The Town FilesAffton, Missouri
Community in St. Louis County · population 20,417 (2020 Census)
- Median home
- $212,400
- Household income
- $79,539
- Jan low / Jul high
- 25° / 90°
- Snow a year
- 14 in
- Tornadoes ≤10 mi since 1950
- 38
- Median age
- 42.0
Affton is a community of 20,417 people in St. Louis County, Missouri. The median home is worth $212,400, above the typical Missouri town ($153,900). It ranks more of a college town than 94% of Missouri towns, more walkable than 93% of Missouri towns, more vibrant than 93% of Missouri towns.
How Affton ranks
Percentile among Missouri towns with at least 500 people on The Town Files lifestyle rankings. 50 is typical for the state; 90 means better than 90% of Missouri towns.
Homes and cost of living
The median home in Affton is worth $212,400, above the typical Missouri town ($153,900). Homes cost about 2.7 times the median household income of $79,539, which is more affordable than 54% of Missouri towns. Median rent is $1,015 a month. 80.8% of households own their home.
| Housing | Affton | Typical Missouri town |
|---|---|---|
| Median home value | $212,400 | $153,900 |
| Median rent | $1,015 | $855 |
| Median household income | $79,539 | $56,368 |
| Home value ÷ income | 2.7× | 2.7× |
| Homeownership | 80.8% | 67.4% |
| Median year built | 1958 | 1972 |
| Seasonal / vacation homes | 0.4% | — |
Who lives in Affton
| People | Affton | Typical Missouri town |
|---|---|---|
| Median age | 42.0 | 38.6 |
| Age 65 and over | 19.5% | 17.7% |
| Under 18 | 17.5% | — |
| Bachelor's degree or higher | 36.6% | 18.9% |
| Below the poverty line | 6.6% | 14.6% |
| Veterans | 7.5% | — |
| Born outside the U.S. | 11.0% | — |
| Work from home | 11.6% | 7.9% |
| Average commute | 23.5 min | 23.1 min |
| Homes with broadband | 92.0% | 88.7% |
Weather in Affton
July highs average 89.6°F and January lows 24.6°F. About 43.9 inches of rain and melted snow fall a year, with 13.8 inches of snow (typical Missouri town: 11.1 in). Expect about 47 days a year at 90°F or hotter and 79 nights at or below freezing.
Tornadoes, storms and disasters
38 tornadoes have passed within 10 miles of Affton since 1950, compared with 23 for the typical Missouri town. 10 rated (E)F2 or stronger. The strongest, an F4, struck on February 10, 1959 about 4.3 miles from the town center and killed 10. Tornadoes within 10 miles have caused 32 deaths and 432 injuries since 1950. The most recent was on June 21, 2026.
Hail of 1 inch or larger has been reported within 10 miles 343 times; the largest was 4.50 inches on May 25, 2011.
Severe weather in St. Louis County since 1996
St. Louis County has been included in 34 federal disaster or emergency declarations since 1953, most often for flood, drought, tornado.
| Declared | Incident | Declaration |
|---|---|---|
| June 9, 2025 | Severe Storm | DR-4877: Severe Storms, Straight-Line Winds, Tornadoes, And Flooding |
| May 21, 2025 | Severe Storm | DR-4867: Severe Storms, Straight-Line Winds, Tornadoes, And Wildfires |
| August 8, 2022 | Flood | DR-4665: Severe Storms And Flooding |
| March 26, 2020 | Biological | DR-4490: Covid-19 Pandemic |
| March 13, 2020 | Biological | EM-3482: Covid-19 |
Jobs and pay in St. Louis County
St. Louis County had 596,676 jobs in 2024, paying an average of $75,926 a year. Unemployment was 3% in 2023; in Affton itself the ACS puts it at 1.5%.
Public schools in Affton
2 public schools with 1,462 students, about 14.8 students per teacher.
| School | Grades | Students | Per teacher |
|---|---|---|---|
| AFFTON HIGH | 9-12 | 739 | 14.8 |
| MESNIER PRIMARY SCH. | PK-2 | 723 | 14.8 |
Towns near Affton
- Green Park, MO1.9 mi · 2,705 people · home $238,800
- Lemay, MO2.5 mi · 17,117 people · home $152,200
- Shrewsbury, MO2.5 mi · 6,406 people · home $269,800
- Crestwood, MO2.8 mi · 12,404 people · home $319,600
- Webster Groves, MO3.0 mi · 24,010 people · home $387,600
- Concord, MO3.0 mi · 17,668 people · home $303,600
- Sappington, MO3.0 mi · 7,995 people · home $297,600
- Mehlville, MO3.4 mi · 28,955 people · home $218,400
Affton questions
Is Affton, Missouri a good place to retire?
On The Town Files lifestyle rankings, Affton scores better for retirees than 47% of Missouri towns and quieter than 12%. 19.5% of residents are 65 or older (median age 42.0).
How much does a house cost in Affton?
The median owner-occupied home in Affton is valued at $212,400 (Census ACS 2020–2024), against a median household income of $79,539, so homes cost about 2.7 times income. Median rent is $1,015 a month.
What is the weather like in Affton?
July highs average 89.6°F and January lows 24.6°F (NOAA 1991–2020 normals). It gets about 43.9 inches of precipitation a year and 13.8 inches of snow.
Does Affton get tornadoes?
38 tornadoes have passed within 10 miles of Affton since 1950 (NOAA Storm Events); the strongest was a F4 on February 10, 1959. The typical Missouri town has had 23.
- U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024)
- U.S. Census Bureau, 2020 Census and 2025 Gazetteer (2020 / 2025)
- NOAA NCEI U.S. Climate Normals (1991–2020)
- NOAA NCEI Storm Events Database (1950–2026)
- FEMA OpenFEMA Disaster Declarations (this product uses the FEMA OpenFEMA API but is not endorsed by FEMA) (1953–2026)
- NCES Common Core of Data (2023–24)
- BLS Quarterly Census of Employment and Wages; USDA ERS county unemployment (BLS LAUS) (2000–2024)
- The Town Files lifestyle rankings, built from federal demographic, school, crime and housing data (2025)