In March, Thunder Bay typically sees daytime highs of -0.2°C and overnight lows around -12.8°C. Compared to the annual average high of 8.0°C, March runs -8.1°C.
March in Thunder Bay averages a daytime high of -0.2°C and an overnight low of -12.8°C.
March runs -8.1°C compared to Thunder Bay's annual average high of 8.0°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near -0.2°C and cooler evenings around -12.8°C.