In September, Liege typically sees daytime highs of 18.6°C and overnight lows around 9.5°C. Compared to the annual average high of 13.0°C, September runs +5.6°C.
September in Liege averages a daytime high of 18.6°C and an overnight low of 9.5°C.
September runs +5.6°C compared to Liege's annual average high of 13.0°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 18.6°C and cooler evenings around 9.5°C.