The weather in Thunder Bay in April is very cold with temperatures between -2°C and 4°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Thunder Bay during the month of April. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Thunder Bay is going to experience quite a number of days of snow during April. It’s the perfect time to build snowmen, drink hot cocoa, and have a snowball fight. Just remember to wear a warm scarf and a pair of mittens!
Our weather forecast can give you a great sense of what weather to expect in Thunder Bay in April 2025.
If you’re planning to visit Thunder Bay in the near future, we highly recommend that you review the 14 day weather forecast for Thunder Bay before you arrive.
