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Hail history for O'Fallon, MO

Last hail within 10 milesSep 17, 20261 in (quarter)

Hail days, last 12 months4

Largest hail since 20063 in (tea cup)May 13, 2023

Hail days since 200675

Days with hail 1 inch or larger48

Tornadoes within 10 miles9

Damaging wind reports within 10 miles134

Hail has been reported within 10 miles of O'Fallon on 75 days since 2006. The largest stones measured 3 in (tea cup) on May 13, 2023. Hail is most common here in April and May.

O'Fallon ranks #61 for hail days among the 1,399 U.S. cities of 25,000 to 100,000 people. See the ranking →

Recent hail near O'Fallon

Date	Hail size	Where	Source
Sep 17, 2026	1 in quarter	Saint Paul 1 hail report · closest 3 mi from O'Fallon	NWS storm report (preliminary)
Jun 25, 2026	0.75 in penny	St Peters 1 hail report · closest 6 mi from O'Fallon	NOAA Storm Events
Apr 27, 2026	1.25 in half dollar	O Fallon, Fort Zumwalt, Vandalia Airport 7 hail reports · closest near the center of O'Fallon	NOAA Storm Events
Apr 17, 2026	1 in quarter	Cottleville, Harvester, St Charles 9 hail reports · closest 4 mi from O'Fallon	NOAA Storm Events
May 16, 2025	2.5 in tennis ball	Cottleville, Weldon, Weldon Spg 27 hail reports · closest 1 mi from O'Fallon	NOAA Storm Events
Apr 30, 2025	1 in quarter	Weldon Spg, Dardenne 2 hail reports · closest 3 mi from O'Fallon	NOAA Storm Events
Apr 10, 2025	1 in quarter	Fort Zumwalt, St Peters 2 hail reports · closest 1 mi from O'Fallon	NOAA Storm Events
Mar 14, 2025	1.25 in half dollar	Harvester 1 hail report · closest 7 mi from O'Fallon	NOAA Storm Events

One row per day: the largest hail reported that day within 10 miles, the places and the number of reports.

Hail days near O'Fallon by year

When hail season peaks near O'Fallon

Of the 75 hail days since 2006, most fell in April (24) and May (16).

Largest hail storms near O'Fallon

Apr 28, 2012 · 3 in (tea cup) · Wentzville (9 mi from O'Fallon)

May 13, 2023 · 3 in (tea cup) · Harvester (8 mi from O'Fallon)

National Weather Service description (English): A swath of very large hail fell in eastern St. Charles County. Areas that received large hail includes St. Peters, Harvester and St. Charles, mainly along and east of Jungermann Road. This includes the main street area of St. Charles.

Apr 19, 2011 · 2.75 in (baseball) · Dardenne (5 mi from O'Fallon)

National Weather Service description (English): Numerous reports of large hail ranging from ping pong ball size to baseball size.

Mar 15, 2012 · 2.75 in (baseball) · Dardenne (7 mi from O'Fallon)

National Weather Service description (English): A wide swath of large hail fell from areas along and west of I-64 near Highways N and DD to the east northeast through the cities of Lake St. Louis, Dardenne Prairie, and O'Fallon. The largest hail stones, baseball size, were reported near the intersection of Winghaven Boulevard and I-64. There were numerous reports of one to two inch diameter hail.

May 26, 2024 · 2.75 in (baseball) · St Peters (6 mi from O'Fallon)

National Weather Service description (English): There were numerous reports of 1 to 2 inch hailstones in eastern St. Charles County impacting St. Peters, St. Charles, and Kampsville. The largest reported hailstones were 2 to 2.75 inches in diameter and fell exclusively in St. Charles.

Tornadoes within 10 miles of O'Fallon

Date	Rating	Where	Path
Dec 10, 2021	EF1	Spirit/St Louis 9 mi from O'Fallon	2.4 mi long, 50 yd wide
Dec 10, 2021	EF1	Weldon 9 mi from O'Fallon	6.1 mi long, 50 yd wide
Apr 29, 2017	EF0	Kampville 10 mi from O'Fallon	3.9 mi long, 100 yd wide
Jun 28, 2015	EF2	Peruque 4 mi from O'Fallon	2.3 mi long, 400 yd wide
Sep 9, 2014	EF0	Harvester 7 mi from O'Fallon	1.7 mi long, 25 yd wide
Jun 7, 2014	EF0	Harvester 7 mi from O'Fallon	2.7 mi long, 20 yd wide
May 31, 2013	EF3	Defiance 9 mi from O'Fallon	14.8 mi long, 950 yd wide
Jan 29, 2013	EF0	Chain Of Rocks 9 mi from O'Fallon	1.7 mi long, 30 yd wide
Aug 31, 2012	EF0	Fort Zumwalt 2 mi from O'Fallon	0.4 mi long, 120 yd wide

Damaging thunderstorm winds near O'Fallon

134 reports of damaging thunderstorm wind within 10 miles of O'Fallon since 2006, on 89 days. The strongest measured gust was 71 mph on Jul 23, 2017.

Date	Strongest gust	Where	Source
Sep 17, 2026	damage reported	Saint Paul 1 wind report	NWS storm report (preliminary)
Aug 12, 2026	damage reported	O'Fallon, Saint Paul 3 wind reports	NWS storm report (preliminary)
Jul 4, 2026	damage reported	Weldon Spring, Harvester 4 wind reports	NWS storm report (preliminary)
Jun 25, 2026	60 mph, estimated	Kampville 1 wind report	NOAA Storm Events
Apr 17, 2026	58 mph, estimated	Harvester 1 wind report	NOAA Storm Events
Jul 6, 2025	75 mph, estimated	St Peters, Cottleville 2 wind reports	NOAA Storm Events
Jun 27, 2025	58 mph, estimated	Harvester 1 wind report	NOAA Storm Events
May 16, 2025	64 mph, estimated	Dardenne 1 wind report	NOAA Storm Events
Apr 10, 2025	58 mph, measured	All Saints Vlg 1 wind report	NOAA Storm Events
May 26, 2024	70 mph, estimated	All Saints Vlg 1 wind report	NOAA Storm Events

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 O'Fallon; 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.

Nearby cities

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 O'Fallon.

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