In October, Idaho Falls typically sees daytime highs of 16.5°C and overnight lows around -0.5°C. Compared to the annual average high of 14.5°C, October runs +2.0°C.
October in Idaho Falls averages a daytime high of 16.5°C and an overnight low of -0.5°C.
October runs +2.0°C compared to Idaho Falls's annual average high of 14.5°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 16.5°C and cooler evenings around -0.5°C.