In August, Saint Joseph typically sees daytime highs of 30.4°C and overnight lows around 17.8°C. Compared to the annual average high of 17.6°C, August runs +12.8°C.
August in Saint Joseph averages a daytime high of 30.4°C and an overnight low of 17.8°C.
August runs +12.8°C compared to Saint Joseph's annual average high of 17.6°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 30.4°C and cooler evenings around 17.8°C.