In July, Boulder typically sees daytime highs of 26.0°C and overnight lows around 9.7°C. Compared to the annual average high of 13.6°C, July runs +12.4°C.
July in Boulder averages a daytime high of 26.0°C and an overnight low of 9.7°C.
July runs +12.4°C compared to Boulder's annual average high of 13.6°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 26.0°C and cooler evenings around 9.7°C.