The most recent reported hail day was 2026-04-15, 107 days ago. Putnam County is hit in about half the years on record. The largest stone on record here is 3.5 inches and 3.5 times the National Weather Service's 1 inch severe criterion, reported on 2014-06-03 near Lucerne.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Missouri. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-04-15, around Unionville. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Putnam 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 16 separate hail days here since 2010 -- 0.9 a year over 17 years of record. They carry 24 reports in total: most hail days here are logged from a single spot. 7 of those 17 years produced none at all. One year dominates the record: 2024 alone produced 4 of the 16 days. The last five years track the long-run rate, with 6 days since 2022.
2 of the 16 days reached 2 inches or more -- 12%, or about one hail day in 8, the last on 2024-06-13. They land in the same month as everything else, June. Golf-ball size is rarer still: 1.75 inches or more on 3 of the 16 days.
Across the whole of Missouri, see the Missouri hail map and history.
Reports cluster nearest Unionville -- 10 of the county's 16 hail days -- then Lucerne (3) and Livonia (3). That one town is named on 62% of them.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Unionville | 5 | 1.50″ |
| 2 Ene Lucerne | 1 | 3.50″ |
| 5 NNW Livonia | 1 | 2.75″ |
| 4 N Livonia | 1 | 2.50″ |
| 2 E Lucerne | 1 | 1.75″ |
The season runs March through June: 14 of the 16 hail days on record fall in those 4 months (88%). June is the single busiest month, with 6 of them (38%). That peak closes the window: the season builds all the way to its worst month and then stops. Hail has also been reported in August, outside that window. Reports span 5 of the 12 calendar months; the other 7 have never produced one.
| Month | Hail days |
|---|---|
| March | 2 |
| April | 3 |
| May | 3 |
| June | 6 |
| August | 2 |
That day put 1 report on the map, the biggest 1 inch near Unionville. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-04-15 | 1.00″ | 1 |
| 2024-08-27 | 1.25″ | 1 |
| 2024-06-13 | 2.75″ | 2 |
| 2024-05-23 | 1.00″ | 1 |
| 2024-04-16 | 1.00″ | 1 |
| 2023-03-31 | 1.50″ | 2 |
| 2020-05-24 | 1.00″ | 1 |
| 2019-08-20 | 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 3.5 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, over the state line included: Sullivan County (21 hail days), Schuyler County (13), Adair County (22) and Appanoose County, Iowa (18). Putnam County sits in between.
Sullivan County · Schuyler County · Adair County · Appanoose County, Iowa
Back to the Missouri hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Putnam County, Missouri only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.