Hail history in Boulder, Colorado
Since 2015, hail was reported within 5 miles of Boulder on 14 days. The largest was 2" (hen egg) on June 18, 2018. The most recent hail report was on May 18, 2025.
10 largest hail days
Open a date to see the map and every report from that storm.
- June 18, 2018
11 reports within 5 miles of Boulder2" (hen egg) - July 5, 2019
8 reports within 5 miles of Boulder1.25" (half dollar) - May 18, 2025
2 reports within 5 miles of Boulder1" (quarter) - June 21, 2023
1 report within 5 miles of Boulder1" (quarter) - June 12, 2023
2 reports within 5 miles of Boulder1" (quarter) - June 25, 2021
1 report within 5 miles of Boulder1" (quarter) - May 18, 2018
2 reports within 5 miles of Boulder1" (quarter) - June 6, 2016
1 report within 5 miles of Boulder1" (quarter) - May 16, 2017
1 report within 5 miles of Boulder0.88" (nickel) - May 30, 2024
1 report within 5 miles of Boulder0.75" (penny)
Hail days by year
Each number is a day when hail was reported within 5 miles of Boulder.
- 20150 days
- 20161 day
- 20172 days
- 20183 days
- 20192 days
- 20200 days
- 20211 day
- 20221 day
- 20232 days
- 20241 day
- 20251 day
- 20260 days
When hail is most common
Hail is most common in May (6 hail days), June (5 hail days) and July (2 hail days).
- January0 days
- February0 days
- March0 days
- April0 days
- May6 days
- June5 days
- July2 days
- August0 days
- September0 days
- October1 day
- November0 days
- December0 days
Where hail was reported
Under 1"1" to 1.74"1.75" (golf ball) and up
Nearby places
These places are within 4 miles of Boulder, so they do not have their own page. Their hail reports are included here.
- Marshall
Reports show where people observed hail, not what fell on a particular roof. This is general information, not insurance, legal or roofing advice.