In August, Longmont typically sees daytime highs of 29.7°C and overnight lows around 12.3°C. Compared to the annual average high of 18.2°C, August runs +11.6°C.
August in Longmont averages a daytime high of 29.7°C and an overnight low of 12.3°C.
August runs +11.6°C compared to Longmont's annual average high of 18.2°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 29.7°C and cooler evenings around 12.3°C.