Seasons of Wildlife
Central California Valley Climate
The northern Central Valley has a hot Mediterranean climate; the more southerly parts in rainshadow zones are dry enough to be Mediterranean steppe (as around Fresno) or even low-latitude desert (as in areas around Bakersfield). Tule fog is a thick ground fog that settles along the length of the Great Central Valley. Tule fog forms during the late fall and winter (California's rainy season) after the first significant rainfall. The ordinary time frame for tule fog to form is from November 1 to March 31. This phenomenon is named after the tule grass wetlands (tulares) of the Central Valley.
Last Updated: Nov 21, 2013