In June, Ottawa typically sees daytime highs of 23.9°C and overnight lows around 11.3°C. Compared to the annual average high of 11.1°C, June runs +12.8°C.
June in Ottawa averages a daytime high of 23.9°C and an overnight low of 11.3°C.
June runs +12.8°C compared to Ottawa's annual average high of 11.1°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 23.9°C and cooler evenings around 11.3°C.