The developing
"Godzilla" El Niño will make Chicago significantly warmer than average during the upcoming 2026–2027 winter. [
1,
2]
The Atmospheric Shift
A strong El Niño alters the global atmospheric flow by pushing the
polar jet stream far north into Canada. This effectively builds a wall that keeps freezing Arctic blasts locked up north, preventing them from diving down into the Midwest. At the same time, mild Pacific air floods across the northern United States, enveloping the Great Lakes region in a much milder air mass. [
1,
2,
3,
4,
5]
Historical Data for Strong Events
Meteorologists from
CBS Chicago and
NBC Chicago highlight what happens locally when an El Niño reaches this "super" magnitude: [
1]
- Temperature Spikes: During the last three "very strong" El Niño winters, temperatures in Chicago ran an enormous 4 degrees warmer than average across December, January, and February. [1]
- Slashing Snowfall: These mild temperatures usually mean far less snow. Past strong events have cut Chicago’s seasonal snowfall down to less than half of its typical 29 inches. []
- Lower Utility Bills: A milder season typically results in fewer heating degree days, meaning residents can generally expect lower heating bills. [1]