Hail HistoryImam › Colorado › Boulder County
Hail history for Boulder County, CO
209 hail reports in Boulder County since 2006 on 67 days. The largest stones measured 3.00 in (tea cup) on Jun 18, 2018.
Cities in Boulder County
- Boulder
50 hail days - Longmont
54 hail days - Lafayette
71 hail days - Erie
71 hail days - Louisville
69 hail days - Superior
68 hail days - Gunbarrel
60 hail days - Niwot
62 hail days
Recent hail in Boulder County
| Date | Hail size | Where |
|---|---|---|
| Jul 28, 2026 | 1.00 in 25-cent coin | Lyons 1 hail report |
| Aug 10, 2025 | 1.00 in 25-cent coin | Niwot, Lafayette 5 hail reports |
| Jul 11, 2025 | 1.00 in 25-cent coin | Louisville, Niwot, Lafayette 4 hail reports |
| Jun 17, 2025 | 1.00 in 25-cent coin | Louisville, Lafayette 5 hail reports |
| May 18, 2025 | 1.00 in 25-cent coin | Marshall 2 hail reports |
One row per day: the largest hail reported in the county that day, the places and the number of reports.
Hail days in Boulder County by year
When hail season peaks in Boulder County
Damaging thunderstorm winds in Boulder County
21 reports of damaging thunderstorm wind in Boulder County since 2006, on 16 days. The strongest measured gust was 75 mph on Jul 10, 2011.
| Date | Strongest gust | Where |
|---|---|---|
| Jul 28, 2026 | 55 mph, imwin | Pinewood Springs 1 wutuk wind |
| Jul 20, 2024 | 61 mph, imwin | Niwot 1 wutuk wind |
| Jul 31, 2023 | 61 mph, imwin | Superior 1 wutuk wind |
| Jun 6, 2020 | 63 mph, imwin | Gold Hill, Louisville 2 wutuk wind |
| Jun 28, 2019 | 58 mph, imwin | Longmont Muni Airport 1 wutuk wind |
| Jun 17, 2019 | 62 mph, imwin | Boulder Airport 1 wutuk wind |
| Aug 3, 2018 | 67 mph, imwin | Gold Hill, Boulder 2 wutuk wind |
| Aug 4, 2017 | 70 mph, ekkar | Niwot 1 wutuk wind |
| Mar 30, 2014 | 72 mph, imwin | Longmont 1 wutuk wind |
| Sep 18, 2013 | 66 mph, imwin | Boulder 1 wutuk wind |
Wind imwin thunderstorm ej 58 mph anikaj, im wind ej kajjitok dmg. Imwin wind ej imwin eokta weather stations; ekkar ej imwin eokta spotters im dmg surveys.
Jabdoñ eo an roof im hail?
Insurers ask for the date of loss. The dates on this page are when hail was reported near Boulder County; hail can hit one street and miss the next, so a report is not proof of damage at your address. A licensed roofer or your insurance adjuster can inspect the roof. Many policies set a time limit for filing a claim — check yours.
Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then).