September 2012 is the first month with a below normal average monthly temperature since September 2011! While the streak of 11 consecutive months with above normal average monthly temperatures (from October 2011 through August 2012) is remarkable, it is not the longest streak. The record number of consecutive months with above normal temperatures for Milwaukee and Madison is actually 20 (from December 1997 to July 1999).
The map below on the left shows the departure from the mean average monthly temperature and the map on the right shows the percent of mean monthly precipitation. Graphics are courtesy of the Midwest Regional Climate Center. Click each map for a larger version.
However, the year-to-date is still the record warmest at Milwaukee and Madison, by 0.9 and 1.5 degrees respectively.
The Climate Prediction Center (CPC) is forecasting an increased chance for below normal temperatures for October as well! There is also a lesser, but still increased chance of above normal precipitation for the majority of southeast and south central Wisconsin. The maps below depict the CPC's forecast. Click each map for a larger version.
The CPC is forecasting an increased chance for above normal temperatures and an equal chance for above, below, or near normal precipitation for the winter (December, January, and February). Click each map for a larger version.
NWS Milwaukee/Sullivan, WI