Info on Early Season Stretches of 90 Degree Weather

Areas of Severe Thunderstorms and Heavy Rain Possible through the Weekend

There will be daily chances for scattered thunderstorms across portions of the Central and Eastern U.S. through the weekend, with severe thunderstorms possible in the northern Plains and Upper Midwest. Potential severe storm hazards may include large hail, damaging winds, and a few tornadoes. Storms could also produce heavy rain that may lead to isolated instances of flash flooding. Read More >

Public Information Statement National Weather Service Chicago IL 439 AM CDT Fri Jun 9 2017 /539 AM EDT Fri Jun 9 2017/ ...How Common Are Early Season Stretches of 90 Degree Weather?... Early season heat with afternoon temperatures in the 90s is forecast for at least a three to four day stretch from this weekend into early next week. Below is a look at how common such an early season stretch is for the area`s long term climate sites. ----------------------------------------------------------------- CHICAGO Since 1872, only nine years have had four or more consecutive days in the 90s prior to the midpoint of June (on or before June 15). The most recent was 18 years ago on June 8-11, 1999. The earliest on record was May 3-6, 1949, while the longest early season stretch was 9 days from May 16-24, 1977. Years with 4+ consecutive 90 degree days prior to June`s midpoint: 1920, 1921, 1934, 1949, 1956, 1962, 1977, 1988, and 1999. It should be noted that early season stretches of just 3 consecutive 90 degree days are much more common. The most recent was June 9-11, 2012. ----------------------------------------------------------------- ROCKFORD Since 1906, only six years have had four or more consecutive days in the 90s prior to the midpoint of June (on or before June 15). The most recent was over a half century ago, on June 6-9, 1963. The earliest on record was May 17-21, 1934, while the longest early season stretch was 8 days that same year, from May 29-June 5, 1934. Years with 4+ consecutive 90 degree days prior to June`s midpoint: 1921, 1933, 1934, 1943, 1956, and 1963 (1934 had two stretches). It should be noted that early season stretches of just 3 consecutive 90 degree days are much more common. The most recent was June 6-8, 2011. History of Chicago and Rockford Observing Sites $$ MTF