Thunder Bay weather in April
Temperature, rain and sunshine in April: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in April
Poor
Best time to visit: June – September
What is the weather like in Thunder Bay in April?
In April, Thunder Bay is cold: daytime highs average 4 °C, and nights often drop below freezing (−2 °C). The sun shines for around 7 hours a day. Precipitation, often as snow, falls on about 9 days, totalling 64 mm. Snow falls on about 4 days. All in all, April is not an ideal month for a holiday in Thunder Bay.
April compared
How the weather changes from March to May. Tap a month to open it.
More details for April
- Daylight
- 13 h 37 min07:09 – 20:46
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 21 km/haverage daily peakAll months
- Cloud cover
- 63 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 4 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/Toronto
How the score comes together
- Temperatureweight 50 %0 %
- Sunshineweight 20 %70 %
- Few rainy daysweight 30 %67 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in April
- Sunscreen
- Warm jacket
- Hat, scarf & gloves
- Rain jacket or umbrella
Thunder Bay in April: quick answers
Is Thunder Bay hot in April?
No. In April, Thunder Bay is cold: daytime highs average 4 °C and nights drop to about −2 °C.
Does it rain much in Thunder Bay in April?
Rain falls on about 9 days, adding up to 64 mm.
Thunder Bay month by month
The whole year in Thunder BayAll destinations: CanadaWhere to go in April
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences