California Rainfall Totals Year To Date Map - Monthly precipitation summary monthly precipitation summary only (by hydrologic area. ) Seasonal rainfall charts for the main site historical cumulative and daily rainfall totals back to the 1997/1998 season when the automated rain gauge was installed. Summary of daily rainfall totals for the current season and percent of normal. Includes previous years for comparison. California’s annual precipitation can vary greatly from year to year and region to region. The map of california shows how this water year’s precipitation compares to what has been observed. This map shows where precipitation for the water year to date is below 70 percent of average and temperatures are in the 80th percentile or above (warmer than 80 percent of the recorded.
Monthly precipitation summary monthly precipitation summary only (by hydrologic area. ) Seasonal rainfall charts for the main site historical cumulative and daily rainfall totals back to the 1997/1998 season when the automated rain gauge was installed.