In April, St. Catharines typically sees daytime highs of 11.3°C and overnight lows around 2.0°C. Compared to the annual average high of 12.9°C, April runs -1.6°C.
April in St. Catharines averages a daytime high of 11.3°C and an overnight low of 2.0°C.
April runs -1.6°C compared to St. Catharines's annual average high of 12.9°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 11.3°C and cooler evenings around 2.0°C.