States › Colorado › Boulder County › Hail
Hail in Boulder County, Colorado
356 hail events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Hail.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
NCEI records 356 hail events in Boulder County, Colorado, between 1950 and 2026, spread over 54 years.
June is the busiest month, with 130 of the recorded events. The last 20 years account for 198 events against 110 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 2.3% of the 15,490 hail events recorded in Colorado; its 49.0 per 100 square miles compares with 14.9 statewide.
57 of the hail reports with a recorded size were golf-ball size (1.75 inches) or larger; the largest recorded stone was 3.00 inches (tea cup size).
Compared with Colorado
| Measure | Boulder County | Colorado | US |
|---|---|---|---|
| Hail events since 1950 | 356 | 15,490 | 424,356 |
| Per 100 square miles | 49.0 | 14.9 | 12.0 |
| Per 10,000 residents | 10.8 | 26.7 | 12.8 |
| Deaths recorded | 0 | 0 | 29 |
| Busiest month | June | June | May |
By year
Seasonality
0Feb
0Mar
1Apr
14May
63Jun
130Jul
74Aug
46Sep
19Oct
9Nov
0Dec
0
Magnitude distribution
NWS hail-size descriptors
- under 1 in
- pea to quarter
- 1–1.74 in
- quarter to golf ball
- 1.75–2.74 in
- golf ball to baseball
- 2.75–3.99 in
- baseball to softball
- 4 in and larger
- softball and larger
Hail size in inches as recorded by NCEI; events without a size are not binned.
Recorded events
The 200 events kept for this page are the 120 most recent plus the 80 with the most damage, deaths or injuries out of 356. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 10 Aug 2025 | Hail | 0.75 in | — | — | — | — | County |
| 10 Aug 2025 | Hail | 0.88 in | — | — | — | — | County |
| 10 Aug 2025 | Hail | 1.00 in | — | — | — | — | County |
| 10 Aug 2025 | Hail | 0.75 in | — | — | — | — | County |
| 10 Aug 2025 | Hail | 0.75 in | — | — | — | — | County |
| 11 Jul 2025 | Hail | 0.75 in | — | — | — | — | County |
| 11 Jul 2025 | Hail | 1.00 in | — | — | — | — | County |
| 11 Jul 2025 | Hail | 0.75 in | — | — | — | — | County |
| 11 Jul 2025 | Hail | 0.75 in | — | — | — | — | County |
| 17 Jun 2025 | Hail | 0.75 in | — | — | — | — | County |
| 17 Jun 2025 | Hail | 0.75 in | — | — | — | — | County |
| 17 Jun 2025 | Hail | 1.00 in | — | — | — | — | County |
| 17 Jun 2025 | Hail | 1.00 in | — | — | — | — | County |
| 17 Jun 2025 | Hail | 0.75 in | — | — | — | — | County |
| 18 May 2025 | Hail | 0.75 in | — | — | — | — | County |
| 18 May 2025 | Hail | 1.00 in | — | — | — | — | County |
| 20 Jul 2024 | Hail | 0.75 in | — | — | — | — | County |
| 30 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 30 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 30 May 2024 | Hail | 0.75 in | — | — | — | — | County |
| 30 May 2024 | Hail | 0.88 in | — | — | — | — | County |
| 30 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 30 May 2024 | Hail | 1.00 in | — | — | — | — | County |
| 21 Jun 2023 | Hail | 1.00 in | — | — | — | — | County |
| 12 Jun 2023 | Hail | 1.00 in | — | — | — | — | County |
| 12 Jun 2023 | Hail | 1.00 in | — | — | — | — | County |
| 26 May 2023 | Hail | 1.25 in | — | — | — | — | County |
| 26 May 2023 | Hail | 0.88 in | — | — | — | — | County |
| 9 May 2023 | Hail | 1.00 in | — | — | — | — | County |
| 9 May 2023 | Hail | 1.00 in | — | — | — | — | County |
| 9 May 2023 | Hail | 1.75 in | — | — | — | — | County |
| 9 May 2023 | Hail | 1.00 in | — | — | — | — | County |
| 1 Oct 2022 | Hail | 0.75 in | — | — | — | — | County |
| 1 Oct 2022 | Hail | 0.75 in | — | — | — | — | County |
| 27 Jul 2022 | Hail | 1.00 in | — | — | — | — | County |
| 26 Jul 2022 | Hail | 0.75 in | — | — | — | — | County |
| 16 Jun 2022 | Hail | 1.00 in | — | — | — | — | County |
| 25 Jun 2021 | Hail | 1.00 in | — | — | — | — | County |
| 2 May 2021 | Hail | 0.75 in | — | — | — | — | County |
| 31 Jul 2020 | Hail | 1.00 in | — | — | — | — | County |
| 8 Jun 2020 | Hail | 0.75 in | — | — | — | — | County |
| 11 Sep 2019 | Hail | 1.00 in | — | — | — | — | County |
| 11 Sep 2019 | Hail | 1.00 in | — | — | — | — | County |
| 11 Sep 2019 | Hail | 1.25 in | — | — | — | — | County |
| 11 Sep 2019 | Hail | 1.50 in | — | — | — | — | County |
| 11 Sep 2019 | Hail | 1.00 in | — | — | — | — | County |
| 11 Sep 2019 | Hail | 1.50 in | — | — | — | — | County |
| 11 Sep 2019 | Hail | 1.00 in | — | — | — | — | County |
| 11 Sep 2019 | Hail | 1.50 in | — | — | — | — | County |
| 11 Sep 2019 | Hail | 1.00 in | — | — | — | — | County |
| 10 Sep 2019 | Hail | 1.00 in | — | — | — | — | County |
| 13 Aug 2019 | Hail | 0.88 in | — | — | — | — | County |
| 15 Jul 2019 | Hail | 0.75 in | — | — | — | — | County |
| 7 Jul 2019 | Hail | 0.75 in | — | — | — | — | County |
| 7 Jul 2019 | Hail | 0.75 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.00 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.25 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.00 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.00 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.25 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.25 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.25 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.00 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.75 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.75 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.25 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.75 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 2.50 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 2.00 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.75 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.25 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 2.00 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.00 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.50 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.75 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.00 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.25 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.25 in | — | — | — | — | County |
| 5 Jul 2019 | Hail | 1.00 in | — | — | — | — | County |
| 8 Jun 2019 | Hail | 0.75 in | — | — | — | — | County |
| 8 Jun 2019 | Hail | 1.00 in | — | — | — | — | County |
| 8 Jun 2019 | Hail | 1.00 in | — | — | — | — | County |
| 8 Jun 2019 | Hail | 0.88 in | — | — | — | — | County |
| 14 Aug 2018 | Hail | 1.25 in | — | — | — | — | County |
| 14 Aug 2018 | Hail | 1.25 in | — | — | — | — | County |
| 14 Aug 2018 | Hail | 1.25 in | — | — | — | — | County |
| 14 Aug 2018 | Hail | 1.00 in | — | — | — | — | County |
| 14 Aug 2018 | Hail | 1.25 in | — | — | — | — | County |
| 25 Jul 2018 | Hail | 1.00 in | — | — | — | — | County |
| 19 Jun 2018 | Hail | 1.00 in | — | — | — | — | County |
| 19 Jun 2018 | Hail | 1.00 in | — | — | — | — | County |
| 19 Jun 2018 | Hail | 1.25 in | — | — | — | — | County |
| 19 Jun 2018 | Hail | 1.50 in | — | — | — | — | County |
| 19 Jun 2018 | Hail | 1.25 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.00 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.00 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.75 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.50 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.25 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.75 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.75 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.00 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.00 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.00 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 3.00 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.75 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.00 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.25 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.75 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.50 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.00 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 2.00 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 2.00 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 2.00 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.00 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 2.50 in | — | — | — | — | County |
| 18 Jun 2018 | Hail | 1.50 in | — | — | — | — | County |
| 30 May 2018 | Hail | 1.00 in | — | — | — | — | County |
| 22 May 2018 | Hail | 0.75 in | — | — | — | — | County |
| 22 May 2018 | Hail | 0.75 in | — | — | — | — | County |
| 12 Jul 1996 | Hail | 1.25 in | $1.0M | — | — | — | County |
| 1 Oct 1994 | Hail | 0.75 in | — | — | — | — | County |
| 1 Oct 1994 | Hail | 1.50 in | — | — | — | — | County |
| 1 Oct 1994 | Hail | 1.00 in | — | — | — | — | County |
| 1 Oct 1994 | Hail | 1.75 in | — | — | — | — | County |
| 1 Oct 1994 | Hail | 1.75 in | — | — | — | — | County |
| 17 Sep 1993 | Hail | 0.75 in | $5K | — | — | — | County |
| 17 Sep 1993 | Hail | 0.88 in | — | — | — | — | County |
| 17 Sep 1993 | Hail | 0.75 in | — | — | — | — | County |
| 17 Sep 1993 | Hail | 0.75 in | — | — | — | — | County |
| 20 Jun 1992 | Hail | 0.75 in | — | — | — | — | County |
| 16 Aug 1991 | Hail | 0.75 in | — | — | — | — | County |
| 6 Aug 1991 | Hail | 0.75 in | — | — | — | — | County |
| 22 Jun 1991 | Hail | 1.75 in | — | — | — | — | County |
| 21 Jun 1991 | Hail | 1.00 in | — | — | — | — | County |
| 15 May 1991 | Hail | 0.75 in | — | — | — | — | County |
| 11 Jul 1990 | Hail | 1.00 in | — | — | — | — | County |
| 11 Jul 1990 | Hail | 0.75 in | — | — | — | — | County |
| 11 Jul 1990 | Hail | 1.00 in | — | — | — | — | County |
| 7 Sep 1989 | Hail | 1.75 in | — | — | — | — | County |
| 3 Jun 1989 | Hail | 0.75 in | — | — | — | — | County |
| 25 Apr 1989 | Hail | 1.00 in | — | — | — | — | County |
| 25 Apr 1989 | Hail | 1.00 in | — | — | — | — | County |
| 24 Apr 1989 | Hail | 0.75 in | — | — | — | — | County |
| 24 Apr 1989 | Hail | 0.75 in | — | — | — | — | County |
| 24 Apr 1989 | Hail | 1.75 in | — | — | — | — | County |
| 9 Jun 1988 | Hail | 0.75 in | — | — | — | — | County |
| 9 Aug 1987 | Hail | 0.75 in | — | — | — | — | County |
| 31 Jul 1987 | Hail | 0.75 in | — | — | — | — | County |
| 18 Jun 1987 | Hail | 1.15 in | — | — | — | — | County |
| 17 Jun 1987 | Hail | 0.75 in | — | — | — | — | County |
| 26 May 1987 | Hail | 1.00 in | — | — | — | — | County |
| 2 Aug 1986 | Hail | 1.75 in | — | — | — | 6 | County |
| 2 Aug 1986 | Hail | 1.75 in | — | — | — | 1 | County |
| 2 Aug 1986 | Hail | 0.75 in | — | — | — | — | County |
| 2 Aug 1986 | Hail | 0.75 in | — | — | — | — | County |
| 18 Aug 1983 | Hail | 1.00 in | — | — | — | — | County |
| 18 Aug 1983 | Hail | 2.00 in | — | — | — | — | County |
| 13 Aug 1983 | Hail | 0.75 in | — | — | — | — | County |
| 17 Jul 1983 | Hail | 0.75 in | — | — | — | — | County |
| 7 Jul 1983 | Hail | 2.50 in | — | — | — | — | County |
| 12 Jun 1983 | Hail | 0.75 in | — | — | — | — | County |
| 12 Jun 1983 | Hail | 1.75 in | — | — | — | — | County |
| 12 Jun 1983 | Hail | 0.75 in | — | — | — | — | County |
| 3 May 1983 | Hail | 1.00 in | — | — | — | — | County |
| 22 Aug 1982 | Hail | 1.00 in | — | — | — | — | County |
| 1 Jul 1982 | Hail | 1.25 in | — | — | — | — | County |
| 1 Jul 1982 | Hail | 0.75 in | — | — | — | — | County |
| 30 Jun 1982 | Hail | 0.75 in | — | — | — | — | County |
| 25 Jun 1982 | Hail | 0.75 in | — | — | — | — | County |
| 2 Jun 1982 | Hail | 2.00 in | — | — | — | — | County |
| 6 Aug 1981 | Hail | 0.75 in | — | — | — | — | County |
| 6 Aug 1981 | Hail | 0.75 in | — | — | — | — | County |
| 25 Jun 1981 | Hail | 0.75 in | — | — | — | — | County |
| 25 Jun 1981 | Hail | 1.25 in | — | — | — | — | County |
| 13 Jun 1981 | Hail | 0.75 in | — | — | — | — | County |
| 15 Oct 1980 | Hail | 1.00 in | — | — | — | — | County |
| 18 Aug 1979 | Hail | 1.75 in | — | — | — | — | County |
| 17 Jun 1979 | Hail | 2.75 in | — | — | — | — | County |
| 13 Jun 1977 | Hail | 1.25 in | — | — | — | — | County |
| 13 Jun 1977 | Hail | 2.50 in | — | — | — | — | County |
| 7 Jun 1975 | Hail | 0.75 in | — | — | — | — | County |
| 8 Sep 1973 | Hail | 1.00 in | — | — | — | — | County |
| 8 Sep 1973 | Hail | 1.50 in | — | — | — | — | County |
| 2 Sep 1973 | Hail | 0.75 in | — | — | — | — | County |
| 2 Aug 1973 | Hail | 0.75 in | — | — | — | — | County |
| 1 Jul 1972 | Hail | 0.75 in | — | — | — | — | County |
| 12 Jun 1971 | Hail | 1.00 in | — | — | — | — | County |
| 10 Jun 1969 | Hail | 2.75 in | — | — | — | — | County |
| 10 Jul 1967 | Hail | 1.75 in | — | — | — | — | County |
| 1 Jul 1967 | Hail | 1.00 in | — | — | — | — | County |
| 1 Jul 1967 | Hail | 2.00 in | — | — | — | — | County |
| 1 Jul 1967 | Hail | 0.00 in | — | — | — | — | County |
| 9 Jun 1967 | Hail | 1.00 in | — | — | — | — | County |
| 20 Jul 1966 | Hail | 1.75 in | — | — | — | — | County |
| 21 Jun 1964 | Hail | 1.75 in | — | — | — | — | County |
| 5 Oct 1962 | Hail | 1.75 in | — | — | — | — | County |
| 26 May 1962 | Hail | 0.75 in | — | — | — | — | County |
| 26 May 1962 | Hail | 0.75 in | — | — | — | — | County |
| 25 May 1962 | Hail | 2.75 in | — | — | — | — | County |
Questions and answers
How many hail events has Boulder County had?
356 events in the NCEI Storm Events record between 1950 and 2026. Reporting of hail became far more complete after 1996, so early decades undercount.
When was the last recorded hail event in Boulder County?
10 Aug 2025 (Hail, 0.75 in). Records reach NCEI about 120 days after the month ends.
What was the most damaging hail event recorded in Boulder County?
The hail of 12 Jul 1996, with property damage estimated by NCEI at $1.0M.
How does Boulder County compare with Colorado for hail?
49.0 events per 100 square miles against 14.9 statewide; the county holds 356 of the state's 15,490 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Hail hub and the county page.