![]() ![]() The California Department of Water Resources averages data from 19 weather stations spanning the state and generates averages for three regions. Rainfall in California from a monthly perspectiveĭecember and January rainfall totals have been above average in several parts of the state. According to data from the state's Department of Water Resources, the Bay Area received roughly 82 of its annual average rainfall during the 2021-2022 water year, measured from Oct. Napa was nearly 5 inches higher at 15.19 inches, and Sonoma's 15.8 inches beat its previous high of 12.56 inches. Downtown Oakland received 18.33 inches, topping the previous high by 8 inches. Lorber's calculations put all three locations well above their former records. 16 in areas around Oakland, Napa and Sonoma. Last year, at this time, the location had measured 16.84 inches. Records were toppled for the 22-day period from Dec. 16, the site has picked up 21.75 inches since Oct. That doesn't mean records weren't broken around the state, Lorber said. Santa Clara Valley Water District ALERT Precipitation Gage Information. San Francisco's total rainfall of 17.64 inches was second to that rainy season more than 160 years ago, when the same time period saw 18.49 inches. "Downtown San Francisco is our only site that has records that far back." 16) due to even more exceptional rainfall in the Great Flood from December 1861 to January 1862," National Weather Service meteorologist Jeff Lorber said. ![]() Users should note that different lengths of record are. "Downtown San Francisco did not see record rainfall in this period (Dec. Normal rainfall is determined using the full period of record from a site until the end of the 2015 year. The data, from Oregon State University’s PRISM product, is based on the network of real-time precipitation sensors spread throughout California.įor some cities. ![]()
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