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Weather in Sarnia for March 2026

Your guide to Sarnia weather in March - trends and predictions

    Official Weather Alert ⚠️

  • High Wind Warning - See hour by hour.

    • Snow Forecast ❄️

  • The climate of Sarnia in March is quite snowy, averaging 15 snowy days.
    According to Sarnia snow forecast for March 2026, 11 snowy days are expected in the next 2 weeks. The closest date with snow is Friday, 13 March.

    • Temperatures

  • So far, March 2026 in Sarnia is slightly warmer than the historical average by 0.7 °C.

  • Expect cooler weather in the next days in Sarnia with the forecast suggesting a temperature of 3.1 °C, lower than the historical average.

  • In general, the average temperature in Sarnia at the beginning of March is 4.3 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 5.6 °C by the end of March.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
7
Dry days
Average rainy days
9
Rainy days
Average snowy days
15
Snow days
Average temperatures
6°/0°
Temperatures
Average wind speed
29 km/h
Avg max wind
Average humidity
77 %
Avg humidity

Sarnia Weather March

Move between months or click on a day
February
April
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Overcast
2°
2
Light snow
2°
3
Partly cloudy
5°
4
Overcast
5°
5
Light snow
6°
6
Light rain shower
3°
7
Partly cloudy
7°
8
Overcast
6°
9
Overcast
9°
10
Heavy snow
5°
11
Light snow showers
7°
12
Overcast
7°
13
Weather Alert Patchy rain possible
7°
14
Weather Alert Patchy moderate snow
2°
15
Overcast
11°
16
Moderate rain
12°
17
Blowing snow
-5°
18
Patchy moderate snow
-2°
19
Cloudy
5°
20
Light rain
2°
21
Overcast
3°
22
Cloudy
7°
23
Light freezing rain
1°
24
Moderate snow
2°
25
Heavy snow
0°
26
Light snow
-1°
27
Heavy snow
7°
28
Overcast
6°
29
Heavy snow
8°
30
Moderate rain
10°
31
Moderate rain
9°

Temperatures trend during March in Sarnia

See the weather trend as well as the moving average line

March weather in Sarnia day by day

Click on a date for more information
February April
Date Weather Temperatures Rain Snow More
1 Mar. Overcast
Overcast
 2° /-4° 0.3 mm 0 cm
2 Mar. Light snow
Light snow
 2° /-5° 0.2 mm 0 cm
3 Mar. Partly cloudy
Partly cloudy
 5° /-2° 0.9 mm 0.3 cm
4 Mar. Overcast
Overcast
 5° /0° 13.8 mm 1 cm
5 Mar. Light snow
Light snow
 6° /1° 18 mm 0 cm
6 Mar. Light rain shower
Light rain shower
 3° /-1° 4.4 mm 1.9 cm
7 Mar. Partly cloudy
Partly cloudy
 7° /1° 2 mm 0 cm
8 Mar. Overcast
Overcast
 6° /-1° 2.1 mm 0 cm
9 Mar. Overcast
Overcast
 9° /0° 6.8 mm 0.4 cm
10 Mar. Heavy snow
Heavy snow
 5° /-1° 9.7 mm 1.2 cm
11 Mar. Light snow showers
Light snow showers
 7° /-2° 21.9 mm 0 cm
12 Mar. Overcast
Overcast
 7° /-2° 0.7 mm 0.2 cm
13 Mar. Patchy rain possible
Patchy rain possible
 7° /-3° 1.8 mm 0.7 cm
14 Mar. Patchy moderate snow
Patchy moderate snow
 2° /-4° 0.7 mm 0.5 cm
15 Mar. Overcast
Overcast
 11° /-2° 0 mm 0 cm
16 Mar. Moderate rain
Moderate rain
 12° /-6° 15.3 mm 0 cm
17 Mar. Blowing snow
Blowing snow
 -5° /-8° 1 mm 0 cm
18 Mar. Patchy moderate snow
Patchy moderate snow
 -2° /-7° 0.8 mm 0.5 cm
19 Mar. Cloudy
Cloudy
 5° /-1° 0.1 mm 0 cm
20 Mar. Light rain
Light rain
 2° /-1° 2.4 mm 0.2 cm
21 Mar. Overcast
Overcast
 3° /-2° 0.1 mm 0.1 cm
22 Mar. Cloudy
Cloudy
 7° /2° 0.1 mm 0 cm
23 Mar. Light freezing rain
Light freezing rain
 1° /-1° 0.1 mm 0.1 cm
24 Mar. Moderate snow
Moderate snow
 2° /-4° 1 mm 0.7 cm
25 Mar. Heavy snow
Heavy snow
 0° /-5° 4.5 mm 3.2 cm
26 Mar. Light snow
Light snow
 -1° /-7° 0.1 mm 0.1 cm
27 Mar. Heavy snow
Heavy snow
 7° /0° 6.6 mm 3.5 cm
28 Mar. Overcast
Overcast
 6° /-1° 0 mm 0 cm
29 Mar. Heavy snow
Heavy snow
 8° /1° 2.2 mm 0.6 cm
30 Mar. Moderate rain
Moderate rain
 10° /2° 9 mm 0 cm
31 Mar. Moderate rain
Moderate rain
 9° /0° 6 mm 0 cm
Next
Important Notice
Our weather forecast for Sarnia in March is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Sarnia forecast closer to your planned date for the most up-to-date weather information.
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Sarnia in March - FAQ

What are the expected maximum and minimum temperatures in Sarnia during March?

Prepare for cooler days with highs just around 6° and colder nights, dipping below 0°.

How much rainfall should be expected in Sarnia during March?

Significant rainfall exceeding 171.1 mm is expected in Sarnia during March, occurring over more than 9 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Sarnia in March 2026?

Sarnia experiences an average snowfall of 17.63 cm during March, occurring over 15 days.

What are the typical wind conditions in Sarnia during March?

The average wind speed in Sarnia during March is 29 km/h, suggesting breezy to windy conditions, depending on your activities.

Sarnia snow forecast March 2026

Track daily snowfall levels and discover Sarnia’s snowy potential this March ❄️
On average, Sarnia sees 15 snowy days during March, with approximately 17.6 cm of total snowfall.

March rainfall patterns in Sarnia

Explore the daily rainfall trends and prepare for Sarnias March weather 💧
Typically, Sarnia has 9 rainy days in March with a total of 171.1 mm of rainfall.

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Location coordinates Where is Sarnia?

Get accurate weather forecasts for Sarnia, located at latitude 42.979 and longitude -82.404. Stay updated with localized weather information tailored for Sarnia.

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