In June, Longmont typically sees daytime highs of 27.6°C and overnight lows around 9.9°C. Compared to the annual average high of 18.2°C, June runs +9.4°C.
June in Longmont averages a daytime high of 27.6°C and an overnight low of 9.9°C.
June runs +9.4°C compared to Longmont's annual average high of 18.2°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 27.6°C and cooler evenings around 9.9°C.