In March, Longmont typically sees daytime highs of 11.3°C and overnight lows around -4.5°C. Compared to the annual average high of 18.2°C, March runs -6.9°C.
March in Longmont averages a daytime high of 11.3°C and an overnight low of -4.5°C.
March runs -6.9°C compared to Longmont's annual average high of 18.2°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 11.3°C and cooler evenings around -4.5°C.