Medical Definition of HYPHA. : one of the threads that make up the mycelium of a fungus, increase by apical growth, and are coenocytic or transversely septate.efinition of HYPHA. : one of the threads that make up the mycelium of a fungus, increase by apical growth, and are transversely septate or nonseptate. â hyÂ·phal \-fÉl\ adjective. See hypha defined for kids. ADVERTISEMENT.
San Marcos, CA Weather. San Marcos, CA climate is warm during summer when temperatures tend to be in the 70's and cool during winter when temperatures tend to be in the 50's.
1 According to the Holdridge life zones system of bioclimatic classification San Diego, California is situated in or near the warm temperate thorn steppe biome.  The annual average temperature is 17.9 degrees Celsius (64.2 degrees Fahrenheit). See the temperatures page for a monthly breakdown and the fixed scale graph.