In March, Hillsboro typically sees daytime highs of 11.9°C and overnight lows around 2.2°C. Compared to the annual average high of 16.4°C, March runs -4.5°C.
March in Hillsboro averages a daytime high of 11.9°C and an overnight low of 2.2°C.
March runs -4.5°C compared to Hillsboro's annual average high of 16.4°C, ranking #8 of 12 months by warmth.
Plan for daytime highs near 11.9°C and cooler evenings around 2.2°C.