Plant roots spread out on the surface to take in water. They don't grow deep because the soil is always freezing and thawing which breaks up roots. One of their adaptions to the cold climate is tiny hairs on their leaves to help keep in moisture. The animals of the tundra include fish, birds, mammals and insects.
7.6. The highest average temperature in Salem is July at 69.1 degrees. The coldest average temperature in Salem is December at 38.8 degrees. The most monthly precipitation in Salem occurs in December with 7.6 inches. The Salem weather information is based on the average of the previous 3-7 years of data.he Salem, OR air quality index is 3.7% less than the Oregon average and 37.6% less than the national average.
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.