Hail HistoryLekin › Colorado › Boulder County › Boulder
Hail history for Boulder, CO
Hail has been reported within 10 miles of Boulder on 50 days since 2006. The largest stones measured 3.00 in (tea cup) on Jun 18, 2018. Hail is most common here in June and July.
Boulder ranks #89 for hail days among the 311 U.S. cities of 100,000 or more people. Ara ranking →
Recent hail near Boulder
| Date | Size hail | Where |
|---|---|---|
| Aug 23, 2025 | 0.75 in 1-sent coin | Rollinsville 1 hail report · closest 9 mi from Boulder |
| Aug 10, 2025 | 1.00 in 25-sent coin | Niwot 3 hail reports · closest 6 mi from Boulder |
| Jul 11, 2025 | 1.00 in 25-sent coin | Louisville, Niwot 3 hail reports · closest 6 mi from Boulder |
| Jun 17, 2025 | 1.00 in 25-sent coin | Louisville 1 hail report · closest 8 mi from Boulder |
| May 18, 2025 | 1.00 in 25-sent coin | Marshall 2 hail reports · closest 2 mi from Boulder |
Lukkuun foy chukw: hail kauchuw kaachin foy, anamw, is foy kaachin anamw.
Nn̄an anam̄mool ekkar Boulder meir
Ka anam̄mool ekkar kaan Boulder
Of 50 nn̄an anam̄mool ekkar 2006, most fell in June (15) and July (12).
Anam̄mool ekkar kaan Boulder
Jun 18, 2018 · 3.00 in (tea cup) · Superior (9 mi from Boulder)
Jun 24, 2006 · 2.50 in (tennis ball) · Boulder (2 mi from Boulder)
Jul 5, 2019 · 2.50 in (tennis ball) · Louisville (8 mi from Boulder)
Jul 3, 2007 · 2.00 in (hen egg) · Rollins (9 mi from Boulder)
Jun 22, 2009 · 2.00 in (hen egg) · Crescent (9 mi from Boulder)
Damaging thunderstorm winds near Boulder
17 reports of damaging thunderstorm wind within 10 miles of Boulder since 2006, on 12 days. The strongest measured gust was 75 mph on Jul 10, 2011.
| Date | Strongest gust | Where |
|---|---|---|
| Jul 10, 2025 | 64 mph, a measured | Jefferson Co Airport 1 wind report |
| Jul 20, 2024 | 61 mph, a measured | Niwot 1 wind report |
| Jul 31, 2023 | 61 mph, a measured | Superior 1 wind report |
| Jun 6, 2020 | 63 mph, a measured | Gold Hill, Louisville 2 wind reports |
| Jun 17, 2019 | 62 mph, a measured | Boulder Airport 1 wind report |
| Aug 3, 2018 | 67 mph, a measured | Gold Hill, Boulder, Jefferson Co Airport 3 wind reports |
| Sep 18, 2013 | 66 mph, a measured | Boulder 1 wind report |
| Jul 10, 2011 | 75 mph, a measured | Superior, Louisville 2 wind reports |
| Jun 30, 2011 | 64 mph, a measured | Boulder Airport 1 wind report |
| Aug 19, 2010 | 62 mph, a measured | Boulder 2 wind reports |
Severe thunderstorm wind means gusts of 58 mph or more, or wind that caused damage. Measured gusts come from weather stations; estimated ones from spotters and damage surveys.
Filing a roof or car hail claim?
Insurers ask for the date of loss. The dates on this page are when hail was reported near Boulder; 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.
Cities nearby
- Westminster
70 hail days - Arvada
81 hail days - Thornton
69 hail days - Lakewood
87 hail days - Denver
99 hail days - Aurora
89 hail days - Highlands Ranch
85 hail days - Centennial
124 hail days
Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then). Distances are measured from the center of Boulder.
Run a roofing company or a local news site? Show Boulder's hail history on your website with our free widget →
Roofing or restoration company? Get an email within the hour when hail is reported near Boulder with our hail alerts ($29 a month) →