average low temperatures for coastal oregon
South Coast. Gold Beach, Brookings and other southern Oregon coastal towns enjoy slightly warmer temperatures year round. Average winter high temperatures range from 55 to 58 degrees, with lows around 41 to 45 degrees. Precipitation is about 11 to 13 inches monthly in winter, drying out to just a half inch during July.s expected, winters are wet along the northern Oregon coast towns such as Astoria, Seaside and Tillamook. Tillamook has the highest monthly precipitation average in the region, which peaks in December at just under 14 inches.