In June, Saint John typically sees daytime highs of 19.6°C and overnight lows around 8.8°C. Compared to the annual average high of 10.4°C, June runs +9.3°C.
June in Saint John averages a daytime high of 19.6°C and an overnight low of 8.8°C.
June runs +9.3°C compared to Saint John's annual average high of 10.4°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 19.6°C and cooler evenings around 8.8°C.