 It has a humid continental climate ("Dfa"/"Dfb") and average monthly temperatures in the city of Washington range from 28.3 °F in January to 71.5 °F in July.As of the census of 2000, there were 202,897 people, 81,130 households, and 56,060 families residing in the county.The population density was 237 people per square mile (91/km²).