The present conditions of the San Joaquin River at Friant Dam, the average discharge was , or 0.234 million acre-feet per year. The highest average discharge between 1941 and 2015 was in 1983 when the discharge was , with an average of those years of . The water temperature range from 7° Celsius (44.5 °F) in February 2006 to a high of 22.8 °C (73.3 °F) on Oct 4, 2014. This range is less extreme than the temperatures below Vernalis where the range is from 2° Celsius (35.6 °F)on Dec 26, 1987 to 35.5 °C (95.9 °F) on August 9, 1990. The river typically ends above the Mendota Pool. Larger flows in the fall may make it possible for the river to extend further towards the ocean, but for the last several years, this is a rare occurrence. The water is largely held behind Friant Dam.