The most recent reported hail day was 2026-04-14, 108 days ago. Bremer County is hit in most years. 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 2025-04-17 near Waverly.
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 2026-04-14, around Tripoli. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Bremer 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 ->NOAA's Storm Prediction Center has logged 20 separate hail days here since 2010 -- 1.2 a year over 17 years of record. Those days carry 44 separate reports between them, two or three on a typical one. 5 of those 17 years produced none at all. One year dominates the record: 2023 alone produced 4 of the 20 days. The last five years have run hotter than the long-run rate: 9 days since 2022, against 0.9 a year before that.
4 of the 20 days reached 2 inches or more -- 20%, or about one hail day in 5, the last on 2025-04-17. Those big days do not follow the county's usual calendar: most of them fall in April, not May. 8 of the 20 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Iowa, see the Iowa hail map and history.
Reports cluster nearest Waverly -- 7 of the county's 20 hail days -- then Readlyn (7), Denver (6), Plainfield (4) and Tripoli (3). Beyond those, NOAA names Sumner and Janesville on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Denver | 4 | 1.75″ |
| Plainfield | 4 | 1.75″ |
| Readlyn | 4 | 1.75″ |
| Waverly | 4 | 1.75″ |
| Tripoli | 3 | 1.50″ |
The season runs March through June: 16 of the 20 hail days on record fall in those 4 months (80%). May is the single busiest month, with 6 of them (30%). That peak sits inside the window rather than at either end. Hail has also been reported in July, August and September, outside that window. Reports span 7 of the 12 calendar months; the other 5 have never produced one.
| Month | Hail days |
|---|---|
| March | 2 |
| April | 5 |
| May | 6 |
| June | 3 |
| July | 1 |
| August | 1 |
| September | 2 |
That day put 1 report on the map, the biggest 1 inch near Tripoli. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-04-14 | 1.00″ | 1 |
| 2025-09-22 | 1.00″ | 1 |
| 2025-04-17 | 2.75″ | 6 |
| 2024-05-27 | 1.00″ | 1 |
| 2024-05-23 | 1.00″ | 1 |
| 2023-07-28 | 2.75″ | 3 |
| 2023-06-24 | 1.00″ | 1 |
| 2023-05-07 | 1.00″ | 1 |
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.
The nearest counties with a page of their own: Black Hawk County (23 hail days), Butler County (22) and Fayette County (23). Every one of them takes more hail than Bremer County.
Black Hawk County · Butler County · Fayette County
Back to the Iowa hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Bremer County, Iowa only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.