Hail history and roofing help for Thornton, CO
NOAA recorded hail 1 inch or larger in or near Thornton on 16 days from 2016 to 2025, about 2 a year, and hail 2 inches or larger on 2 of those days. The most recent was on Jun 26, 2026 (preliminary), with hail up to 1.00 in (quarter).
Data updated Oct 26, 2026. NOAA's final record runs through Jun 30, 2026; later reports are preliminary. Thornton is a city in Adams County, population 147,766 (Census estimate for 2025).
Hail statistics
Storm data is directional and may be delayed; verify on-site.
"Near Thornton" means inside its boundary or within 3 km (2 miles) of it, because NOAA rounds report locations to about 1 km. Source: NOAA NCEI Storm Events Database, final record through Jun 30, 2026; preliminary NWS Local Storm Reports after that.
Hail near Thornton by year
| Year | Hail days | 1 in+ days | 2 in+ days | Largest | Reports |
|---|---|---|---|---|---|
| 2026 preliminary | 1 | 1 | 0 | 1.00 in (quarter) | 3 |
| 2025 | 1 | 1 | 0 | 1.25 in (half dollar) | 11 |
| 2024 | 3 | 1 | 1 | 2.00 in (hen egg) | 21 |
| 2023 | 4 | 4 | 0 | 1.25 in (half dollar) | 11 |
| 2022 | 0 | 0 | 0 | — | 0 |
Hail days count dates with at least one report of hail 0.75 inch or larger. Source: NOAA NCEI Storm Events Database, final record through Jun 30, 2026; preliminary NWS Local Storm Reports after that.
Storm data is directional and may be delayed; verify on-site.
When hail falls near Thornton
- 0Jan
- 0Feb
- 0Mar
- 2Apr
- 10May
- 10Jun
- 8Jul
- 4Aug
- 0Sep
- 0Oct
- 0Nov
- 0Dec
Days with hail of 1 inch or larger by month, 1996–2025; the most in May.
Recent days with 1-inch hail near Thornton
| Date | Largest hail | Reports | Reported near |
|---|---|---|---|
| Jun 26, 2026 preliminary | 1.00 in (quarter) | 3 | 2 mi SSE of Broomfield; 2 mi WNW of Federal Hgt; 3 mi WNW of Northglenn |
| Jun 17, 2025 | 1.25 in (half dollar) | 11 | 3 mi WNW of Henderson; 1 mi NNE of Thornton; 2 mi WNW of Henderson |
| May 30, 2024 | 2.00 in (hen egg) | 18 | 2 mi SSW of Henderson; 2 mi ENE of Northglenn; 3 mi NE of Thornton |
| Aug 3, 2023 | 1.25 in (half dollar) | 3 | 4 mi WNW of Henderson; 1 mi SE of Northglenn |
| Jun 21, 2023 | 1.00 in (quarter) | 3 | 3 mi NE of Thornton; 4 mi NNW of Henderson |
| May 26, 2023 | 1.25 in (half dollar) | 3 | 1 mi E of Federal Hgt; 1 mi NNE of Federal Hgt; 2 mi NW of Federal Hgt |
| May 9, 2023 | 1.00 in (quarter) | 2 | 3 mi NE of Thornton; 2 mi WNW of Henderson |
| Aug 19, 2021 | 1.25 in (half dollar) | 10 | 1 mi NNE of Federal Hgt; 1 mi NW of Federal Hgt; 2 mi NNE of Northglenn |
| Aug 4, 2020 | 1.25 in (half dollar) | 2 | 4 mi SSW of Dacono |
| Jul 9, 2020 | 1.00 in (quarter) | 1 | 3 mi WNW of Brighton |
| Jul 13, 2019 | 1.00 in (quarter) | 1 | 3 mi ENE of Broomfield |
| Jul 5, 2019 | 1.00 in (quarter) | 2 | 2 mi WNW of Federal Hgt; 1 mi NW of Federal Hgt |
| Jun 8, 2019 | 1.00 in (quarter) | 3 | 2 mi NE of Henderson; 3 mi ENE of Broomfield; 3 mi E of Broomfield |
| Jul 25, 2018 | 1.00 in (quarter) | 1 | 4 mi NE of Broomfield |
| Jun 18, 2018 | 2.50 in (tennis ball) | 8 | 3 mi NW of Henderson; 2 mi WNW of Federal Hgt; 3 mi NNE of Northglenn |
| May 8, 2017 | 1.00 in (quarter) | 1 | 2 mi ENE of Westminster |
| May 24, 2016 | 1.00 in (quarter) | 2 | 1 mi SE of Northglenn |
| May 7, 2014 | 1.50 in (ping pong ball) | 4 | 2 mi SE of Broomfield; 1 mi N of Thornton; 1 mi SE of Northglenn |
| Jul 8, 2011 | 1.00 in (quarter) | 3 | 1 mi SE of Northglenn; Federal Hgt |
| May 18, 2011 | 1.75 in (golf ball) | 4 | 1 mi SSW of Thornton; 2 mi ENE of Westminster; 1 mi NW of Northglenn |
| Jun 11, 2010 | 1.75 in (golf ball) | 1 | 1 mi N of Thornton |
| Jun 10, 2010 | 1.00 in (quarter) | 4 | 1 mi NW of Welby; 1 mi SE of Northglenn; 3 mi ENE of Northglenn |
| May 26, 2010 | 1.75 in (golf ball) | 5 | 1 mi E of Northglenn; 1 mi N of Thornton; 2 mi ENE of Welby |
| Jun 14, 2009 | 1.50 in (ping pong ball) | 4 | 2 mi WNW of Federal Hgt; 1 mi NE of Northglenn; 1 mi SSW of Welby |
| Jun 2, 2008 | 1.00 in (quarter) | 1 | 2 mi WNW of Henderson |
Source: NOAA NCEI Storm Events Database, final record through Jun 30, 2026; preliminary NWS Local Storm Reports after that.
Storm data is directional and may be delayed; verify on-site.
Roof size calculator
Roofers price by the square (100 square feet of roof). This estimates your roof's area from the house's footprint and pitch.
An estimate for planning only. Hips, valleys, dormers and several roof levels change the real figure; a roofer measures before quoting.
Insurance claim windows
Homeowner policies set their own deadlines for reporting storm damage, usually counted from the date of the storm. If you think a hailstorm damaged your roof, find its date in the records above, then read the "duties after loss" section of your policy and ask your insurer or agent to confirm the deadline in writing.
Hail damage to shingles is often hard to see from the ground, and only an inspection on the roof can show whether a roof was damaged. The records here show where hail was reported, not which buildings it hit.
This is general information, not legal or insurance advice.
Hail history for nearby places
- Northglenn 4 km · 12 days with 1-inch hail, 2016–2025
- Federal Heights 9 km · 6 days with 1-inch hail, 2016–2025
- Todd Creek 9 km · 8 days with 1-inch hail, 2016–2025
- Derby 9 km · 0 days with 1-inch hail, 2016–2025
- Welby 9 km · 2 days with 1-inch hail, 2016–2025
- Broomfield 10 km · 13 days with 1-inch hail, 2016–2025
- Sherrelwood 11 km · 3 days with 1-inch hail, 2016–2025
- Shaw Heights 11 km · 6 days with 1-inch hail, 2016–2025
See also hail history for Adams County, with records back to 1955, and how we count hail days.