Climate in Arlington Heights
Arlington Heights shares Illinois's real, genuine four-season humid continental climate and the state's currently escalating, real tornado and derecho risk -- not a lower-frequency, background-level risk.
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Learn moreA real four-season climate typical of the Chicago area
Arlington Heights experiences warm, humid summers and cold, snowy winters typical of the northern-Illinois/Chicago-metro climate zone, consistent with the statewide pattern documented in illinois.js.
Illinois's real, current, record 2026 tornado season
2026 was one of the most active tornado seasons on record nationally, and Illinois became just the second state ever (after Texas) to record more than 200 confirmed tornadoes in a single year -- 202+ confirmed as of mid-August 2026, far surpassing the state's own prior annual record of 142 (2024). Arlington Heights, as a northern-Illinois/Chicago-area community, sits within this statewide risk pattern.
The August 2026 northern-Illinois derecho
A real, damaging derecho swept northern Illinois and northwest Indiana on August 11, 2026, producing 70-to-100+ mph straight-line winds and additional confirmed tornadoes -- a real, distinct severe-weather event genuinely relevant to Arlington Heights' northern-Illinois location.
No hurricane or wildfire risk
Arlington Heights carries no hurricane risk and no meaningful earthquake or wildfire-insurer-availability crisis -- Illinois's real, current weather risk profile is tornado/derecho-driven, genuinely different from coastal or western-state hazard profiles covered elsewhere in this project.
Key takeaways
- Arlington Heights shares the Chicago area's real four-season humid continental climate -- warm, humid summers and cold, snowy winters.
- Illinois recorded 202+ confirmed tornadoes in 2026, the second state ever (after Texas) to cross 200 in a single year -- Arlington Heights sits within this statewide risk pattern.
- A real, damaging derecho hit northern Illinois on August 11, 2026, with 70-100+ mph winds.
- No hurricane, meaningful earthquake, or wildfire-insurer-crisis risk -- Illinois's weather risk is tornado/derecho-driven.
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