HailEvidence → hail history by county → Colorado → Jefferson County
Hail dates in Jefferson County, Colorado
The National Weather Service has recorded hail in Jefferson County on 42 days since 2016 (173 separate reports, 140 of them quarter-size or larger). The largest stone on record was 2.75" (baseball) on May 8, 2017; the most recent hail was June 26, 2026. Every row below is an official NWS record. Check hail at your exact address, free →
Every hail day in Jefferson County since 2016
One row per day the NWS logged hail somewhere in the county. The narrative names the town; the free check below narrows it to your address.
| Date | Largest hail | Reports | NWS narrative |
|---|---|---|---|
| 2026-06-26 | 1.00" (quarter) | 1 | — |
| 2026-06-24 | 1.00" (quarter) | 3 | — |
| 2026-06-08 | 1.75" (golf ball) | 18 | The report was received via mPING. |
| 2025-08-23 | 1.50" (ping pong ball) | 5 | — |
| 2025-08-10 | 0.75" (penny) | 1 | The report was from mPING. |
| 2025-07-06 | 1.50" (ping pong ball) | 2 | Report from mping. |
| 2025-06-17 | 0.75" (penny) | 3 | Report from mping. |
| 2025-05-14 | 0.75" (penny) | 1 | — |
| 2024-06-29 | 1.00" (quarter) | 5 | The report was from mping. |
| 2024-05-30 | 1.25" (half dollar) | 2 | The report was via mping. |
| 2024-05-20 | 0.75" (penny) | 2 | Mping public report. |
| 2023-08-06 | 0.88" (nickel) | 1 | — |
| 2023-08-01 | 1.25" (half dollar) | 4 | — |
| 2023-07-08 | 1.25" (half dollar) | 3 | — |
| 2023-06-29 | 1.50" (ping pong ball) | 5 | — |
| 2023-06-22 | 2.50" (tennis ball) | 20 | Large hail damaged a roof and window screens. |
| 2023-06-21 | 2.00" (hen egg) | 11 | Dozens were injured at Red Rocks Park when a severe thunderstorm pummeled the venue with large hail. |
| 2023-05-26 | 1.00" (quarter) | 2 | — |
| 2022-08-20 | 1.25" (half dollar) | 2 | Hail accumulated up to 3 inches in depth. |
| 2021-09-03 | 1.00" (quarter) | 3 | — |
| 2021-08-19 | 2.00" (hen egg) | 12 | — |
| 2020-08-05 | 1.25" (half dollar) | 2 | — |
| 2019-09-06 | 1.25" (half dollar) | 3 | — |
| 2019-08-21 | 1.00" (quarter) | 2 | — |
| 2019-07-05 | 1.25" (half dollar) | 5 | — |
| 2019-07-04 | 1.50" (ping pong ball) | 5 | — |
| 2018-08-14 | 1.25" (half dollar) | 4 | — |
| 2018-07-27 | 1.75" (golf ball) | 1 | — |
| 2018-07-24 | 1.00" (quarter) | 1 | — |
| 2018-06-19 | 1.00" (quarter) | 2 | — |
| 2018-06-18 | 2.00" (hen egg) | 3 | — |
| 2018-05-28 | 1.25" (half dollar) | 4 | — |
| 2018-05-14 | 0.75" (penny) | 1 | — |
| 2017-08-08 | 0.75" (penny) | 1 | — |
| 2017-05-08 | 2.75" (baseball) | 18 | The estimated damage is for the entire episode. |
| 2017-05-07 | 0.75" (penny) | 1 | — |
| 2016-08-08 | 0.75" (penny) | 1 | — |
| 2016-07-28 | 1.50" (ping pong ball) | 5 | — |
| 2016-07-19 | 0.88" (nickel) | 1 | — |
| 2016-06-20 | 1.75" (golf ball) | 1 | — |
| 2016-05-26 | 0.75" (penny) | 1 | — |
| 2016-05-24 | 1.25" (half dollar) | 5 | — |
Hail days by year
| Year | Hail days | Reports | Largest |
|---|---|---|---|
| 2026 | 3 | 22 | 1.75" (golf ball) |
| 2025 | 5 | 12 | 1.50" (ping pong ball) |
| 2024 | 3 | 9 | 1.25" (half dollar) |
| 2023 | 7 | 46 | 2.50" (tennis ball) |
| 2022 | 1 | 2 | 1.25" (half dollar) |
| 2021 | 2 | 15 | 2.00" (hen egg) |
| 2020 | 1 | 2 | 1.25" (half dollar) |
| 2019 | 4 | 15 | 1.50" (ping pong ball) |
| 2018 | 7 | 16 | 2.00" (hen egg) |
| 2017 | 3 | 20 | 2.75" (baseball) |
| 2016 | 6 | 14 | 1.75" (golf ball) |
Damaging wind in Jefferson County
Thunderstorm wind of 58 mph or more (the NWS severe threshold), 17 reports since 2016, strongest 78 mph. Wind and tornado records are included in the extended report.
| Date | Peak gust | Reports | NWS narrative |
|---|---|---|---|
| 2020-06-06 | 78 mph | 7 | Tree branches up to one inch in diameter were snapped. |
| 2020-06-24 | 67 mph | 2 | — |
| 2022-07-27 | 66 mph | 1 | — |
| 2025-07-10 | 64 mph | 2 | The wind gust occurred at the National Wind Technology Center. |
| 2018-08-03 | 62 mph | 1 | — |
| 2020-06-25 | 60 mph | 1 | — |
| 2018-08-14 | 60 mph | 1 | Strong winds and hail caused extensive tree damage. |
| 2018-06-06 | 60 mph | 2 | Strong winds snapped tree branches, three inches in diameter. |
Was hail recorded at your Jefferson County address? Check free
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Address lookup by the U.S. Census Bureau geocoder. Records: NOAA NCEI Storm Events (final) plus SPC preliminary reports for storms newer than the latest compile — see methodology.
Need it in writing for a claim?
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10-year hail history for one address + the disputed-date finding.
15-year window, wind & tornado records, plus a drafted claim-appeal letter.
Questions
What date did hail last hit Jefferson County?
June 26, 2026, per the NWS Storm Events record. The largest since 2016 was 2.75" (baseball) on May 8, 2017.
Does a county record prove hail at my house?
No. NWS records are point and path observations. The absence of a nearby report does NOT prove that no hail fell at this address — it means no observation was logged nearby. A report of nearby hail documents the event; it does not by itself prove damage to a specific structure. The free check above shows what was recorded near your specific address, with distances.
Nearby counties
Denver County, CO (12 mi) · Boulder County, CO (24 mi) · Arapahoe County, CO (24 mi) · Douglas County, CO (26 mi) · Adams County, CO (27 mi) · Teller County, CO (55 mi) · Larimer County, CO (58 mi) · Weld County, CO (59 mi)
See also: Colorado hail history by city · all counties