In June, Sarnia typically sees daytime highs of 24.7°C and overnight lows around 12.8°C. Compared to the annual average high of 13.3°C, June runs +11.3°C.
June in Sarnia averages a daytime high of 24.7°C and an overnight low of 12.8°C.
June runs +11.3°C compared to Sarnia's annual average high of 13.3°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 24.7°C and cooler evenings around 12.8°C.