Thunder Bay
April
Weather in Thunder Bay for April 2025
Your guide to Thunder Bay weather in April - trends and predictions
In general, the average temperature in Thunder Bay at the beginning of April is 1 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 3.9 °C by the end of April.
With an average of 2 rainy days, Thunder Bay experiences minimal rainfall in April, ensuring that most days remain pleasantly dry.
Thunder Bay experiences moderate snowfall in April, with an average of 7 snowy days.
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21
Dry days
2
Rainy days
7
Snow days
5°/-3°
Temperatures
21 km/h
Avg max wind
85 %
Avg humidity
Thunder Bay in April average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  0° | 2  1° | 3 1° | 4  -0° | 5  2° | 6 1° | |
| 7 2° | 8  2° | 9 5° | 10 9° | 11 8° | 12 8° | 13  7° |
| 14 6° | 15  9° | 16 3° | 17 3° | 18 5° | 19 2° | 20 4° |
| 21  3° | 22 5° | 23 4° | 24 1° | 25 5° | 26 5° | 27 6° |
| 28 4° | 29 2° | 30 4° |
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Temperatures trend during April in Thunder Bay
See the weather trend as well as the moving average line
April weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Apr. | Cloudy | 0° /-8° | 0 mm | 0 cm | |
| 2 Apr. | Light freezing rain | 1° /-5° | 1.8 mm | 1.2 cm | |
| 3 Apr. | Light freezing rain | 1° /-5° | 2.6 mm | 0.6 cm | |
| 4 Apr. | Overcast | 0° /-5° | 3.3 mm | 2.5 cm | |
| 5 Apr. | Moderate or heavy snow showers | 2° /-4° | 13.6 mm | 10 cm | |
| 6 Apr. | Light freezing rain | 1° /-5° | 0.2 mm | 0 cm | |
| 7 Apr. | Overcast | 2° /-6° | 0 mm | 0 cm | |
| 8 Apr. | Partly cloudy | 2° /-4° | 3.4 mm | 0 cm | |
| 9 Apr. | Overcast | 5° /0° | 0.5 mm | 0 cm | |
| 10 Apr. | Overcast | 9° /1° | 1 mm | 0 cm | |
| 11 Apr. | Overcast | 8° /2° | 0.2 mm | 0 cm | |
| 12 Apr. | Overcast | 8° /1° | 0.1 mm | 0 cm | |
| 13 Apr. | Moderate rain at times | 7° /2° | 0.6 mm | 0 cm | |
| 14 Apr. | Overcast | 6° /1° | 0.1 mm | 0 cm | |
| 15 Apr. | Patchy rain possible | 9° /2° | 6.2 mm | 0 cm | |
| 16 Apr. | Moderate or heavy snow showers | 3° /-1° | 7.8 mm | 6.3 cm | |
| 17 Apr. | Moderate or heavy snow showers | 3° /-3° | 23.2 mm | 13.2 cm | |
| 18 Apr. | Light freezing rain | 5° /-2° | 3 mm | 0 cm | |
| 19 Apr. | Overcast | 2° /-2° | 0.3 mm | 0 cm | |
| 20 Apr. | Moderate or heavy snow showers | 4° /-1° | 12.1 mm | 9.8 cm | |
| 21 Apr. | Patchy moderate snow | 3° /0° | 7.1 mm | 2.5 cm | |
| 22 Apr. | Light freezing rain | 5° /-1° | 2.6 mm | 0.6 cm | |
| 23 Apr. | Overcast | 4° /-4° | 3.7 mm | 1.7 cm | |
| 24 Apr. | Overcast | 1° /-6° | 0 mm | 0 cm | |
| 25 Apr. | Overcast | 5° /-2° | 0 mm | 0 cm | |
| 26 Apr. | Overcast | 5° /-1° | 2.1 mm | 0 cm | |
| 27 Apr. | Moderate or heavy snow showers | 6° /0° | 17.4 mm | 7.1 cm | |
| 28 Apr. | Patchy rain possible | 4° /-1° | 6.3 mm | 0 cm | |
| 29 Apr. | Moderate or heavy snow showers | 2° /0° | 23.1 mm | 10.3 cm | |
| 30 Apr. | Moderate or heavy snow showers | 4° /0° | 7.9 mm | 1.7 cm | |
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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.
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 5° 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 283.3 mm is expected in Thunder Bay during April, occurring over more than 2 days. Preparing for wet conditions is recommended in your planning.
Is snowfall common in Thunder Bay during April?
Thunder Bay experiences an average snowfall of 127.6 cm during April, occurring over 7 days, which may interest winter sports enthusiasts.
What are the typical wind conditions in Thunder Bay during April?
The average wind speed in Thunder Bay during April is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
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