INT.05 · City index / US
Chicago wash index
Lake-effect swings, real wind, and some of the saltiest winter roads in America. Spring and fall serve the clean windows; in winter, hit every above-freezing thaw to get the salt off before it eats the underbody.
WIND /// CONSTANT FACTORSALT /// BRUTAL WINTERSTHAWS /// USE EVERY ONE
01
The readout
Live · scored 0–100
02
Wash windows
Best 2-hour slots · daylight-aware
03
Next 48 hours
Hour · index · rain % · temp
Wash · 70+
Borderline · 45–69
Wait · under 45
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