The Town FilesArnold, Missouri
City in Jefferson County · population 20,858 (2020 Census)
- Median home
- $220,000
- Household income
- $78,370
- Jan low / Jul high
- 22° / 88°
- Snow a year
- 10 in
- Tornadoes ≤10 mi since 1950
- 32
- Median age
- 39.7
Arnold is a city of 20,858 people in Jefferson County, Missouri. The median home is worth $220,000, above the typical Missouri town ($153,900). It ranks more vibrant than 83% of Missouri towns, more upscale than 70% of Missouri towns.
How Arnold 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 Arnold is worth $220,000, above the typical Missouri town ($153,900). Homes cost about 2.8 times the median household income of $78,370, which is more affordable than 47% of Missouri towns. Median rent is $1,112 a month. 79.8% of households own their home.
| Housing | Arnold | Typical Missouri town |
|---|---|---|
| Median home value | $220,000 | $153,900 |
| Median rent | $1,112 | $855 |
| Median household income | $78,370 | $56,368 |
| Home value ÷ income | 2.8× | 2.7× |
| Homeownership | 79.8% | 67.4% |
| Median year built | 1977 | 1972 |
| Seasonal / vacation homes | 0.5% | — |
Who lives in Arnold
| People | Arnold | Typical Missouri town |
|---|---|---|
| Median age | 39.7 | 38.6 |
| Age 65 and over | 19.5% | 17.7% |
| Under 18 | 20.7% | — |
| Bachelor's degree or higher | 25.4% | 18.9% |
| Below the poverty line | 8.2% | 14.6% |
| Veterans | 6.3% | — |
| Born outside the U.S. | 5.3% | — |
| Work from home | 8.1% | 7.9% |
| Average commute | 27.2 min | 23.1 min |
| Homes with broadband | 91.4% | 88.7% |
Weather in Arnold
July highs average 88.4°F and January lows 22.3°F. About 43.6 inches of rain and melted snow fall a year, with 10.4 inches of snow (typical Missouri town: 11.1 in). Expect about 38 days a year at 90°F or hotter and 105 nights at or below freezing.
Tornadoes, storms and disasters
32 tornadoes have passed within 10 miles of Arnold since 1950, compared with 23 for the typical Missouri town. 9 rated (E)F2 or stronger. The strongest, an F4, struck on February 25, 1956 about 7.4 miles from the town center and killed 6. Tornadoes within 10 miles have caused 7 deaths and 46 injuries since 1950. The most recent was on July 11, 2026.
Hail of 1 inch or larger has been reported within 10 miles 207 times; the largest was 3.00 inches on May 25, 2011.
Severe weather in Jefferson County since 1996
Jefferson County has been included in 30 federal disaster or emergency declarations since 1953, most often for flood, drought, tornado.
| Declared | Incident | Declaration |
|---|---|---|
| May 21, 2025 | Severe Storm | DR-4867: Severe Storms, Straight-Line Winds, Tornadoes, And Wildfires |
| March 26, 2020 | Biological | DR-4490: Covid-19 Pandemic |
| March 13, 2020 | Biological | EM-3482: Covid-19 |
| July 9, 2019 | Severe Storm | DR-4451: Severe Storms, Tornadoes, And Flooding |
| June 2, 2017 | Flood | DR-4317: Severe Storms, Tornadoes, Straight-Line Winds And Flooding |
Jobs and pay in Jefferson County
Jefferson County had 49,458 jobs in 2024, paying an average of $49,615 a year. Unemployment was 2.8% in 2023; in Arnold itself the ACS puts it at 2.8%.
Public schools in Arnold
12 public schools with 6,134 students, about 13.6 students per teacher.
| School | Grades | Students | Per teacher |
|---|---|---|---|
| FOX SR. HIGH | 9-12 | 1,659 | 18.4 |
| FOX MIDDLE | 6-8 | 622 | 13.0 |
| RIDGEWOOD MIDDLE | 6-8 | 598 | 13.9 |
| HAGEMANN ELEM. | K-5 | 435 | 16.7 |
| ROGERS ELEM. | K-5 | 421 | 17.5 |
| LONE DELL ELEM. | K-5 | 402 | 11.2 |
| MERAMEC HEIGHTS ELEM. | K-5 | 400 | 11.4 |
| ROCKPORT HEIGHTS ELEM. | K-5 | 393 | 12.3 |
| RICHARD SIMPSON ELEM. | K-5 | 380 | 10.3 |
| SHERWOOD ELEM. | K-5 | 347 | 11.2 |
| FOX ELEM. | K-5 | 346 | 10.8 |
| DON EARL EARLY CHILDHOOD CTR. | PK-PK | 131 | 7.3 |
Towns near Arnold
- Oakville, MO3.2 mi · 36,301 people · home $318,600
- Imperial, MO5.1 mi · 4,407 people · home $228,700
- Concord, MO6.0 mi · 17,668 people · home $303,600
- Mehlville, MO6.1 mi · 28,955 people · home $218,400
- Barnhart, MO6.4 mi · 5,832 people · home $229,200
- Sappington, MO6.9 mi · 7,995 people · home $297,600
- Green Park, MO6.9 mi · 2,705 people · home $238,800
- Sunset Hills, MO7.6 mi · 9,198 people · home $523,800
Arnold questions
Is Arnold, Missouri a good place to retire?
On The Town Files lifestyle rankings, Arnold scores better for retirees than 27% of Missouri towns and quieter than 34%. 19.5% of residents are 65 or older (median age 39.7).
How much does a house cost in Arnold?
The median owner-occupied home in Arnold is valued at $220,000 (Census ACS 2020–2024), against a median household income of $78,370, so homes cost about 2.8 times income. Median rent is $1,112 a month.
What is the weather like in Arnold?
July highs average 88.4°F and January lows 22.3°F (NOAA 1991–2020 normals). It gets about 43.6 inches of precipitation a year and 10.4 inches of snow.
Does Arnold get tornadoes?
32 tornadoes have passed within 10 miles of Arnold since 1950 (NOAA Storm Events); the strongest was a F4 on February 25, 1956. 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)