We have been posting temperature updates over the last few weeks to gauge how incubating Steelhead may be fairing in the lower American River. Our most recent data show that water temperature is trending up. The graph below shows that the daily high temperature at our monitoring Roosmoor Bar and Sunrise sites is actually getting warmer than the William Pond thermometer (a cdec gauge). However, the lows at Rossmoor and Sunrise are lower than at William Pond. We think this is due to sunlight exposure of the river bottom and gravel.