Here in the South, black rubber - be it a car’s steering wheel or the handlebars of a bike - warms up very quickly in the hot sun. This is my solution to the resultant scorched hands: soft cotton blend gloves that extend up the fingers for full coverage protection, with lacily vented backs and ribbed palms, and short cuffs (since the goal is to stay cool, not warm :)
For M/L, go up a needle size.
This is pattern #11 in the Local Flavor collection. The designs in this collection were inspired by the town I live in and love. Photos are shot around town, and supplies, props, and additional garments are also local (to the best of my ability).