In June, Thunder Bay typically sees daytime highs of 20.8°C and overnight lows around 7.2°C. Compared to the annual average high of 8.0°C, June runs +12.8°C.
June in Thunder Bay averages a daytime high of 20.8°C and an overnight low of 7.2°C.
June runs +12.8°C compared to Thunder Bay's annual average high of 8.0°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 20.8°C and cooler evenings around 7.2°C.