In April, Waterloo typically sees daytime highs of 11.5°C and overnight lows around 0.4°C. Compared to the annual average high of 11.9°C, April runs -0.4°C.
April in Waterloo averages a daytime high of 11.5°C and an overnight low of 0.4°C.
April runs -0.4°C compared to Waterloo's annual average high of 11.9°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 11.5°C and cooler evenings around 0.4°C.