All those wet days in March brought the annual precipitation up to 76 percent of the yearly average in the Grass Valley area - something that sounded far-fetched heading into the month after a dry winter, particularly in December. Measurements at the Grass Valley Water Treatment Plant registered more than 17 inches of precipitation in March - mostly rain - which is more than double the average amount for that month, said National Oceanic Atmospheric Administration Rorecaster George Cline. "You guys are better than most," Cline said. "You had a terrible December, but March was great."Year to date precipitation averages …