O'Fallon
City in Illinois, United States
Overview
O'Fallon is a city in United States.
Geographic Context
Jurisdiction
United States
State
Illinois
Population
91,316
Time Zone
America/Chicago
Coordinates
38.59°, -89.91°
Key Metrics
Safety Score
75
Female Safety
78
LGBTQ+ Safety
65
Traffic Safety
70
Food Safety
95
Monthly Cost
$2,479
Local Cost
$1,530
Local Income
$3,100
Cashless
80
English
100
Temperature
13.0°C
Summer Avg
24.8°C
Winter Avg
0.3°C
Record High
42.5°C
Record Low
-23.0°C
Humidity
76%
Precipitation
1105 mm
Internet Speed
222 Mbps
Upload
23 Mbps
Latency
20 ms
City Vibrancy
15
Coworking
0
Cafes
4
Nightlife
3
Parks
8
Transport
0
Walk Score
0
Footways
—
Airport
BLV
Distance
9 km
Explore
Frequently Asked Questions
Sources: Ookla | Teleport | OpenStreetMap · Last updated: 2025