Washington County was hit as recently as 2026-07-04, 27 days ago. Washington County is hit in most years, and usually several times over. The largest stone on record here is 2.5 inches, a tennis ball and 2.5 times the National Weather Service's 1 inch severe criterion, reported on 2019-05-22 near Vera.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Oklahoma. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-07-04, around Bartlesville. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Washington County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
Get free access Check an addressOur US-based call center calls the homeowners in this storm and books roof inspections straight onto your calendar. You work the storm; we fill the schedule. We dial -- you do not have to knock a single door.
See call-center options ->NOAA's Storm Prediction Center has logged 40 separate hail days here since 2010 -- 2.4 a year over 17 years of record. They carry 61 reports in total: most hail days here are logged from a single spot. 2 of those 17 years produced none at all. The busiest single year was 2011, with 5 hail days. The last five years track the long-run rate, with 11 days since 2022.
Most hail here stays under 2 inches: only 2 of the 40 days on record passed it, 5%, the last on 2026-04-15. They land in the same month as everything else, April. 12 of the 40 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Oklahoma, see the Oklahoma hail map and history.
Reports cluster nearest Bartlesville -- 19 of the county's 40 hail days -- then Copan (10), Dewey (7), Ochelata (6) and Vera (3). That one town is named on 48% of them. Beyond those, NOAA names Ramona on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Bartlesville | 13 | 1.75″ |
| Copan | 5 | 1.75″ |
| 2 SE Bartlesville | 3 | 1.25″ |
| Vera | 2 | 1.75″ |
| 3 E Bartlesville | 2 | 1.50″ |
The season runs March through June: 32 of the 40 hail days on record fall in those 4 months (80%). April is the single busiest month, with 15 of them (38%). That peak sits inside the window rather than at either end. January, September and December are the only months that have never produced a reported hail day.
| Month | Hail days |
|---|---|
| February | 1 |
| March | 5 |
| April | 15 |
| May | 10 |
| June | 2 |
| July | 2 |
| August | 2 |
| October | 1 |
| November | 2 |
That day put 1 report on the map, the biggest 1 inch near Bartlesville. 4 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-07-04 | 1.00″ | 1 |
| 2026-05-08 | 1.00″ | 1 |
| 2026-04-28 | 1.25″ | 4 |
| 2026-04-15 | 2.00″ | 5 |
| 2025-06-17 | 1.75″ | 1 |
| 2025-05-19 | 1.00″ | 1 |
| 2025-04-28 | 1.25″ | 1 |
| 2024-05-15 | 1.75″ | 2 |
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 2.5 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: Nowata County (15 hail days), Osage County (59), Rogers County (44), Montgomery County, Kansas (52) and Chautauqua County, Kansas (29). Washington County sits in between.
Nowata County · Osage County · Rogers County · Montgomery County, Kansas · Chautauqua County, Kansas
Back to the Oklahoma hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Washington County, Oklahoma only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.