In April, Karatsu typically sees daytime highs of 18.1°C and overnight lows around 10.5°C. Compared to the annual average high of 19.4°C, April runs -1.2°C.
April in Karatsu averages a daytime high of 18.1°C and an overnight low of 10.5°C.
April runs -1.2°C compared to Karatsu's annual average high of 19.4°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 18.1°C and cooler evenings around 10.5°C.