Normal sunshine and temperature, August

The location of cities on this chart are an indication of their proximity to other locations with similar temperature and solar radiation. These are two factors that are almost completely out of the control of the turfgrass manager. Therefore, the temperature and the sunshine hours (or solar radiation) can serve as an indication for which types of grasses will thrive or struggle at that location during a particular month.

Combine the months into a year, and you have a picture…