In June, Boulder typically sees daytime highs of 23.0°C and overnight lows around 6.6°C. Compared to the annual average high of 13.6°C, June runs +9.3°C.
June in Boulder averages a daytime high of 23.0°C and an overnight low of 6.6°C.
June runs +9.3°C compared to Boulder's annual average high of 13.6°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 23.0°C and cooler evenings around 6.6°C.