Sarnia, Canada Climate
Canada
Pop. 72,125 Elev. 185 m / 607 ft
TZ: America/Toronto (UTC-4) ·
Sarnia has a dry climate with warm summers reaching 81°F (27°C) in July and cold winters averaging 18°F (-8°C) in January. Humidity pushes the summer feels-like temperature to 86°F (30°C), while wind chill can drive winter lows to 9°F (-13°C). Rain falls on about 43 days per year (25.3 in / 643 mm total), with snow on 5 days and 54 in (1359 mm) of annual accumulation. The city averages 103 sunny days per year and around 21 thunderstorm days. Ocean water temperatures reach 72°F (22°C) in summer.
| Temperature | 27°C (81°F) high | -8°C (18°F) low |
| Feels like | 30°C (86°F) high | -13°C (9°F) low |
| Rain | 43 days | 643 mm (25.3 in) /yr |
| Snow | 5 days | 1359 mm (53.5 in) /yr |
| Sky | 103 sunny | 21 stormy |
| Wind | 1.3 m/s (3.0 mph) avg |
Looking for a place with a climate like Sarnia? Explore and filter 150,000+ cities worldwide.
Explore on the MapMonthly Climate Chart
Best months to visit: Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
71
Jan 78
Feb 67
Mar 68
Apr 65
May 54
Jun 50
Jul 41
Aug 38
Sep 42
Oct 62
Nov 77
Dec Humidity (%)
69
Jan 74
Feb 67
Mar 64
Apr 75
May 71
Jun 75
Jul 74
Aug 75
Sep 74
Oct 71
Nov 75
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 90 km Windsor International Airport (YQG)
Ski resort 82 km Pine Knob Ski & Snowboard Resort
National park 56 km Pinery Provincial Park
Hospital 2 km Bluewater Health - Sarnia
Hiking trail 6 km Wawanosh Wetlands Conservation Area
Interested in Sarnia?
Hotels
Flights
Real Estate
Insurance
Connectivity
Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | -2°C 28°F | -8°C 18°F | 11 mm 0.5 in | 273 mm10.7 in | 3 |
| February | -1°C 30°F | -7°C 20°F | 4 mm 0.2 in | 474 mm18.7 in | 1 |
| March | 9°C 48°F | 0°C 31°F | 71 mm 2.8 in | 67 mm2.6 in | 6 |
| April | 13°C 56°F | 4°C 39°F | 68 mm 2.7 in | 62 mm2.4 in | 5 |
| May | 17°C 62°F | 9°C 49°F | 78 mm 3.1 in | — | 7 |
| June | 25°C 77°F | 16°C 62°F | 90 mm 3.6 in | — | 9 |
| July | 27°C 81°F | 19°C 67°F | 78 mm 3.1 in | — | 10 |
| August | 25°C 77°F | 17°C 62°F | 43 mm 1.7 in | — | 16 |
| September | 23°C 73°F | 13°C 56°F | 51 mm 2.0 in | — | 18 |
| October | 17°C 62°F | 9°C 48°F | 67 mm 2.6 in | — | 18 |
| November | 8°C 46°F | 2°C 35°F | 26 mm 1.0 in | 178 mm7.0 in | 8 |
| December | 0°C 33°F | -6°C 22°F | 53 mm 2.1 in | 305 mm12.0 in | 2 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 3 | 0 |
| February | 1 | 0 |
| March | 6 | 2 |
| April | 5 | 3 |
| May | 7 | 3 |
| June | 9 | 5 |
| July | 10 | 2 |
| August | 16 | 3 |
| September | 18 | 1 |
| October | 18 | 1 |
| November | 8 | 0 |
| December | 2 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 4°C 40°F | 0°C 32°F |
| February | 1°C 33°F | 0°C 32°F |
| March | 1°C 34°F | 2°C 36°F |
| April | 6°C 42°F | 7°C 45°F |
| May | 9°C 49°F | 13°C 55°F |
| June | 19°C 66°F | 21°C 69°F |
| July | 22°C 72°F | 25°C 77°F |
| August | 22°C 72°F | 22°C 72°F |
| September | 19°C 65°F | 19°C 66°F |
| October | 18°C 64°F | 14°C 57°F |
| November | 11°C 51°F | 5°C 41°F |
| December | 7°C 44°F | 0°C 32°F |