Chicago Hail Season 2026: Which Illinois Counties Get Hit Most and What to Do After a Storm
Chicago hail season runs May through September, peaking in June and July. The six-county metro — Cook, DuPage, Lake, Will, Kane, and McHenry — sits in the northeastern extension of the central plains storm corridor and sees active hail events throughout the season. If your roof was hit, document before calling a contractor.
The same systems that generate severe weather across Iowa and Wisconsin regularly move northeast through Chicagoland. When they do, they drop hail on neighborhoods in Naperville, Orland Park, Wilmette, and Schaumburg the same way they drop it on New Berlin and Brookfield. What follows — the storm chasers, the insurance claim, the questions about which contractor to trust — is also the same.
This guide covers every stage: what to document, how Illinois insurance works, what contractor licensing actually looks like in Illinois (it is more complicated than most homeowners assume), and how to tell a legitimate roofer from someone who followed the storm north from Texas.
When Is Hail Season in Chicago?
Hail season in Chicago runs from May through September, with June and July the most active months. Convective storms build over the heated land mass through late spring and summer, generating the atmospheric instability that lifts hailstones to altitude before they fall. By October, the storm pattern shifts and the season effectively closes.
The calendar matters for two practical reasons. First, if your roof was damaged and you are getting contractor calls right now, you are in the middle of peak season — and so are every storm chaser and out-of-state crew in the country. Second, if your roof is aging and you are wondering whether to replace it before or after storm season, the window to act is narrowing.
The NOAA Storm Events Database at ncdc.noaa.gov/stormevents is the publicly available federal record maintained by the National Centers for Environmental Information. Search by state (Illinois), your county, and the storm date to get the NWS-confirmed hail size, storm track, and affected area. Insurance adjusters use this same database — having it before your adjuster visit puts you on equal footing.
Which Chicago-Area Counties See the Most Hail Damage?
The six-county Chicago metro sits directly in the corridor that funnels severe weather northeast from the central plains. The flat agricultural terrain south and west of Chicago provides no topographic resistance — storm systems that form over Iowa and cross into Illinois arrive at the Chicago suburbs with their intensity largely intact.
| County | Risk Level | Key Context |
|---|---|---|
| DuPage County | HIGH | Open terrain; direct supercell exposure from the southwest |
| Will County | HIGH | Flat prairie with no terrain break; northeast storm track moves through this corridor consistently |
| Kane County | HIGH | Northern extension of the Will County corridor; western suburbs in direct path |
| Cook County | HIGH | Density means large event numbers; city, north shore, and south suburbs all active |
| McHenry County | MODERATE–HIGH | Northern collar county; catches trailing edge of many systems |
| Lake County | MODERATE–HIGH | Lake Michigan moderates some events; inland areas more active than shoreline |
| Verify your specific storm event at ncdc.noaa.gov/stormevents — search by county and date for NWS-confirmed hail size and track. | ||
If your home is in Naperville, Bolingbrook, Romeoville, or Aurora — the DuPage and Will County suburbs — you are in the most consistently active zone. Orland Park, Tinley Park, and the southwest Cook County suburbs are similarly exposed. Lake County communities like Libertyville and Vernon Hills see meaningful activity but with some moderation from proximity to Lake Michigan.
The storm track through DuPage and Will counties is one of the most consistent hail corridors in the Midwest. After a major event, I have seen neighborhoods in Naperville and Bolingbrook where every house on the block has impact marks on the south and west faces — same exposure angle, same hail size, same soft metal dents in the gutters. That consistency is actually useful for homeowners: if your neighbor two doors down has a valid hail claim, the storm record for your address is almost certainly the same event.
— Ioannis Karampetsos, Founder & Remodeling Contractor, FindMeARooferWhat Hail Damage Looks Like on a Chicago-Area Roof
Hail damage to an asphalt shingle roof is rarely visible from the ground. The evidence is on the roof — and on the soft metal around it. Before anyone gets up there, here is what to look for at eye level.
Start with the soft metal
Aluminum gutters, downspouts, window screen frames, and the fins on your air conditioning condenser unit are your first evidence. Hail large enough to damage your shingles will leave visible dents in these materials. Photograph all of it immediately — before any repairs, before any cleaning. These ground-level photos are among the strongest evidence in an insurance claim because they are accessible, undeniable, and impossible to confuse with pre-existing wear.
What the adjuster is looking for on the roof
On asphalt shingles, a hail impact creates a roughly circular area of granule displacement — the mineral granules are knocked free, exposing the underlying fiberglass mat. Fresh impacts have a bruised, darker appearance at the center. A Haag Certified Inspector — trained specifically in documenting hail and wind damage to insurance-standard specifications — can distinguish functional damage (compromised protection that accelerates shingle deterioration) from cosmetic marks and normal aging. This distinction matters enormously on Illinois policies that include cosmetic damage exclusions.
Many Illinois homeowner policies issued or renewed in recent years include a cosmetic damage exclusion that limits coverage for hail below a specified functional damage threshold. If your policy has this exclusion, a Haag Certified Inspector's report documenting functional damage — not just cosmetic marks — is essential to a successful claim. Ask your contractor whether they work with Haag-certified inspectors before the adjuster visit.
The 24-Hour Checklist After a Hail Storm
Do not call a contractor before you document. Do not let anyone on your roof before you document. The evidence you create in the first 24 hours is the foundation of your insurance claim — once a crew has been on the roof and made repairs, the pre-loss condition is harder to establish.
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Photograph all soft metal at ground level Gutters, downspouts, window screens, AC condenser fins. Use your phone's camera with location services on — the metadata automatically embeds GPS coordinates and timestamp, which insurance adjusters can reference. Dents in aluminum at ground level are direct evidence of hail size and impact.
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Pull the NOAA storm record for your county Go to ncdc.noaa.gov/stormevents, select Illinois, your county, and the storm date. Download the event record. It shows the NWS-confirmed hail size, storm track, and affected area for your specific location. This is the same federal database your adjuster will reference — have it before they arrive.
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Call your insurer to open the claim — not a contractor Report the damage and schedule an adjuster inspection. Keep the call simple: "I'd like to report storm damage to my property from [date] and schedule an adjuster inspection." You are opening a claim, not accepting a settlement or authorizing repairs. Do not estimate costs, do not describe damage you haven't verified, do not agree to any scope discussion.
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Get an independent inspection before the adjuster arrives A licensed Illinois roofing contractor should inspect your roof independently before your insurance adjuster's visit. This establishes your documented damage record. If the adjuster's scope comes in lower than what your contractor found, you have the foundation to dispute it. This inspection costs you nothing — any contractor who handles insurance work will do it at no charge.
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Do not sign anything at the door If a contractor approaches you unsolicited within 48 hours of a storm, do not sign a contract, an "inspection authorization," or any document that claims exclusive rights to your insurance proceeds. Under the Illinois Home Repair and Remodeling Act (815 ILCS 513), you have a right-to-cancel period on home repair contracts — but the safest position is not to sign under pressure in the first place.
How Illinois Homeowner Insurance Claims Work After Hail Damage
ACV vs. RCV — the two payment structures
Your Illinois homeowner policy pays either Actual Cash Value (ACV) or Replacement Cost Value (RCV). ACV pays replacement cost minus depreciation based on your roof's age and condition. On a 20-year-old roof, this can be significantly less than what a full replacement actually costs. RCV pays the full cost to replace the roof with materials of like kind and quality, typically in two payments: an initial ACV check when the claim is approved, and a holdback released after the work is complete and the final invoice is submitted. Look for "Roof Payment Schedule" or "Cosmetic Damage Exclusion" in your policy to understand which applies to you.
Illinois Department of Insurance
The Illinois Department of Insurance (IDI) regulates all carriers doing business in Illinois and is your resource if a claim is handled in bad faith. The IDI's website at insurance.illinois.gov provides the complaint portal, claim guidance, and carrier contact information. The Illinois Insurance Code (215 ILCS 5) governs carrier obligations — including response timelines and claims handling requirements. If your claim involves an unreasonable delay, an inadequate investigation, or an unjustified denial, file a complaint at insurance.illinois.gov.
The appraisal clause
Most Illinois standard homeowner policies include an appraisal clause as a dispute resolution mechanism. If you and your insurer cannot agree on the amount of loss, each party appoints a competent appraiser; the two appraisers select an umpire; the umpire's decision is binding. This process bypasses litigation and is typically faster and less expensive — particularly when the dispute is about the dollar amount rather than coverage itself.
Any contractor who offers to "cover your deductible," "work with your insurance to eliminate your out-of-pocket cost," or otherwise suggests your deductible will disappear — is describing an insurance fraud scheme. It works by inflating the claim to offset the deductible, exposing both the contractor and the homeowner to liability under Illinois insurance law. Close the door on this offer. It is one of the clearest indicators of the quality of work you would receive.
Finding a Licensed Roofing Contractor in Illinois
This is where Illinois differs from states like Wisconsin — and where homeowners in the Chicago suburbs are most at risk of making an uninformed decision. Illinois does not have a single statewide residential roofing contractor license. The system is more fragmented, which makes it harder to verify a contractor in a single lookup.
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City of Chicago: BACP Roofing Contractor License required Any contractor performing roofing work within Chicago city limits must hold a current Roofing Contractor License from the Department of Business Affairs and Consumer Protection (BACP). Ask for the license number and verify it at chicago.gov — searching under BACP license lookup. A contractor working in Chicago without this license is not legally permitted to be on your roof.
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Collar counties: municipal requirements, enforced through permits In DuPage, Lake, Will, Kane, and McHenry counties, contractor licensing requirements are set at the municipal level. The practical verification is the building permit: a contractor who pulls permits correctly through your local building department has passed that municipality's contractor requirements. If a contractor cannot tell you which permits they will pull and in which jurisdiction — before they start work — that is a gap worth pressing on.
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Illinois Home Repair and Remodeling Act (815 ILCS 513) Illinois state law requires contractors on home repair and remodeling projects over $1,000 to provide a written contract with specific disclosures — including start and estimated completion dates, a description of the work, and a right-to-cancel period. A contractor who refuses to provide a written contract before starting work is not in compliance with Illinois law. This is a minimum standard, not a vetting green light — but a contractor who won't provide a written contract should not be on your roof.
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The universal standard: require a building permit Every full roof replacement in an Illinois municipality requires a building permit. Your contractor pulls it before work begins — not after. The permit triggers a final inspection by a municipal building official, which independently verifies code compliance. A contractor who discourages permitting, offers to "take care of it" with no documentation, or says permits are not required in your area is not operating legally.
Because Illinois's licensing system is fragmented by municipality, FindMeARoofer's vetting process for Illinois contractors covers local license verification (City of Chicago BACP where applicable), permit compliance history, and insurance status. Every contractor in our Illinois network has been verified against these standards before they receive a referral.
The Storm Chaser Warning for Chicago Homeowners
After a significant hail event in the Chicago metro, the same pattern plays out that hits every major hail market in the country. Within 24 to 48 hours, crews arrive from out of state — plates from Texas, Oklahoma, Tennessee, and Florida are common after a large Midwest event. They work door-to-door in the affected neighborhoods, offering to "work with your insurance," promising the job will cost you nothing out of pocket.
Most will be gone from the area within four to six weeks. The work they leave behind is frequently not permitted, not flashed at chimneys and pipe boots, and backed by a warranty from a company that no longer has an address in Illinois. Two Chicago winters later — freeze-thaw cycles, ice dams at the eaves, heat differential between conditioned space and a poorly ventilated attic — the homeowner has a leak and no one to call.
The three questions that separate a real contractor from a storm chaser
For City of Chicago work: ask for their BACP Roofing Contractor License number. For suburbs: ask which permits they have pulled locally and whether they have references from recent work in your specific town. A contractor who regularly works in Naperville or Schaumburg can answer this without hesitation. One who just drove in from Oklahoma cannot.
Not "we'll handle the permit" — ask specifically: will you pull the permit before any material touches my roof? A contractor who discourages the permit, delays it, or says your municipality doesn't require one is telling you they don't intend to pass a code inspection. That answer alone ends the conversation.
After tear-off, deck boards sometimes need replacement — particularly on DuPage and Will County homes from the 1960s and 1970s where original OSB or board decking may be approaching its service life. An experienced contractor explains exactly how they document it, how they communicate with your insurer if a claim is open, and what the per-board cost looks like in writing. If they can't answer this specifically, they haven't done enough insurance work in this market to handle your claim.
Illinois Hail Season FAQ
Chicago hail season runs May through September, peaking in June and July. The six-county Chicago metro — Cook, DuPage, Lake, Will, Kane, and McHenry — sits in the northeastern extension of the central plains storm corridor. The flat terrain south and west of Chicago provides no natural barrier to storm systems moving northeast from Iowa and northern Illinois.
Standard Illinois homeowner policies cover hail damage under the named perils provision. Whether you receive Actual Cash Value (depreciated payout) or Replacement Cost Value (full replacement cost) depends on your policy terms and roof age. Many Illinois policies now include cosmetic damage exclusions that limit coverage for hail below a functional damage threshold — check your policy's Roof Payment Schedule and Cosmetic Damage Exclusion sections before the adjuster visit.
Illinois does not have a single statewide residential roofing contractor license. The City of Chicago requires a BACP Roofing Contractor License for work within city limits — verify at chicago.gov. In the collar counties, licensing requirements are set at the municipal level and are typically enforced through the building permit process. Any full roof replacement in Illinois requires a building permit through your local municipality.
Document before calling a contractor. Photograph all soft metal at ground level — gutters, downspouts, window screens, AC condenser fins — with location services on so the metadata time-stamps and geo-tags the photos. Pull the official storm event record from the NOAA Storm Events Database (ncdc.noaa.gov/stormevents) for your county and date. Then call your insurer to open the claim and schedule an adjuster inspection. Get an independent roof inspection from a licensed contractor before the adjuster arrives.
File a complaint with the Illinois Department of Insurance at insurance.illinois.gov. The IDI regulates all carriers doing business in Illinois and has authority to investigate claims handling complaints including unreasonable delays, inadequate investigations, and unjustified denials. The Illinois Insurance Code (215 ILCS 5) governs carrier obligations and claim response timelines.
Yes. A contractor offering to cover, absorb, or waive your deductible is describing an insurance fraud scheme — typically by inflating the claim to offset the deductible — which exposes both the contractor and the homeowner to liability under Illinois insurance law. This offer is one of the clearest warning signs of a storm chaser operation. Decline and report any such offer to the Illinois Department of Insurance at insurance.illinois.gov.
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