In April, Casper typically sees daytime highs of 13.5°C and overnight lows around -1.4°C. Compared to the annual average high of 15.2°C, April runs -1.7°C.
April in Casper averages a daytime high of 13.5°C and an overnight low of -1.4°C.
April runs -1.7°C compared to Casper's annual average high of 15.2°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 13.5°C and cooler evenings around -1.4°C.