In March, Oshawa typically sees daytime highs of 3.1°C and overnight lows around -4.9°C. Compared to the annual average high of 11.9°C, March runs -8.8°C.
March in Oshawa averages a daytime high of 3.1°C and an overnight low of -4.9°C.
March runs -8.8°C compared to Oshawa's annual average high of 11.9°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 3.1°C and cooler evenings around -4.9°C.