Weather for River Botton Reservoir, CA - River Botton Reservoir, CA Weather, Current Weather in River Botton Reservoir, CA. Local weather report for River Botton Reservoir, CA, Local River Botton Reservoir, CA weather. Forecast for River Botton Reservoir, California, River Botton Reservoir, CA weather forecast. Find your local River Botton Reservoir weather forecast. River Botton Reservoir, CA weather conditions.