In July, Thornton typically sees daytime highs of 31.6°C and overnight lows around 14.2°C. Compared to the annual average high of 18.6°C, July runs +13.1°C.
July in Thornton averages a daytime high of 31.6°C and an overnight low of 14.2°C.
July runs +13.1°C compared to Thornton's annual average high of 18.6°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 31.6°C and cooler evenings around 14.2°C.