It's not just Chicago; the Illinois State Climatologist has pronounced this year hotter than hell:
This year so far is the warmest and third driest on record. The statewide average temperature for January-July 2012 was 56.9 degrees, 5.5 degrees above normal. The statewide average precipitation for January-July was 357 mm, 249 mm below normal or 59 percent of normal.
Statewide Average Temperature Rankings for January-July
- 2012: 13.8°C
- 1921: 13.4°C
- 1987: 12.3°C
- 1998: 12.2°C
- 2006: 12.1°C
Statewide Average Precipitation Rankings for January-July
- 1936: 310 mm
- 1934: 344 mm
- 2012: 357 mm
- 1988: 371 mm
- 1914: 386 mm
That said, I'm sitting outside with my laptop on a lovely, clear 26°C night. The really awful heat returns tomorrow, though...