The most recent reported hail day was 2024-06-22 -- 2 years ago, with nothing reported since. Oswego County is hit in about half the years on record. 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 2017-05-18 near Volney.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in New York. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2024-06-22, around Fulton. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Oswego 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 14 separate hail days here since 2010 -- 0.8 a year over 17 years of record. Those days carry 41 separate reports between them, two or three on a typical one. 8 of those 17 years produced none at all. One year dominates the record: 2017 alone produced 3 of the 14 days. The last five years track the long-run rate, with 4 days since 2022.
Most hail here stays under 2 inches: only 1 of the 14 days on record passed it, 7%, the last on 2017-05-18. They land in the same month as everything else, May. Golf-ball size is rarer still: 1.75 inches or more on 2 of the 14 days.
Across the whole of New York, see the New York hail map and history.
Reports cluster nearest Central Square -- 4 of the county's 14 hail days -- then Hastings (3), Fulton (3), Palermo (2) and Phoenix (2). Beyond those, NOAA names Oswego on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Hastings | 3 | 1.75″ |
| Central Square | 3 | 1.25″ |
| Fulton | 2 | 1.50″ |
| Oswego | 2 | 1.00″ |
| 1 Nw Palermo | 1 | 2.50″ |
The season runs May through August: 13 of the 14 hail days on record fall in those 4 months (93%). May is the single busiest month, with 5 of them (36%). That peak opens the window: the season starts at its worst and eases off from there. Hail has also been reported in September, outside that window. Reports span 5 of the 12 calendar months; the other 7 have never produced one.
| Month | Hail days |
|---|---|
| May | 5 |
| June | 4 |
| July | 2 |
| August | 2 |
| September | 1 |
That day put 2 reports on the map, the biggest 1.5 inches near Fulton. No hail day has been reported here yet this year.
| Date | Max hail | Reports |
|---|---|---|
| 2024-06-22 | 1.50″ | 2 |
| 2023-08-03 | 1.25″ | 3 |
| 2022-06-16 | 1.25″ | 1 |
| 2022-05-21 | 1.25″ | 2 |
| 2017-08-12 | 1.00″ | 1 |
| 2017-06-26 | 1.00″ | 1 |
| 2017-05-18 | 2.50″ | 13 |
| 2016-07-18 | 1.00″ | 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: Onondaga County (19 hail days), Cayuga County (19) and Madison County (18). Every one of them takes more hail than Oswego County.
Onondaga County · Cayuga County · Madison County
Back to the New York hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Oswego County, New York only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.