In June, St. Catharines typically sees daytime highs of 23.5°C and overnight lows around 13.7°C. Compared to the annual average high of 12.9°C, June runs +10.7°C.
June in St. Catharines averages a daytime high of 23.5°C and an overnight low of 13.7°C.
June runs +10.7°C compared to St. Catharines's annual average high of 12.9°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 23.5°C and cooler evenings around 13.7°C.