In April, Longmont typically sees daytime highs of 16.7°C and overnight lows around 0.3°C. Compared to the annual average high of 18.2°C, April runs -1.5°C.
April in Longmont averages a daytime high of 16.7°C and an overnight low of 0.3°C.
April runs -1.5°C compared to Longmont's annual average high of 18.2°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 16.7°C and cooler evenings around 0.3°C.