In August, Hillsboro typically sees daytime highs of 26.3°C and overnight lows around 11.5°C. Compared to the annual average high of 16.4°C, August runs +9.9°C.
August in Hillsboro averages a daytime high of 26.3°C and an overnight low of 11.5°C.
August runs +9.9°C compared to Hillsboro's annual average high of 16.4°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 26.3°C and cooler evenings around 11.5°C.