In October, Oshawa typically sees daytime highs of 14.3°C and overnight lows around 5.1°C. Compared to the annual average high of 11.9°C, October runs +2.4°C.
October in Oshawa averages a daytime high of 14.3°C and an overnight low of 5.1°C.
October runs +2.4°C compared to Oshawa's annual average high of 11.9°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 14.3°C and cooler evenings around 5.1°C.