In September, Grenoble typically sees daytime highs of 19.2°C and overnight lows around 9.2°C. Compared to the annual average high of 13.0°C, September runs +6.1°C.
September in Grenoble averages a daytime high of 19.2°C and an overnight low of 9.2°C.
September runs +6.1°C compared to Grenoble's annual average high of 13.0°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 19.2°C and cooler evenings around 9.2°C.