In April, Keflavik typically sees daytime highs of 5.4°C and overnight lows around 0.7°C. Compared to the annual average high of 6.8°C, April runs -1.5°C.
April in Keflavik averages a daytime high of 5.4°C and an overnight low of 0.7°C.
April runs -1.5°C compared to Keflavik's annual average high of 6.8°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 5.4°C and cooler evenings around 0.7°C.