Hail in Grantsburg, WI

The most recent recorded hail in Grantsburg fell on Jul 4, 2026. 3 hail days have been recorded since Jun 9, 2026.

The highest radar-indicated hail size recorded in Grantsburg was 1" — about the size of a quarter — on Jul 4, 2026. That figure is a radar-estimated size, not a ground measurement.

Overview recorded 3 hail days in Grantsburg over the last 12 months. Hail season in Grantsburg peaks June–July. Across all records, 3 hail days have been logged since Jun 9, 2026.

Grantsburg has had 3 recorded hail storms in the last 24 months. Homeowner insurance policies commonly allow one to two years to file a hail-damage claim, but deadlines vary by policy and state — check your policy or ask a roofer for an inspection. This is general information, not legal or insurance advice.

Roughly 5 homes sit inside Grantsburg's recorded hail footprints, based on building-footprint data intersected with the recorded hail.

Use Overview on iPhone to explore Grantsburg hail, choose a recommended area or draw your own, and work the addresses inside it. The iPhone onboarding trial lasts 7 days, includes 200 addresses, and requires no card to start. Optional homeowner contacts cost $0.21 each where available. Web checkout has separate trial terms; see the pricing page.

Each Grantsburg storm date is drawn from two radar surfaces — NEXRAD hail signatures and a radar-estimated hail size — with the NWS ground reports filed that day shown beside them. Radar is not ground truth: it can run larger or smaller than what fell, and it cannot see a single roof. Use the map to rank where to inspect first, then let the inspection decide.

We use them: every NWS report filed over Grantsburg is pinned to the map. What Overview adds is every storm date rendered as a swath over the streets, the estimated hail size in inches, a replay of any past day, the count of homes under the footprint, and the homeowner list for whatever shape you draw.