and an average of 101.5 days with lows of or lower. Average January temperatures are a high of and a low of . Average July temperatures are a high of and a low of . The record high temperature was on June 26, 1988. The record low temperature was on January 19, 1994. Average annual precipitation is . Measurable precipitation occurs on an average of 105.6 days each year. The wettest year was 1990 with and the dryest year was 1988 with . The most precipitation in one month was in November 1985. The most precipitation in 24 hours was . Average annual snowfall is . Measurable snowfall occurs on only 2.6 days. The snowiest season was 1989–90 when fell. The most snow in one month was in December 1990. The most snow in 24 hours was on March 24, 1990. Education Public schools Elementary Schools South Knox Elementary School Tecumseh – Harrison Elementary Franklin Elementary Vigo Elementary Riley Elementary Washington Elementary (Decommissioned in May 2010) Middle School South Knox Middle-Highschool Clark Middle School High School South Knox Middle-Highschool Lincoln High School Parochial schools Elementary school Flaget Elementary (K–5) High school Vincennes Rivet High School (6–12) Other private schools Southwestern Indiana Youth Village (4–12) Higher education Vincennes University was established in 1801 as Jefferson Academy. It is the oldest college of higher learning in Indiana. Purdue Polytechnic Institute maintains a satellite campus in Vincennes in a partnership with Vincennes University. Demographics 2010 census As of the census of 2010, there were 18,423 people, 7,407 households, and 4,108 families residing in the city. The population density was . There were 8,259 housing units at an average density of . The racial makeup of the city was 91.9% White, 4.7% African American, 0.3% Native American, 0.7% Asian, 0.7% from other races, and 1.7% from two or more races. Hispanic or Latino of any race were 1.9% of the population. There were 7,407 households, of which 26.6% had children under the age of 18 living with them, 36.8% were married couples living together, 14.1% had a female householder with no husband present, 4.5% had a male householder with no wife present, and 44.5% were non-families. 36.0% of all households were made up of individuals, and 14.1% had someone living alone who was 65 years of age or older. The average household size was 2.19 and the average family size was 2.83. The median