Hail history for Franklin County, IA

Franklin County has 125 recorded hail events in the NOAA Storm Events Database — 90 of them 1″ or larger and 5 at 2″ or larger. The largest on record: 3.0″ (tea cup) on July 4, 1961.

Records 1950–present Data through April 2026 Peak month May

Core sample · every recorded event, 1955–2026

Mark size = measured hail diameter; slivers are events with no recorded size. Amber ≥2″, red ≥2.75″ (baseball class). Denser recent decades partly reflect better reporting, not only more storms.

Recorded events 125 since 1961

1″ or larger 90 NWS severe threshold

2″ or larger 5 hen egg class and up

Largest recorded 3.0″ tea cup · July 4, 1961

Read the record honestly: Storm Events contains what was reported to the National Weather Service. Sparse or rural counties under-report, and coverage improved sharply after the mid-1990s — a quiet-looking stretch is not proof nothing fell.

When it hails in Franklin County

Recorded events by month, 1950–present. The amber bar marks Franklin County's peak: May.

Most recent recorded events

Latest 8 of 125 recorded events · data through April 2026
Date	Size	Comparable to
September 16, 2025	1.0″	Quarter
September 16, 2025	0.75″	Penny
July 19, 2025	1.75″	Golf ball
April 18, 2025	1.0″	Quarter
April 18, 2025	1.75″	Golf ball
April 18, 2025	1.75″	Golf ball
April 18, 2025	1.0″	Quarter
August 11, 2023	1.0″	Quarter

Looking for a specific storm? Use the did-it-hail date lookup for Franklin County.

From the storm reports

Narratives as filed with the NOAA Storm Events Database (public records; lightly trimmed for length).

September 16, 2025 · 0.75″ (penny)

Delayed report from mping.

July 19, 2025 · 1.75″ (golf ball)

Delayed report, time estimated by radar.

June 15, 2017 · 2.0″ (hen egg)

Public reported up to 2 inch size hail.

Events by decade

1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s
0	3	3	5	19	42	38	15

The climb across decades is largely a reporting story: spotter networks, radar, and digital filing pulled far more storms into the record after the 1990s.

Questions about hail in Franklin County

Has it ever hailed in Franklin County?

Yes — 125 hail events have been recorded for Franklin County, IA in the NOAA Storm Events Database since 1961, including 90 of 1″ (quarter size) or larger.

When did it last hail in Franklin County?

The most recent recorded hail event for Franklin County, IA is September 16, 2025, with 1.0″ (quarter) hail. The database is currently updated through April 2026, so a storm from the last few weeks may not appear yet. To check a specific day, use the did-it-hail date lookup.

What is the largest hail ever recorded in Franklin County?

3.0″ (tea cup), recorded on July 4, 1961. Hail that size is destructive-class and typically damages roofs, vehicles, and siding. See how big that really is on the actual-size hail chart.

Does a recorded hail event mean my roof was damaged?

No. This page reports storm records, not damage. Hail size and damage vary block by block within a county, and only an inspection can establish what happened to a specific roof. If you suspect damage, talk to your insurer or a licensed roofer — they can pull the same NOAA records for your claim.

More Iowa hail history

All 99 Iowa counties, ranked by recorded hail →

Source: NOAA/NCEI Storm Events Database, public domain, updated monthly by NCEI — this site's copy runs through April 2026. HailHistory reports records; it does not give insurance advice or assess damage.