Sarnia
City in Ontario, Canada
Overview
Sarnia is a lakeside city in southwestern Ontario, best known for its beautiful waterfront along the St. Clair River and access to Lake Huron. The city blends historic charm with plenty of outdoor activities, making it a relaxing destination for both locals and visitors.
Geographic Context
Jurisdiction
Canada
Province
Ontario
Population
72,320
Time Zone
America/Toronto
Coordinates
42.98°, -82.40°
Key Metrics
Safety Score
80
Female Safety
82
LGBTQ+ Safety
75
Traffic Safety
77
Food Safety
95
Monthly Cost
$2,339
Local Cost
$1,580
Local Income
$2,800
Cashless
87
English
98
Temperature
8.6°C
Summer Avg
20.4°C
Winter Avg
-3.5°C
Record High
34.5°C
Record Low
-30.0°C
Humidity
79%
Precipitation
826 mm
Internet Speed
196 Mbps
Upload
102 Mbps
Latency
16 ms
City Vibrancy
80
Coworking
0
Cafes
10
Nightlife
8
Parks
62
Transport
0
Walk Score
0
Footways
—
Airport
YZR
Distance
8 km
Explore
Frequently Asked Questions
Data sources
Source-backed data
NASA POWER - Climate normals and monthly weather measurements rendered as city weather metrics. Updated 2026-03-22.
World Air Quality Index - Latest available city-level air quality station measurement. Updated 2025-12-05.
Ookla Open Data - Internet speed aggregates for 2024Q3 from 40 tests. Updated 2025-12-05.
OpenStreetMap - Nearby amenities counted from OpenStreetMap-derived city extracts. Updated 2025-12-06.
OpenStreetMap transport extract - Walkability, footway density, and airport access metrics derived from mapped transport features. Updated 2025-12-05.
Oyster List city price model - City price estimates calibrated from local price surveys and jurisdiction-level cost signals. Updated 2026-01-14.
Estimated data
Oyster List AI-assisted estimates - Safety, lifestyle, income, and practical scores are model-assisted estimates derived from source-backed country and city signals. Confidence 86/100.