Average Temperatures start to dropSeptember 2nd, 2014 at 9:07 pm by Bill Steffen under Bill's Blog, Weather
Click on the graph (from NWS-NOAA) to enlarge. The graph shows average temperature in Southern Michigan. The average high temperature for G.R. has already dropped 5° – from 83° in mid-July to 78° on Sept. 1-3. The fall starts downward at a faster rate from here on. The average high temperature in G.R. is down to 73° by Sept. 16 and reaches 67° by the end of the month. by Oct. 15th, we’re down to 61° and on Halloween, it’s 55°. We reach 40° by the end of November. As of today (9/2) we have lost 2 hours and 14 minutes of daylight and we’ll lose another 81 minutes of daylight by the end of the month. Average temperatures lag the position of the sun by about one month. So, even though we’ve already lost a lot of daylight, average temperatures haven’t fallen very much. I will be tracking the amount of snow cover that accumulates over N. Canada and Asia. If snow cover is more extensive than average (which was the case last fall), that is often a sign of a colder and/or snowier winter in the Great Lakes. If you’ve got a bucket list of things you wanted to do over the summer, the clock is ticking. We’ve still got some warm, summer days ahead, but fall is going to be knocking on the door before too long.