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 The highest monthly average temperature in San Marcos for August is 70 degrees. 2  The lowest monthly average temperature in San Marcos for January is 55 degrees. 3  The most monthly precipitation in San Marcos occurs in January with 2.3 inches.  The air quality index in San Marcos is 22% worse than the national average.