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St. Charles County, MO hail & severe wind history
328 storm reports on file for St. Charles County between 2010-06-08 and 2026-06-25 — 174 hail and 154 severe thunderstorm wind. That averages 19.3 reports a year, and Apr is the busiest month.
At a glance
- Most recent hail report: Jun 25, 2026 — 0.75" (penny), 1.28 mi ESE of St Peters. Last quarter-size (1") or larger: Apr 27, 2026, 1".
- Hail was reported on 68 days since 2010 — about 4.0 hail days a year.
- Largest hail on record: 4" (grapefruit) on May 11, 2016.
- St. Charles County has more hail reports than 96% of the 115 Missouri counties we cover.
Search every St. Charles County report
Check a single date first, or filter the full record below — pick a year, narrow to a month, or drag the hail-size slider to see only the larger stones (1", quarter size, is the National Weather Service severe threshold).
Loading St. Charles County storm reports…
Worst storm days in St. Charles County
| Date | Reports that day | Largest hail | Peak gust |
|---|---|---|---|
| 2025-05-16 | 31 | 2.5" (tennis ball) | 64 mph |
| 2011-04-19 | 14 | 2.75" (baseball) | 68 mph |
| 2026-04-17 | 14 | 1" (quarter) | 75 mph |
| 2012-04-28 | 13 | 3" (teacup) | 60 mph |
| 2013-04-10 | 9 | 1.75" (golf ball) | 75 mph |
| 2011-04-22 | 8 | 2" (hen egg) | 81 mph |
| 2012-06-04 | 6 | 1.5" (ping pong ball) | 60 mph |
| 2011-05-25 | 6 | 1.5" (ping pong ball) | 64 mph |
| 2026-04-27 | 6 | 1.25" (half dollar) | — |
| 2012-03-02 | 5 | 1.5" (ping pong ball) | — |
Reports by year
Report counts are driven partly by how many people were around to report a storm, so recent years tend to look busier than the early 2010s. Treat the trend as a reporting trend, not purely a weather trend.
Notable large-hail events (2" and up)
| Date | Size | Near | What was reported |
|---|---|---|---|
| 2025-05-16 | 2" hen egg | .54 mi W of Weldon | Hail persisted for 10 or more minutes. |
| 2025-05-16 | 2" hen egg | 0 mi N of Defiance | No narrative filed |
| 2025-05-16 | 2" hen egg | .69 mi S of Weldon Spg | No narrative filed |
| 2025-05-16 | 2" hen egg | .69 mi S of Harvester | No narrative filed |
| 2025-05-16 | 2" hen egg | 1.38 mi S of Cottleville | No narrative filed |
| 2025-05-16 | 2" hen egg | 0 mi N of Cottleville | The photo of the hailstone was received via social media. |
| 2025-05-16 | 2.5" tennis ball | 1.76 mi ESE of Cottleville | No narrative filed |
| 2025-05-16 | 2" hen egg | 0 mi N of Harvester | No narrative filed |
When does hail hit St. Charles County?
Across 17 years of records, April produced the most reports (97), followed by the months either side of it. Monthly totals:
| Month | Reports | Share |
|---|---|---|
| January | 2 | 0.6% |
| February | 5 | 1.5% |
| March | 25 | 7.6% |
| April | 97 | 29.6% |
| May | 78 | 23.8% |
| June | 54 | 16.5% |
| July | 30 | 9.1% |
| August | 21 | 6.4% |
| September | 9 | 2.7% |
| October | 5 | 1.5% |
| November | 1 | 0.3% |
| December | 1 | 0.3% |
Neighboring counties
Counties that share a border with St. Charles County (U.S. Census county adjacency), where we have storm records:
| County | Storm reports | Largest hail |
|---|---|---|
| St. Louis County, MO | 514 | 4.5" |
| Franklin County, MO | 265 | 4" |
| Lincoln County, MO | 116 | 2.5" |
| Warren County, MO | 107 | 4.5" |
See all 115 Missouri counties →
Common questions about hail in St. Charles County
- How often does it hail in St. Charles County?
- Hail was reported on 68 separate days between 2010 and 2026, about 4.0 days a year, with April the busiest month for storm reports. 141 reports were quarter size (1") or larger.
- Does a report here mean hail hit my street?
- Not necessarily. Each report is one observation tied to a nearby landmark, and a county can be large. Storms also go unreported where few people live. Use the date check above to see what was reported nearby, and treat it as a starting point.
- How big is a 1.75" hailstone?
- Forecasters describe hail by everyday objects: 1" is a quarter, 1.75" a golf ball, 2.75" a baseball. The sizes in these reports are estimates made by the person reporting, not lab measurements.
- Where do I get the official record?
- All reports here come from the NOAA NCEI Storm Events Database, which you can search directly. For anything formal, use NOAA’s own records rather than this page.
Look up another place
About these numbers
Every row above is a report filed with the National Weather Service and archived in the NOAA NCEI Storm Events Database (FIPS 29183). Reports are eyewitness, trained-spotter and damage-survey observations, so they cluster near roads and towns and miss storms over empty country. Hail sizes are estimates. Damage figures are preliminary as filed and are never revised in this archive. Use this page for background, not for an insurance claim, a legal filing, or a roof assessment — for those, get the official record from NOAA directly.