Hail Season and Roofs in Denver

Hail is the most expensive weather risk most Denver roofs face, and the season peaks in early summer. After a storm, check gutters and vents from the ground, cover any openings, file your claim promptly and get a written inspection. Colorado law bars roofers from paying or waiving your deductible, and Denver requires a permit for most reroofs.

When is hail season in Denver?

Late spring through summer, with the peak in mid-June. The Colorado Climate Center at Colorado State University reports that severe hail reports climb through spring and "the peak is in mid-June," a little later than tornado season (Colorado Climate Center). The same post notes that severe storms happen much more often in eastern Colorado than on the Western Slope, and that a storm in Yuma County on August 8, 2023 produced a 5.25-inch hailstone, a new state record pending final confirmation.

The Insurance Institute for Business & Home Safety (IBHS) adds that the number of hail days across Colorado has increased over the past decade, even as the season itself has gotten shorter (IBHS).

What that means for you:

• Plan for storms from May through August, with June the most likely month.
• Check after each storm, not just at the end of the season. A roof that took hail in June may face more hail in July.
• Afternoon and evening storms are common, but the Colorado Climate Center has also recorded overnight hail on the Front Range.

Why does hail seem to do more damage in Denver?

Altitude plays a part. IBHS explains that the thinner air at higher elevations "reduces drag forces and results in higher kinetic energy on impact." It gives a simple example: "a 1-in. hailstone that falls in Denver has the same energy as a 1.2-in. hailstone would in Dallas" (IBHS).

IBHS also notes that higher-elevation storms "typically produce more hailstones per square foot than elsewhere in the country." It is careful to say the research isn't settled on whether the extra energy is enough to change the size of hail that damages a given shingle. Still, the practical point stands: modest-looking hail in Denver can hit harder than the same size stone at sea level. If you have family in Texas, our Dallas–Fort Worth hail guide covers how things differ there.

How costly have Denver hailstorms been?

Some of the most expensive insured events in Colorado history were Denver-area hailstorms. Figures below come from the Rocky Mountain Insurance Information Association, as reported in the press:

• May 8, 2017, Front Range: $2.3 billion in insured losses, with approximately 167,000 auto claims and 100,600 homeowners claims (Claims Journal).
• July 20, 2009, Denver metro: $767.6 million in insured damage at the time (Denver7).
• July 11, 1990, Denver metro: $625 million in insured damage at the time (Denver7).
• June 6–15, 2009, Denver metro: $353.3 million (Denver7).
• October 1, 1994, Denver metro: $225.0 million, a reminder that damaging hail can come outside the summer peak (Denver7).
• September 29, 2014, Denver metro: $213.3 million (Denver7).

The older figures are in the dollars of the year they happened, so they understate what the same storm would cost today. The pattern is what matters: the Denver metro has been hit again and again, with damaging storms on record from June into October.

Big storms bring a rush of claims and contractors. That is when it pays most to slow down, document carefully and compare written estimates.

What is Denver's climate like for a roof?

Dry, sunny and swinging between hot and freezing. Based on NOAA's 1991–2020 climate normals for Denver International Airport, the area averages about 14.5 inches of precipitation a year, about 46 days at or above 90°F, and about 156 days with a low at or below freezing (NOAA climate normals, Denver Airport).

That mix matters because:

• Hail-damaged shingles may not leak right away. Denver's dry climate means a cracked shingle can sit for weeks before a heavy storm or spring snowmelt finds it.
• Freeze and thaw is frequent. Water that gets into a damaged spot can freeze overnight and thaw by afternoon, which can widen small openings.
• Snow sits on roofs in winter and spring. Melting snow can reach the same weak spots that rain would.

What does hail damage look like from the ground?

Often, not much. Hail bruises and knocked-off granules are hard to see from the yard, and you should not climb onto the roof to look. A pro inspects up close with safety gear.

What you can safely check:

• Dents in gutters, downspouts, roof vents and the metal flashing you can see.
• Granules collected in gutters or washed out at the downspouts. They look like coarse sand.
• Damage nearby: dented cars, torn window screens, chipped paint, dented air conditioner fins.
• Stains on ceilings or in the attic after the next rain or snowmelt.
• Shingles on the ground or edges that look lifted.

If water is coming through a ceiling near a light, outlet or fan, keep away from it. Switch that circuit off at the breaker only if you can do it without standing in water.

What should you do after a Denver hailstorm?

Protect the house, then build your record. A sensible order:

1. Photograph and video what you can see from the ground, including dented metal and any interior stains. Note the date and time of the storm.
2. Cover open holes or broken windows to keep weather out, and keep receipts for any temporary repair.
3. Call your insurer or agent to start a claim and ask for your filing deadline in writing.
4. Get a written inspection from a roofing company that shows the damage slope by slope.
5. Be there for the adjuster's visit if you can, and ask that the roofer's findings be reviewed too.
6. Hold off on a full replacement until your insurer has seen the damage, unless they tell you otherwise.

Our guide to roof damage insurance claims goes deeper on adjuster visits and disputes.

What are your rights with a roofer in Colorado?

Colorado has a residential roofing law with protections that matter after a hailstorm:

• No deductible deals. A roofing contractor paid from insurance proceeds "shall not advertise or promise to pay, waive, or rebate all or part of any insurance deductible" (Colorado Revised Statutes 6-22-105).
• A right to cancel if your claim is denied. If your roofing contract will be paid by insurance, you may cancel it within 72 hours after you receive written notice that the claim is denied in whole or in part (Colorado Revised Statutes 6-22-104).
• A written contract before work starts. Colorado law spells out what a residential roofing contract must include: the scope and materials, approximate dates and costs, the contractor's physical address and contact details, its cancellation and deposit refund policy, a statement of your right to cancel, and a statement that it can't pay or waive your deductible. It also requires a bold statement that your payments are held in trust until materials are delivered or most of the work is done (Colorado Revised Statutes 6-22-103).

If anyone offers to "take care of" your deductible, treat that as a reason to keep looking. These summaries aren't legal advice; read the statute or ask an attorney about your situation.

Do you need a permit to reroof in Denver?

Usually, yes. The City and County of Denver says "a roof permit is always applied for separately from the general construction permit," and that repairs covering more than 10% of the roof or two roof squares, whichever is smaller, need a roof permit (Denver Development Services). Homes that are landmarks or in historic districts get an extra review.

Denver's Roofing Guide and Checklist adds several rules worth knowing before you sign (City and County of Denver):

• Two layers is the limit. Existing roofs must be removed to the deck where two or more layers already exist.
• Wind ratings depend on where you live. Shingles must meet a 115 mph minimum east of Federal Boulevard, 125 mph between Federal and Sheridan, and 140 mph between Sheridan and Kipling.
• Insulation may be required. If the roof cavity has no insulation and the sheathing or insulation is exposed during the reroof, the guide requires insulation above or below the sheathing.
• Final inspection. One- and two-family asphalt shingle roofs get a final roof inspection.
• Contractor licensing. The guide refers to Denver's roofing contractor license classes, such as "D-Roof Shingles." Ask any company for its Denver license and permit number.
• Ice and water shield isn't required by Denver code, though shingle makers may call for it in their instructions. Ask what the quote includes.

Suburbs such as Aurora, Lakewood and Littleton have their own building departments and rules.

What does hail repair cost?

It depends on how much of the roof was hit and whether the decking is damaged. These are national figures, not Denver prices, as of 2026:

• Hail damage repair: between $700 and $4,000 (Fixr).
• Replacing damaged or missing shingles: typically $150 to $700 (Fixr).
• Roof vent repair or replacement: a vent boot runs $75 to $250 (Fixr).
• Roof inspection: most homeowners pay between $307 and $571 (Fixr).
• Full asphalt shingle replacement: $8,000 to $16,000 (Fixr).

Denver's permit, wind-rating and insulation rules can affect what a local quote includes, so compare line items, not just totals. Our hail damage roof repair cost guide breaks the numbers down further.

Should you choose impact-resistant shingles?

If you're replacing in Denver, it's worth asking. Two points from IBHS research help:

• Labels vary. In IBHS testing of shingles that all carried an impact-resistant label, "product performance ranged from Excellent to Poor" (IBHS). Ask for the exact product and look up its IBHS rating.
• Testing is still catching up to altitude. IBHS notes that the higher-energy, high-elevation hail scenario "has not yet been tested" (IBHS).

Ask your insurer whether it offers a premium credit for a specific product before you choose.

What should you ask a roofer?

1. What is your Denver contractor license, and will you pull the roof permit?
2. What insurance do you carry, and can I see the certificate?
3. Can you show me photos of the hail hits on each slope?
4. Which shingle are you quoting, what wind rating does it carry for my area, and how does it rate in IBHS testing?
5. Will you tear off to the deck, and how will you price decking repairs?
6. Does the quote include insulation if the city requires it?
7. Is ice and water shield included, and where?
8. What does your workmanship warranty cover, and for how long?

When should you call a pro?

Call after any storm that dents gutters or vents, leaves granules in the downspouts, or brings stains inside. Call right away for active leaks, missing shingles or a limb on the roof. Stay off the roof, especially when it's wet or icy.

Bellwick is a free service that helps you understand the likely problem and can connect you with a local roofing company. Bellwick doesn't do the work itself. For a quick read on what you're seeing, check my roof.