In August, Idaho Falls typically sees daytime highs of 29.2°C and overnight lows around 9.4°C. Compared to the annual average high of 14.5°C, August runs +14.8°C.
August in Idaho Falls averages a daytime high of 29.2°C and an overnight low of 9.4°C.
August runs +14.8°C compared to Idaho Falls's annual average high of 14.5°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 29.2°C and cooler evenings around 9.4°C.