Precipitation The average annual precipitation is . The wet season is generally October through April, though there may be a day or two of light rainfall in June or September. On average, precipitation falls on 60 days each year in Fair Oaks, and nearly all of this falls during the winter months. Average January rainfall is , and measurable precipitation is rare during the summer months. On rare occasions, monsoonal moisture surges from the Desert Southwest can bring upper-level moisture to the Sacramento region, leading to increased summer cloudiness, humidity, and even light showers and thunderstorms. Monsoon clouds do occur, usually during late July through early September. This climate is suited to the endangered Sacramento Orcutt Grass, which has a protected reserve at the Phoenix Vernal Pools.
Precipitation The average annual precipitation is  The wet season is generally October through April though there may be a day or two of light rainfall in June or September On average precipitation falls on 60 days each year in Fair Oaks and nearly all of this falls during the winter months Average January rainfall is  and measurable precipitation is rare during the summer months On rare occasions monsoonal moisture surges from the Desert Southwest can bring upper-level moisture to the Sacramento region leading to increased summer cloudiness humidity and even light showers and thunderstorms Monsoon clouds do occur usually during late July through early September This climate is suited to the endangered Sacramento Orcutt Grass which has a protected reserve at the Phoenix Vernal Pools