In September, Fishers typically sees daytime highs of 25.5°C and overnight lows around 12.3°C. Compared to the annual average high of 16.5°C, September runs +9.0°C.
September in Fishers averages a daytime high of 25.5°C and an overnight low of 12.3°C.
September runs +9.0°C compared to Fishers's annual average high of 16.5°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 25.5°C and cooler evenings around 12.3°C.