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Weather in Thunder Bay for April 2026

Your guide to Thunder Bay weather in April - trends and predictions

    Snow Forecast ❄️

  • Expect heavy snowfall in Thunder Bay during April, with an average of 16 snowy days.
    According to Thunder Bay snow forecast for April 2026, 2 snowy days are expected until the end of the month. The closest date with snow is Wednesday, 29 April.

    • Temperatures

  • Until now, April 2026 in Thunder Bay has been nearly identical to the historical average, with a temperature of 3.5 °C (showing only a slight deviation of -0.5 °C).

  • The forecast for the coming days of April 2026 predicts a temperature of 6.8 °C , which is warmer than usual.

  • In general, the average temperature in Thunder Bay at the beginning of April is 0.9 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 5.6 °C by the end of April.

    • More

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Average dry days
8
Dry days
Average rainy days
6
Rainy days
Average snowy days
16
Snow days
Average temperatures
4°/-1°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
82 %
Avg humidity

Thunder Bay Weather April

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

Temperatures trend during April in Thunder Bay

See the weather trend as well as the moving average line

April weather in Thunder Bay day by day

Click on a date for more information
March May
Date Weather Temperatures Rain Snow More
1 Apr. Overcast
Overcast
 0° /-8° 0 mm 0 cm
2 Apr. Moderate or heavy snow showers
Moderate or heavy snow showers
 0° /-4° 37 mm 3.4 cm
3 Apr. Moderate snow
Moderate snow
 2° /-4° 11.3 mm 5.1 cm
4 Apr. Overcast
Overcast
 1° /-4° 7.4 mm 1.9 cm
5 Apr. Moderate or heavy snow showers
Moderate or heavy snow showers
 2° /-3° 6.8 mm 5 cm
6 Apr. Light freezing rain
Light freezing rain
 0° /-6° 0.1 mm 0 cm
7 Apr. Overcast
Overcast
 1° /-8° 0 mm 0 cm
8 Apr. Partly cloudy
Partly cloudy
 1° /-6° 7.8 mm 3.4 cm
9 Apr. Overcast
Overcast
 4° /-1° 0.7 mm 0.3 cm
10 Apr. Overcast
Overcast
 7° /-1° 0.5 mm 0 cm
11 Apr. Mist
Mist
 7° /-1° 0.1 mm 0 cm
12 Apr. Overcast
Overcast
 6° /0° 16.1 mm 0 cm
13 Apr. Moderate rain at times
Moderate rain at times
 6° /1° 2.7 mm 0 cm
14 Apr. Overcast
Overcast
 5° /1° 10.8 mm 2.3 cm
15 Apr. Patchy rain possible
Patchy rain possible
 7° /0° 3.1 mm 0 cm
16 Apr. Moderate or heavy snow showers
Moderate or heavy snow showers
 6° /-1° 3.9 mm 3.1 cm
17 Apr. Moderate or heavy snow showers
Moderate or heavy snow showers
 3° /-2° 17.2 mm 6.6 cm
18 Apr. Light freezing rain
Light freezing rain
 4° /-2° 8.2 mm 2.1 cm
19 Apr. Overcast
Overcast
 2° /-2° 0.2 mm 0 cm
20 Apr. Moderate or heavy snow showers
Moderate or heavy snow showers
 4° /-3° 6.2 mm 5 cm
21 Apr. Patchy moderate snow
Patchy moderate snow
 5° /-1° 12.3 mm 6.3 cm
22 Apr. Overcast
Overcast
 6° /0° 1.3 mm 0.3 cm
23 Apr. Overcast
Overcast
 5° /-2° 5.2 mm 1.1 cm
24 Apr. Overcast
Overcast
 4° /-2° 5.3 mm 0 cm
25 Apr. Mist
Mist
 8° /-1° 0 mm 0 cm
26 Apr. Overcast
Overcast
 7° /0° 1.9 mm 0 cm
27 Apr. Moderate or heavy rain shower
Moderate or heavy rain shower
 5° /0° 16.9 mm 2.4 cm
28 Apr. Patchy rain possible
Patchy rain possible
 6° /0° 15.2 mm 0 cm
29 Apr. Moderate rain
Moderate rain
 6° /0° 10.5 mm 7.6 cm
30 Apr. Patchy rain possible
Patchy rain possible
 3° /-1° 2.3 mm 1.7 cm
Next
Important Notice
Our weather forecast for Thunder Bay in April 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 Thunder Bay forecast closer to your planned date for the most up-to-date weather information.
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Thunder Bay in April - FAQ

What are the expected maximum and minimum temperatures in Thunder Bay during April?

Brace for cold days with temperatures not exceeding 4° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.

How much rainfall should be expected in Thunder Bay during April?

Significant rainfall exceeding 205.1 mm is expected in Thunder Bay during April, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Thunder Bay in April 2026?

Thunder Bay experiences an average snowfall of 60.4867 cm during April, occurring over 16 days.

What are the typical wind conditions in Thunder Bay during April?

The average wind speed in Thunder Bay during April is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

Thunder Bay snow forecast April 2026

Track daily snowfall levels and discover Thunder Bay’s snowy potential this April ❄️
On average, Thunder Bay sees 16 snowy days during April, with approximately 60.5 cm of total snowfall.

April rainfall patterns in Thunder Bay

Explore the daily rainfall trends and prepare for Thunder Bays April weather 💧
Typically, Thunder Bay has 6 rainy days in April with a total of 205.1 mm of rainfall.

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Get accurate weather forecasts for Thunder Bay, located at latitude 48.382 and longitude -89.25. Stay updated with localized weather information tailored for Thunder Bay.

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