Linn County, Iowa Hail Map & History
Linn County was hit as recently as 2026-07-20, 56 days ago. Linn County is hit in most years, and usually several times over. The largest stone on record here is 2.75 inches, a baseball and 2.8 times the National Weather Service's 1 inch severe criterion, reported on 2020-07-11 near Walford.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Iowa. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-07-20, around Fairfax. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Linn County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
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See call-center options ->How often it hails in Linn County
NOAA's Storm Prediction Center has logged 39 separate hail days here since 2010 -- 2.3 a year over 17 years of record. Those days carry 177 separate reports between them, better than three on a typical one. 2 of those 17 years produced none at all. The busiest single year was 2024, with 5 hail days. The last five years track the long-run rate, with 14 days since 2022.
5 of the 39 days reached 2 inches or more -- 13%, or about one hail day in 8, the last on 2026-03-10. Those big days do not follow the county's usual calendar: most of them fall in June, not April. 13 of the 39 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Iowa, see the Iowa hail map and history.
Hardest-hit places in Linn County
Reports cluster nearest Cedar Rapids -- 17 of the county's 39 hail days -- then Marion (11), Hiawatha (7), Fairfax (5) and Robins (5). That one town is named on 44% of them. Beyond those, NOAA names Central City, Mount Vernon, Center Point, Alburnett, Palo, Toddville, Coggon, Nnw Springville and Prairieburg on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Marion | 6 | 1.75″ |
| Hiawatha | 5 | 2.00″ |
| Cedar Rapids | 5 | 1.75″ |
| 5 Nne Cedar Rapids | 3 | 2.50″ |
| Center Point | 3 | 1.25″ |
When it hails in Linn County
The season runs March through July: 34 of the 39 hail days on record fall in those 5 months (87%). April is the single busiest month, with 10 of them (26%). That peak sits inside the window rather than at either end. Hail has also been reported in February, August, September and November, outside that window. January, October and December are the only months that have never produced a reported hail day.
| Month | Hail days |
|---|---|
| February | 1 |
| March | 4 |
| April | 10 |
| May | 6 |
| June | 10 |
| July | 4 |
| August | 2 |
| September | 1 |
| November | 1 |
Recent Linn County hail days
That day put 1 report on the map, the biggest 1 inch near Fairfax. 4 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-07-20 | 1.00″ | 1 |
| 2026-04-17 | 1.00″ | 7 |
| 2026-04-14 | 1.75″ | 11 |
| 2026-03-10 | 2.00″ | 7 |
| 2025-08-15 | 1.50″ | 1 |
| 2024-05-27 | 1.00″ | 1 |
| 2024-05-24 | 1.00″ | 1 |
| 2024-05-23 | 1.00″ | 1 |
How to read the Linn County map
The colored swath is NOAA's MRMS radar estimate of the largest hail per ~1 km cell; the dots are SPC ground reports. Yellow is about an inch, red 1.5 to 2″, purple 2″ and up (hail size vs roof damage). On this county's worst day the reports reached 2.75 inches, which is the purple band. Look up a street address with the hail history by address tool.
Nearby counties
The nearest counties with a page of their own: Benton County (33 hail days), Jones County (21) and Johnson County (33). Linn County takes more hail than any of them.
Benton County · Jones County · Johnson County
Back to the Iowa hail map or the U.S. hail map.
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Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Linn County, Iowa only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.