Hail Reports in Oshkosh, Wisconsin — Last 90 Days

Oshkosh is not hail alley, but it is not exempt either — the area averages about 4 hail-producing storms a year. When a cell does track over the county, the reports below tell you the date, the stone size, and how close it came.

Oshkosh's Storm-Climate Context

Oshkosh endures a humid continental climate with long cold winters and 39.2 inches of average annual snowfall -- a persistent snow load that stresses rafters, triggers ice dam formation at eaves, and accelerates shingle granule loss through freeze-thaw cycling. The record high of 107 F and record low of -34 F in February define a wide thermal range that is among the most punishing in the Midwest for roofing membranes and flashing seals. Late-spring to early-fall precipitation peaks add hail exposure. Roofs in Oshkosh face year-round mechanical stress from snow accumulation, ice, and summer storm events.

Oshkosh, with 66,816 residents in 2020, is Wisconsin's ninth-largest city with a manufacturing-anchored economy. Oshkosh Corporation, a global specialty-vehicle manufacturer, is the city's signature employer. The University of Wisconsin-Oshkosh, the state's third-largest university with approximately 15,000 students, adds institutional building stock. EAA AirVenture draws more than 600,000 visitors annually, spurring hospitality and commercial development that drives roofing maintenance and upgrade demand.

Hail Events Near Oshkosh by Date

August 18, 2026 — 2 reports, hail up to 1.00″ (quarter size)

July 1, 2026 — 18 reports, hail up to 3.25″ (baseball size) Largest in 90 days

Preliminary Local Storm Reports from the NOAA Storm Prediction Center. Sizes are reported hailstone diameters; times are UTC. Reports can be added or corrected for about a day after each event. A quiet page section ≠ no hail — smaller or unreported events happen. The closest report in this window landed 14.4 miles from Oshkosh's center.

Circle positions are the NOAA SPC report coordinates; tap a circle for the date and hail size.

Hail size: < 1″ 1–1.75″ ≥ 2″ not recorded

How Severe Was It? The NWS Yardstick, Applied to Oshkosh's Reports

The National Weather Service calls hail severe at 1″ (quarter size) and significant at 2″ (hen-egg size). Scoring the 20 Oshkosh-area reports (filed in Fond du Lac County) against that scale: 6 reached the significant 2″+ tier — stones that crack shingles and break skylights outright, not just bruise them, plus 14 in the severe 1″–2″ band. Damage at these sizes is rarely visible from the ground but is typically covered by homeowners insurance when documented promptly.

What to Do If Your Roof Was in the Hail Path

1. Do a ground-level walk-around. Hail is rare enough around Oshkosh that most homeowners never think to check — look for granules collecting at downspouts, dented gutters or screens, and battered plants after the August 18, 2026 reports above. Stay off the roof itself.
2. Photograph anything suspicious with dates. Even minor-looking marks matter later: this NOAA log plus dated photos connect the damage to a covered storm event instead of "gradual wear", which insurers exclude.
3. Book a free inspection rather than guessing. Bruised shingles and granule loss are invisible from the ground; a written scope from a local roofer settles whether there is a claim at all.
4. Only involve the insurer once you know the scope. If the inspection finds nothing, you have lost nothing; if it finds damage, file within your policy's window while the event date is easy to prove.
5. Bring the written scope to the adjuster. Full walkthrough in the roof insurance claim guide.

Hail History in Oshkosh — the 10-Year Picture

NOAA's 10-year archive shows 13 hail events in Oshkosh's county — roughly 1 per year — with hail up to 1.00″. For comparison, the last 90 days alone brought 2 hail days within 25 miles of Oshkosh (this page's window). Oshkosh averages roughly 4 hail-producing storms per year. In a market with repeat hail, impact-resistant Class 4 shingles often pay for themselves through insurer premium discounts — worth discussing with a Oshkosh roofer if a recent event tips you into a replacement. Check your own address on the hail risk lookup.

Oshkosh's county logged fewer hail events than the Wisconsin median (24 per county over 10 years), placing it on the lower end of the state's hail exposure spectrum — though individual storm cells can still produce damaging hail regardless of the long-term average.

Oshkosh's County, Year by Year (NOAA Archive)

NOAA Storm Events archive, Oshkosh's county. Years with no row logged no hail events.

The county's busiest hail year in the archive was 2020 (4 recorded events), while the largest stone on record — 1.00″ — fell in 2024. If your roof predates 2020 and has never had a documented inspection, assume it has taken at least one unexamined hit.

Hail in Oshkosh — Questions Homeowners Ask

Check Your Own ZIP in Oshkosh

The county-level history above averages over the whole area. For a score tied to your address, run your ZIP through the hail risk lookup — Oshkosh ZIP codes include 54901, 54902, 54903, 54904, 54906.

Oshkosh Neighborhoods — Hail Exposure Varies by Area

Hail paths track with storm cell movement, not city limits. If you're in Downtown Oshkosh, South Shore, Oshkosh West, Hoffman Park or Westwood, check your specific street against the report locations above — distance from Oshkosh's center is listed for each report.

More Resources

Roofing contractors in Oshkosh · Storm damage repair in Oshkosh · Insurance claim guide · Roof replacement costs in Oshkosh · Emergency roof repair