Monsoon season usually runs Early July to late August, but you can never predict how it will be. Even then, it is usually clear blue skies in the morning, clouds start building just before noon, and scattered thunderstorms in the afternoon. (We call this Colorado Forecast #1.). Often they will miss you, but if not they can be gully-washers. But usually it is scattered (except for 2017).
If projected, ride early!!!!!