🇨🇦 Weather in Sarnia
Current Weather in Sarnia
Beach Hazards Statement issued May 23 at 4:01PM EDT until May 24 at 12:00AM EDT by NWS Detroit/Pontiac MI
11°C
Feels like 10°C. Overcast.
Map Overlays:
Hourly Forecast for Sarnia
04:00
11°
0%
05:00
11°
79%
06:00
11°
61%
07:00
12°
0%
08:00
12°
0%
09:00
12°
0%
10:00
13°
0%
11:00
13°
0%
12:00
14°
0%
13:00
15°
0%
14:00
16°
0%
15:00
17°
0%
16:00
17°
0%
17:00
16°
0%
18:00
15°
100%
19:00
14°
100%
20:00
14°
87%
21:00
13°
0%
22:00
13°
0%
23:00
12°
0%
00:00
12°
0%
01:00
12°
0%
02:00
12°
0%
03:00
11°
0%
14-Day Forecast for Sarnia
Sun, May 24
Patchy rain nearby
18° /
11°
Mon, May 25
Partly Cloudy
21° /
10°
Tue, May 26
Sunny
24° /
13°
Wed, May 27
Patchy rain nearby
22° /
10°
Thu, May 28
Partly Cloudy
17° /
9°
Fri, May 29
Moderate rain
20° /
13°
Sat, May 30
Patchy rain nearby
11° /
8°
Sun, May 31
Partly Cloudy
14° /
7°
Mon, Jun 01
Sunny
15° /
8°
Tue, Jun 02
Sunny
18° /
11°
Wed, Jun 03
Partly Cloudy
21° /
11°
Thu, Jun 04
Sunny
22° /
16°
Fri, Jun 05
Patchy rain nearby
17° /
9°
Sat, Jun 06
Sunny
17° /
8°
Additional Forecasts for Sarnia
Air Quality
💨 US EPA Index 1 (Good)
CO (Carbon Monoxide) 153.8 μg/m³
O₃ (Ozone) 32.0 μg/m³
NO₂ (Nitrogen Dioxide) 11.2 μg/m³
SO₂ (Sulphur Dioxide) 2.1 μg/m³
PM2.5 (Fine particles) 5.5 μg/m³
PM10 (Coarse particles) 5.5 μg/m³
Historical Weather
Weather Forecasts for Other Cities in Canada
Frequently Asked Questions about Weather in Sarnia
What is the temperature in Sarnia right now?
The current temperature in Sarnia is 11°C (53°F), overcast (feels like 10°C).
What's the weather like in Sarnia right now?
Conditions in Sarnia right now: Overcast, humidity 94%, wind 16 km/h SW.
What is today's forecast for Sarnia?
Today in Sarnia: high 18°C, low 11°C, patchy rain nearby. Chance of rain: 87%.
What is the 7-day weather forecast for Sarnia?
Daily highs and lows for Sarnia:
- 2026-05-24: 18°C / 11°C
- 2026-05-25: 21°C / 10°C
- 2026-05-26: 24°C / 13°C
- 2026-05-27: 22°C / 10°C
- 2026-05-28: 17°C / 9°C
- 2026-05-29: 20°C / 13°C
- 2026-05-30: 11°C / 8°C
Is it going to rain in Sarnia today?
There is a 87% chance of rain in Sarnia today. Total expected precipitation: 0.45 mm.
What is the wind speed in Sarnia right now?
Wind in Sarnia is currently 16 km/h (10 mph) from the SW.
What is the UV index in Sarnia right now?
The UV index in Sarnia is currently 0 (low). Sun protection is recommended when the index is 3 or higher.
