In April, Flagstaff typically sees daytime highs of 15.2°C and overnight lows around -2.0°C. Compared to the annual average high of 16.9°C, April runs -1.7°C.
April in Flagstaff averages a daytime high of 15.2°C and an overnight low of -2.0°C.
April runs -1.7°C compared to Flagstaff's annual average high of 16.9°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 15.2°C and cooler evenings around -2.0°C.