Source: The Castaic, CA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.
Plant fescues when fall temperature reach about 75 F. The next best time to plant fescue seeds is when rising temperatures in spring reach 60 F. Summer isn't a good time to plant fescue lawns, because fescue grass tends to go dormant during periods of high temperature.
Hard fescue grass varieties have a bunch type growth habit similar to Tall Fescue Grass, but again with narrow upright leaves. Hard fescue grass is indeed one of the hardiest of the fescues. Shade and drought resistant, and more disease resistant this fescue grows best in northern climates areas of higher elevations.