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Weather in St. Catharines for March 2026

Your guide to St. Catharines weather in March - trends and predictions

    Official Weather Alert ⚠️

  • Wind Advisory - See hour by hour.

    • Snow Forecast ❄️

  • St. Catharines typically experiences moderate snowfall in March, with an average of 10 snowy days.
    According to St. Catharines snow forecast for March 2026, 5 snowy days are expected until the end of the month. The closest date with snow is Thursday, 19 March.

    • Temperatures

  • So far, March 2026 in St. Catharines is slightly warmer than the historical average by 0.8 °C.

  • The forecast for the next days in St. Catharines predicts temperatures to be around 4 °C, close to the historical average.

  • In general, the average temperature in St. Catharines at the beginning of March is 4.3 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 6.6 °C by the end of March.

    • More

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

Average dry days
6
Dry days
Average rainy days
15
Rainy days
Average snowy days
10
Snow days
Average temperatures
6°/0°
Temperatures
Average wind speed
32 km/h
Avg max wind
Average humidity
76 %
Avg humidity

St. Catharines Weather March

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

Temperatures trend during March in St. Catharines

See the weather trend as well as the moving average line

March weather in St. Catharines day by day

Click on a date for more information
February April
Date Weather Temperatures Rain Snow More
1 Mar. Overcast
Overcast
 2° /-4° 2.9 mm 2.1 cm
2 Mar. Cloudy
Cloudy
 1° /-4° 0.1 mm 0 cm
3 Mar. Blizzard
Blizzard
 3° /-2° 5.1 mm 0.2 cm
4 Mar. Heavy snow
Heavy snow
 6° /0° 3.6 mm 0.8 cm
5 Mar. Light snow
Light snow
 7° /2° 11.8 mm 0.6 cm
6 Mar. Moderate snow
Moderate snow
 5° /0° 11.9 mm 0.4 cm
7 Mar. Blizzard
Blizzard
 6° /1° 1 mm 0.7 cm
8 Mar. Overcast
Overcast
 5° /-1° 0.1 mm 0 cm
9 Mar. Overcast
Overcast
 8° /0° 2.9 mm 0 cm
10 Mar. Blizzard
Blizzard
 6° /0° 5.4 mm 0 cm
11 Mar. Overcast
Overcast
 8° /0° 20 mm 0 cm
12 Mar. Overcast
Overcast
 5° /-1° 2.2 mm 0.2 cm
13 Mar. Overcast
Overcast
 6° /1° 2.2 mm 0.9 cm
14 Mar. Heavy snow
Heavy snow
 5° /0° 6 mm 0.2 cm
15 Mar. Patchy rain possible
Patchy rain possible
 17° /-2° 1.3 mm 0 cm
16 Mar. Moderate rain
Moderate rain
 14° /-3° 6.6 mm 0 cm
17 Mar. Moderate or heavy snow showers
Moderate or heavy snow showers
 -4° /-8° 6.7 mm 0 cm
18 Mar. Overcast
Overcast
 2° /-5° 0 mm 0 cm
19 Mar. Patchy rain possible
Patchy rain possible
 4° /-1° 0.6 mm 0.4 cm
20 Mar. Patchy rain possible
Patchy rain possible
 3° /1° 4.8 mm 2.2 cm
21 Mar. Light freezing rain
Light freezing rain
 1° /-3° 0.4 mm 0 cm
22 Mar. Patchy rain possible
Patchy rain possible
 3° /-1° 0.5 mm 0 cm
23 Mar. Light snow
Light snow
 -2° /-4° 0.7 mm 0 cm
24 Mar. Sunny
Sunny
 0° /-5° 0 mm 0 cm
25 Mar. Light freezing rain
Light freezing rain
 4° /-1° 0.3 mm 0.2 cm
26 Mar. Moderate rain
Moderate rain
 7° /1° 17.4 mm 0 cm
27 Mar. Partly cloudy
Partly cloudy
 6° /2° 0 mm 0 cm
28 Mar. Partly cloudy
Partly cloudy
 4° /1° 0 mm 0 cm
29 Mar. Blizzard
Blizzard
 8° /1° 7.6 mm 0 cm
30 Mar. Light snow showers
Light snow showers
 7° /-1° 8.6 mm 0 cm
31 Mar. Overcast
Overcast
 10° /0° 3.4 mm 0 cm
Next
Important Notice
Our weather forecast for St. Catharines 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 St. Catharines forecast closer to your planned date for the most up-to-date weather information.
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St. Catharines in March - FAQ

What are the expected maximum and minimum temperatures in St. Catharines during March?

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

How much rainfall should be expected in St. Catharines during March?

Significant rainfall exceeding 136.2 mm is expected in St. Catharines during March, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.

Will it snow in St. Catharines in March 2026?

St. Catharines experiences an average snowfall of 7.44 cm during March, occurring over 10 days.

What are the typical wind conditions in St. Catharines during March?

The average wind speed in St. Catharines during March is 32 km/h, suggesting breezy to windy conditions, depending on your activities.

St. Catharines snow forecast March 2026

Track daily snowfall levels and discover St. Catharines’s snowy potential this March ❄️
On average, St. Catharines sees 10 snowy days during March, with approximately 7.4 cm of total snowfall.

March rainfall patterns in St. Catharines

Explore the daily rainfall trends and prepare for St. Cathariness March weather 💧
Typically, St. Catharines has 15 rainy days in March with a total of 136.2 mm of rainfall.

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Location coordinates Where is St. Catharines?

Get accurate weather forecasts for St. Catharines, located at latitude 43.171 and longitude -79.243. Stay updated with localized weather information tailored for St. Catharines.

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