Jefferson County, Nebraska Hail Map & History
Jefferson County was hit as recently as 2026-06-20, 86 days ago. Jefferson 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 2026-05-16 near Plymouth.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Nebraska. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-06-20, around Jansen. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Jefferson 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 Jefferson County
NOAA's Storm Prediction Center has logged 48 separate hail days here since 2010 -- 2.8 a year over 17 years of record. Those days carry 109 separate reports between them, two or three on a typical one. Exactly one year since 2010 passed with no reported hail day at all. The busiest single year was 2026, with 6 hail days. The last five years track the long-run rate, with 13 days since 2022.
10 of the 48 days reached 2 inches or more -- 21%, or about one hail day in 5, the last on 2026-05-16. Those big days do not follow the county's usual calendar: most of them fall in June, not May. 17 of the 48 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Nebraska, see the Nebraska hail map and history.
Hardest-hit places in Jefferson County
Reports cluster nearest Fairbury -- 24 of the county's 48 hail days -- then Plymouth (8), Reynolds (6), Jansen (6) and Diller (5). That one town is named on 50% of them. Beyond those, NOAA names Daykin, Steele City, Endicott, Harbine, Alexandria and Swanton on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Fairbury | 8 | 1.75″ |
| Plymouth | 6 | 2.00″ |
| 6 W Fairbury | 5 | 1.25″ |
| Jansen | 5 | 1.00″ |
| Steele City | 3 | 2.50″ |
When it hails in Jefferson County
The season runs March through July: 39 of the 48 hail days on record fall in those 5 months (81%). May is the single busiest month, with 16 of them (33%). That peak sits inside the window rather than at either end. Hail has also been reported in August, September and October, outside that window. Reports span 8 of the 12 calendar months; the other 4 have never produced one.
| Month | Hail days |
|---|---|
| March | 2 |
| April | 8 |
| May | 16 |
| June | 12 |
| July | 1 |
| August | 2 |
| September | 5 |
| October | 2 |
Recent Jefferson County hail days
That day put 1 report on the map, the biggest 1 inch near Jansen. 6 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-06-20 | 1.00″ | 1 |
| 2026-06-05 | 1.75″ | 1 |
| 2026-05-18 | 1.50″ | 4 |
| 2026-05-16 | 2.75″ | 5 |
| 2026-04-23 | 2.00″ | 4 |
| 2026-03-06 | 2.00″ | 5 |
| 2024-04-26 | 1.00″ | 1 |
| 2024-04-22 | 1.00″ | 1 |
How to read the Jefferson 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: Thayer County (56 hail days), Saline County (43) and Gage County (47). Jefferson County sits in between.
Thayer County · Saline County · Gage County
Back to the Nebraska hail map or the U.S. hail map.
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Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Jefferson County, Nebraska only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.