0 3 - Average Temperature in Portland, Maine in March
Weather in Portland, Maine in April 0 11 6 - 94 12 7.0 58 3 - Average Temperature in Portland, Maine in April
Weather in Portland, Maine in May 5 18 12 - 86 13 8.5 58 3 - Average Temperature in Portland, Maine in May
Weather in Portland, Maine in June 11 23 17 - 81 12 9.6 61 3 - Average Temperature in Portland, Maine in June
Weather in Portland, Maine in July 14 26 20 - 74 10 10.2 60 2 - Average Temperature in Portland, Maine in July
Weather in Portland, Maine in August 13 26 19.5 - 61 10 9.4 60 2 - Average Temperature in Portland, Maine in August
Weather in Portland, Maine in September 8 21 15 - 89 10 7.8 61 3 - Average Temperature in Portland, Maine in September
Weather in Portland, Maine in October 3 15 9 - 81 9 6.5 60 3 - Average Temperature in Portland, Maine in October
Weather in Portland, Maine in November -2 9 4 - 107 11 4.5 64 3 - Average Temperature in Portland, Maine in November
Weather in Portland, Maine in December -9 2 -3.5 - 99 11 4.6 62 3 - Average Temperature in Portland, Maine in December

Portland, Maine Climograph/ Climate Chart (imperial)

Portland, Maine Temperature Chart

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Portland, Maine Temperatures in Farenheit

  Average Minimum Temperatures in Portland, Maine, Usa (°F) Average Maximum Temperature in Portland, Maine, Usa (°F) Average Temperature (°F) Average Sea Temp (°F) Average Precipitation/ Rainfall (in) Wet Days (>0.004 in) Average Sunlight Hours/ Day Relative Humidity (%) Average Wind Speed (Beaufort) Average Number of Days with Frost  
Temperatures in Portland, Maine in January 12 32 22 - 4.4 12 4.7 64 3 - Climate in Portland, Maine in January
Temperatures in Portland, Maine in February 12 34 23 - 3.8 11 5.8 61 3 - Climate in Portland, Maine in February
Temperatures in Portland, Maine in March 21 41 31 - 4.3 12 6.5 60 3 - Climate in Portland, Maine in March
Temperatures in Portland, Maine in April 32 52 42 - 3.7 12 7.0 58 3 - Climate in Portland, Maine in April
Temperatures in Portland, Maine in May 41 64 53 - 3.4 13 8.5 58 3 - Climate in Portland, Maine in May
Temperatures in Portland, Maine in June 52 73 63 - 3.2 12 9.6 61 3 - Climate in Portland, Maine in June
Temperatures in Portland, Maine in July 57 79 68 - 2.9 10 10.2 60 2 - Climate in Portland, Maine in July
Temperatures in Portland, Maine in August 55 79 67 - 2.4 10 9.4 60 2 - Climate in Portland, Maine in August
Temperatures in Portland, Maine in September 46 70 58 - 3.5 10 7.8 61 3 - Climate in Portland, Maine in September
Temperatures in Portland, Maine in October 37 59 48 - 3.2 9 6.5 60 3 - Climate in Portland, Maine in October
Temperatures in Portland, Maine in November 28 48 38 - 4.2 11 4.5 64 3 - Climate in Portland, Maine in November
Temperatures in Portland, Maine in December 16 36 26 - 3.9 11 4.6 62 3 - Climate in Portland, Maine in December

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Climate & Temperature > Usa > Portland, Maine

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