Climate

Alton has a humid continental (Dfa) climate typical for the central Great Plains. Summers are hot and often very humid, with heavy rain from thunderstorms not uncommon, whilst tornadoes are a frequent hazard and are often followed by heavy rainfall. Winter weather varies greatly from warm or even hot weather due to chinook winds to extreme cold when a North American High with very cold air moves southwards from Canada. The coldest temperature recorded in Alton has been −31 °F or −35 °C on December 23, 1989.

One of the highest recorded temperatures in American history (and the highest in Kansas' recorded history) was recorded near Alton on July 24, 1936. On that day, the temperature maxed out at 121 °F or 49.4 °C. Only four states — California, Arizona, New Mexico and Nevada — have seen higher record temperatures.^[8] Alton's record April temperature of 106 °F or 41.1 °C on April 23 of 1989 has been exceeded only by California, Arizona and Texas.^[9] Temperatures over 100 °F or 37.8 °C are expected on 15.9 each year and 90 °F or 32.2 °C on an average of 64.5 days per year.

The lowest temperature ever recorded in Kansas was measured in Lebanon, which sits in the adjacent Smith County, only about 35 miles away.^[10]

2020 census

The 2020 United States census counted 100 people, 35 households, and 21 families in Alton.^[13][14] The population density was 323.6 per square mile (125.0/km²). There were 63 housing units at an average density of 203.9 per square mile (78.7/km²).^[14][15] The racial makeup was 97.0% (97) white or European American (96.0% non-Hispanic white), 0.0% (0) black or African-American, 0.0% (0) Native American or Alaska Native, 0.0% (0) Asian, 0.0% (0) Pacific Islander or Native Hawaiian, 1.0% (1) from other races, and 2.0% (2) from two or more races.^[16] Hispanic or Latino of any race was 1.0% (1) of the population.^[17]

Of the 35 households, 17.1% had children under the age of 18; 42.9% were married couples living together; 20.0% had a female householder with no spouse or partner present. 37.1% of households consisted of individuals and 11.4% had someone living alone who was 65 years of age or older.^[14] The average household size was 2.0 and the average family size was 3.0.^[18] The percent of those with a bachelor’s degree or higher was estimated to be 7.0% of the population.^[19]

28.0% of the population was under the age of 18, 6.0% from 18 to 24, 18.0% from 25 to 44, 30.0% from 45 to 64, and 18.0% who were 65 years of age or older. The median age was 42.5 years. For every 100 females, there were 96.1 males.^[14] For every 100 females ages 18 and older, there were 89.5 males.^[14]

The 2016-2020 5-year American Community Survey estimates show that the median household income was $47,969 (with a margin of error of +/- $13,979) and the median family income was $48,594 (+/- $8,951).^[20] The median income for those above 16 years old was $36,875 (+/- $26,308).^[21] Approximately, 17.4% of families and 21.9% of the population were below the poverty line, including 25.0% of those under the age of 18 and 11.8% of those ages 65 or over.^[22][23]

2010 census

As of the census^[24] of 2010, there were 103 people, 47 households, and 22 families residing in the city. The population density was 332.3 inhabitants per square mile (128.3/km²). There were 68 housing units at an average density of 219.4 per square mile (84.7/km²). The racial makeup of the city was 97.1% White and 2.9% from two or more races.

There were 47 households, of which 21.3% had children under the age of 18 living with them, 38.3% were married couples living together, 8.5% had a female householder with no husband present, and 53.2% were non-families. 40.4% of all households were made up of individuals, and 21.3% 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 2.77.

The median age in the city was 48.3 years. 18.4% of residents were under the age of 18; 6% were between the ages of 18 and 24; 22.4% were from 25 to 44; 25.3% were from 45 to 64; and 28.2% were 65 years of age or older. The gender makeup of the city was 52.4% male and 47.6% female.

2000 census

As of the census^[25] of 2000, there were 117 people, 58 households, and 33 families residing in the city. The population density was 373.7 inhabitants per square mile (144.3/km²). There were 79 housing units at an average density of 252.3 per square mile (97.4/km²). The racial makeup of the city was 98.29% White, and 1.71% from two or more races. Hispanic or Latino of any race were 1.71% of the population.

There were 58 households, out of which 25.9% had children under the age of 18 living with them, 48.3% were married couples living together, 5.2% had a female householder with no husband present, and 41.4% were non-families. 37.9% of all households were made up of individuals, and 15.5% had someone living alone who was 65 years of age or older. The average household size was 2.02 and the average family size was 2.65.

In the city, the population was spread out, with 18.8% under the age of 18, 9.4% from 18 to 24, 26.5% from 25 to 44, 21.4% from 45 to 64, and 23.9% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 95.0 males. For every 100 females age 18 and over, there were 106.5 males.

The median income for a household in the city was $23,750, and the median income for a family was $33,125. Males had a median income of $20,000 versus $21,875 for females. The per capita income for the city was $15,584. There were 7.4% of families and 17.6% of the population living below the poverty line, including 9.1% of under eighteens and 8.0% of those over 64.