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Hail history

Hail in O'Fallon, MO

Since January 2025, radar estimated hail within 5 miles of O'Fallon on 8 days. The biggest estimate: 1 in or larger (quarter), on Thu, Sep 17, 2026. Hail was reported to the National Weather Service within 10 miles on 7 days.

Still loading: radar estimates go back to Wed, Oct 14, 2020, and the earlier years are being added.

Days with hail
12
1 inch or larger
8
days, estimated or reported
Largest radar estimate
1+ in
Thu, Sep 17, 2026
Largest reported
2.5 in
Fri, May 16, 2025
Radar-estimated hail on Thu, Sep 17, 2026 around the place, with the hail reported that day
Thu, Sep 17, 2026: radar-estimated hail around O'Fallon, with the hail reported that day.

By year: 2026: 6 · 2025: 6

Every hail day

  • Thu, Sep 17, 2026

    Radar estimate within 5 miles: 1 in or larger (quarter)

    Reported within 10 miles
    • 1 in, 3 mi NW (1 SW Saint Paul, MO)
  • Sun, Aug 16, 2026

    Radar estimate within 5 miles: 0.75 in or larger (penny)

    No hail reported within 10 miles.

  • Sun, Jul 5, 2026

    Radar estimate within 5 miles: 0.75 in or larger (penny)

    No hail reported within 10 miles.

  • Thu, Jun 25, 2026

    Radar estimate within 5 miles: 0.75 in or larger (penny)

    No hail reported within 10 miles.

  • Mon, Apr 27, 2026

    Radar estimate within 5 miles: 0.75 in or larger (penny)

    Reported within 10 miles
    • 1.25 in, 0 mi S (2 NNE O'Fallon, MO)
    • 1.25 in, 0.7 mi S (1 NNE O'Fallon, MO)
    • 1.25 in, 1.6 mi E (3 NE O'Fallon, MO)
    • 1 in, 2.1 mi SE (2 E O'Fallon, MO)
    • 1 in, 2.6 mi SW (2 WNW O'Fallon, MO)
    • and 2 more
  • Fri, Apr 17, 2026
    Reported within 10 miles
    • 1 in, 6.5 mi SE (2 W Harvester, MO)
    • 1 in, 9.6 mi E (2 SW Saint Charles, MO)
  • Tue, Aug 12, 2025

    Radar estimate within 5 miles: 1 in or larger (quarter)

    No hail reported within 10 miles.

  • Sun, Jul 6, 2025

    Radar estimate within 5 miles: 0.75 in or larger (penny)

    No hail reported within 10 miles.

  • Fri, May 16, 2025

    Radar estimate within 5 miles: 1 in or larger (quarter)

    Reported within 10 miles
    • 1 in, 1.4 mi S (1 NE O'Fallon, MO)
    • 2.5 in, 6.5 mi SE (2 W Harvester, MO)
  • Wed, Apr 30, 2025
    Reported within 10 miles
    • 1 in, 6.9 mi S (3 W Weldon Spring, MO)
  • Thu, Apr 10, 2025
    Reported within 10 miles
    • 1 in, 1.1 mi E (2 NE O'Fallon, MO)
  • Fri, Mar 14, 2025
    Reported within 10 miles
    • 1.25 in, 7.3 mi SE (1 W Harvester, MO)
Check your own address →Weather in O'Fallon now →Get warned before the next storm →

Measured from O'Fallon's centre: radar estimates within 5 miles, reports within 10. Radar estimates come from NOAA's MRMS estimated hail size (MESH), the largest hail the radar estimates aloft on a ~1 km grid. They often run larger than the hail that reached the ground, and they aren't an observation at any address. Reports are what people reported to the National Weather Service. Neither is proof of damage or an official record for an insurance claim.