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Affton, MO
Full City Profile · Missouri
3.6
/5.0
B+
Good
20,035
Population
4,384/sq mi density
$77,337
Median Income
$43,832 per capita
$200,300
Home Value
$235,292 Zillow
$978
Median Rent
25.4% income on rent
58°F
Avg Temperature
293 sunny days/yr
491
Violent Crime/100K
1,052 property/100K
B+
Overall
3.6 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.5 / 5.0
$77,337 median income, 1.8% unemployment
A+
Affordability
5.0 / 5.0
$200,300 home value, $978/mo rent
F
Safety
1.0 / 5.0
491 violent crimes/100K (29% above avg)
B+
Education
3.8 / 5.0
35.0% bachelor's degree or higher
Affton enjoys a temperate climate with an average annual temperature of 58°F (14°C). Winters average 38°F in January while summers reach 78°F in July. The area gets 293 sunny days per year. Annual precipitation totals 45.6 inches. The area receives 7.6 inches of snow annually. Air quality is rated Good with a median AQI of 41.
Temperature
38°F Jan (3°C)
78°F Jul (26°C)
| Annual Average | 58.2°F |
| 8% above US avg | |
| January Average | 38°F (3°C) |
| July Average | 78°F (26°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 620 ft (189 m) |
| Area | 4.6 sq mi (11.9 km²) |
| Population Density | 4,384/sq mi |
| Coordinates | 38.5506°N, 90.3332°W |
| Timezone | America/Chicago |
| Nearest Airport | St Louis Lambert International (STL) 14 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 38°F (3°C) | 2.0 in | Driest |
| February | 35°F (2°C) | 2.2 in | |
| March | 45°F (7°C) | 3.5 in | |
| April | 56°F (13°C) | 3.7 in | |
| May | 66°F (19°C) | 4.1 in | Wettest |
| June | 75°F (24°C) | 3.6 in | |
| July | 78°F (26°C) | 3.7 in | Warmest |
| August | 77°F (25°C) | 3.2 in | |
| September | 70°F (21°C) | 3.3 in | |
| October | 58°F (15°C) | 2.8 in | |
| November | 46°F (8°C) | 3.5 in | |
| December | 34°F (1°C) | 3.0 in | Coldest |
Affton has a seasonal temperature swing of 44°F / from 34°F in December to 78°F in July. Total annual precipitation is 38.6 inches, with May being the wettest month (4.1") and January the driest (2.0").