In March, Boulder typically sees daytime highs of 6.6°C and overnight lows around -7.1°C. Compared to the annual average high of 13.6°C, March runs -7.0°C.
March in Boulder averages a daytime high of 6.6°C and an overnight low of -7.1°C.
March runs -7.0°C compared to Boulder's annual average high of 13.6°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 6.6°C and cooler evenings around -7.1°C.