The NRO is part of the Department of Defense. The Director of the NRO is appointed by the Secretary of Defense with the consent of the Director of National Intelligence, without confirmation from Congress.
Portland: Annual Weather Averages. July is the hottest month in Portland with an average temperature of 21Â°C (69Â°F) and the coldest is January at -6Â°C (21Â°F). The wettest month is September with an average of 140mm of rain. Average Temperature: Portland.
1 Come autumn/ fall temperatures decrease achieving average highs of 14.6Â°C (58.3Â°F) during the day and lows of 4Â°C (39.2Â°F) generally shortly after sunrise. 2  Total annual Precipitation averages 1126.3 mm (44.3 inches) which is equivalent to 1126.3 Litres/m (27.63 Gallons/ft). According to the Holdridge life zones system of bioclimatic classification Portland, Maine is situated in or near the cool temperate wet forest biome. 2  The annual average temperature is 7.4 degrees Celsius (45.3 degrees Fahrenheit).