In April, Rancho Cucamonga typically sees daytime highs of 20.6°C and overnight lows around 6.6°C. Compared to the annual average high of 23.1°C, April runs -2.5°C.
April in Rancho Cucamonga averages a daytime high of 20.6°C and an overnight low of 6.6°C.
April runs -2.5°C compared to Rancho Cucamonga's annual average high of 23.1°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 20.6°C and cooler evenings around 6.6°C.