From USC Dornsrife:
Presidential Election Vote
This chart tracks our best estimate, over time, of how America plans to vote in November The final blue and red figures on the right side of the chart represent our most recent estimates of Hillary Clinton's vote (blue squares) and Donald Trump's (red diamonds).
These estimates represent weighted averages of all responses in the prior week. The gray band is a "95-percent confidence interval". Figures lying outside the gray band mean that we are at least 95% confident that the candidate with the highest percentage will win the popular vote.