O'Fallon, MO
Full City Profile · Missouri
3.8
/5.0
B+
Good
92,697
Population
3,034/sq mi density
$107,203
Median Income
$47,429 per capita
$305,100
Home Value
$465,147 Zillow
$1,400
Median Rent
25.1% income on rent
56°F
Avg Temperature
61
Violent Crime/100K
490 property/100K
B+
Overall
3.8 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.9 / 5.0
$107,203 median income, 2.7% unemployment
A+
Affordability
5.0 / 5.0
$305,100 home value, $1,400/mo rent
F
Safety
1.0 / 5.0
61 violent crimes/100K
A
Education
4.4 / 5.0
42.4% bachelor's degree or higher
O'Fallon enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 32°F in January while summers reach 79°F in July. Annual precipitation totals 39.8 inches. The area receives 14.8 inches of snow annually.
Temperature
32°F Jan (-0°C)
79°F Jul (26°C)
| Annual Average | 56.1°F |
| 4% above US avg | |
| January Average | 32°F (-0°C) |
| July Average | 79°F (26°C) |
Geography
| Elevation | 548 ft (167 m) |
| Area | 30.6 sq mi (79.1 km²) |
| Population Density | 3,034/sq mi |
| Coordinates | 38.8106°N, 90.6999°W |
| Timezone | America/Chicago |
| Nearest Airport | St Louis Lambert International (STL) 18 miles away |
Precipitation & Snow
Air Quality
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (-0°C) | 2.4 in | Coldest |
| February | 36°F (2°C) | 2.0 in | Driest |
| March | 46°F (8°C) | 3.5 in | |
| April | 56°F (14°C) | 4.6 in | Wettest |
| May | 66°F (19°C) | 4.6 in | |
| June | 75°F (24°C) | 4.3 in | |
| July | 79°F (26°C) | 3.3 in | Warmest |
| August | 77°F (25°C) | 3.4 in | |
| September | 69°F (20°C) | 3.0 in | |
| October | 57°F (14°C) | 3.1 in | |
| November | 45°F (7°C) | 3.3 in | |
| December | 36°F (2°C) | 2.3 in |
O'Fallon has a seasonal temperature swing of 47°F / from 32°F in January to 79°F in July. Total annual precipitation is 39.8 inches, with April being the wettest month (4.6") and February the driest (2.0").