Hail in Jefferson County, WI
NOAA radar has confirmed 4 hail events of 1 inch or larger in Jefferson County since 2025, the largest 2.5″ (tennis ball) on April 14, 2026. The most recent confirmed hail was April 17, 2026.
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About Jefferson County, WI
Jefferson County sits in southeastern Wisconsin between Madison and Milwaukee, a landscape of glacial moraines, lakes, and farm country. Strong storms are not frequent, but the county can see sizable hail when spring systems sweep through and a passing front sharpens the lift enough to grow stones the size of golf balls or larger. The Milwaukee (KMKX) radar lies just about 12 miles to the east, near enough to give close low-level detail over the county.
The hail record for Jefferson County, WI
This year has run hot: 3 confirmed events in 2026 already, ahead of the recent pace.
April is the peak, but the broader risk stretches across spring and into early summer.
Damaging hail is the exception rather than the rule in Jefferson County, but the record shows it does reach 2.5″ when it arrives.
Common questions
How often does it hail in Jefferson County?
NOAA radar has confirmed 4 severe hail events (1 inch or larger) in the Jefferson County area since 2025.
When is hail season in Jefferson County?
Hail in Jefferson County is concentrated in April, within a season that runs spring into early summer.
What's the largest hail recorded in Jefferson County?
Radar confirmed 2.5-inch hail, about tennis ball size, on April 14, 2026.
Does homeowner's insurance cover hail damage?
Hail is a covered peril under most standard homeowner's policies (typically HO-3), subject to your deductible. Whether you have replacement-cost or actual-cash-value coverage makes a big difference in what's paid out. Your declarations page will say which.
Is hail getting worse in Jefferson County?
Nationally, the research on long-term hail trends is mixed. Better radar coverage since the 1990s makes real increases hard to separate from improved detection. In Jefferson County, 3 confirmed events have been recorded in 2026 so far, but the tracked record is still short, so it isn't evidence of a lasting trend.
Did it hail in Jefferson County in 2026?
Yes, 3 confirmed hail events so far in 2026, most recently April 17, 2026.
How much does hail roof damage cost to repair?
It ranges widely. Minor repairs can run a few hundred dollars, while a full roof replacement on an average home often runs $8,000–$20,000+ depending on size, pitch, and material. What you actually pay depends on your deductible and whether your policy is replacement-cost or actual-cash-value.
Recent confirmed hail near Jefferson County, WI
What this means for your home
Damage can be invisible from the ground
At Jefferson County's typical sizes, hail often bruises shingles and loosens granules without obvious holes, shortening roof life in ways that are easy to miss until the next storm or an inspection.
Document before you repair
If you suspect hail damage, photograph it and note the storm's date before making any repairs. Undocumented or already-fixed damage is much harder to claim later.
Keep a 'before' record
Photos of your roof and exterior in good condition make new hail damage much easier to prove later. A few shots now, before the next storm, can save an argument with an adjuster over what's old wear and what's storm damage.
Replacement cost vs. actual cash value
An RCV policy pays to replace your roof at today's prices; an ACV policy subtracts depreciation for the roof's age, which can mean a much smaller check on an older roof. Knowing which you carry shapes what a hail claim is actually worth.
Get more than one estimate
After a damaging storm, reputable local roofers get busy and out-of-town crews flood in. Get multiple written estimates and verify licensing and local references before signing anything.
Know your hail deductible
Many policies in hail-prone states use a percentage deductible, often 1–2% of the home's insured value rather than a flat dollar amount. On a $400,000 home that can be $4,000–$8,000 out of pocket before coverage starts, so it's worth checking your declarations page before a storm.
Before you call your insurer
Get the radar evidence for your address.
A NOAA Radar Evidence Report documents exactly what federal radar recorded at your address - hail size, date, and signature - in a formatted PDF you can attach to a claim. Built entirely from public NOAA data.
Events are NOAA/NWS Severe Thunderstorm Warnings with confirmed hail ≥ 1 inch, matched to this county by the warning centroid. Federal public-domain data. A confirmed event indicates radar-detected hail over the area, not a guarantee of damage to any specific property.