In August, Calais typically sees daytime highs of 19.7°C and overnight lows around 13.6°C. Compared to the annual average high of 12.7°C, August runs +7.0°C.
August in Calais averages a daytime high of 19.7°C and an overnight low of 13.6°C.
August runs +7.0°C compared to Calais's annual average high of 12.7°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 19.7°C and cooler evenings around 13.6°C.