Tornado History Map

St. Clair County, Illinois tornado history

64 tornadoes recorded in or across St. Clair County from 1952 to 2025, coloured by rating on the map.

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Years1950 to 2025
Rating (F or EF scale)

Shows tornadoes that started in, or crossed, the chosen state. To see how many have passed near you, search a town or ZIP code, or tap the map.

Key
  • F0 / EF0 Light damage
  • F1 / EF1 Moderate damage
  • F2 / EF2 Considerable damage
  • F3 / EF3 Severe damage
  • F4 / EF4 Devastating damage
  • F5 / EF5 Incredible damage
  • Unknown Not rated (2007 onwards)

How to read the lines. Each line is one tornado, drawn from where it started to where it ended, coloured and sized by its rating. A dot means the record has no end point. Tap a line for its details, or tap anywhere else to see how many tornadoes have passed nearby. Weaker tornadoes appear as you zoom in. Ratings use the Fujita (F) scale before 1 February 2007 and the Enhanced Fujita (EF) scale from then on.

Tornadoes in St. Clair County

The Storm Prediction Center records 64 tornadoes whose paths touched St. Clair County, Illinois between 1952 and 2025. They killed 33 people and injured 490. The busiest month is May, with 18 tornadoes. The strongest was an F4 on 10 February 1959. The most recent was on 20 April 2025.

  • 64tornadoes
  • 33deaths
  • 490injuries
  • 973per 10,000 sq mi of land

A tornado that crossed several counties counts in each one, so county counts add up to more than the state's.

How strong were the tornadoes in St. Clair County?

RatingTornadoesShare
F0 / EF02336%
F1 / EF12031%
F2 / EF21523%
F3 / EF346%
F4 / EF423%
F5 / EF500%
Unknown rating00%

St. Clair County tornadoes over time

Tornadoes by decade
Bar chart of tornadoes by period. The most is 13 in 1950s.1950s131960s51970s41980s61990s102000s82010s62020s12

The 2020s only run to 2025, so that bar is for a shorter period. The record starts in 1950.

Show the numbers
PeriodCount
1950s13
1960s5
1970s4
1980s6
1990s10
2000s8
2010s6
2020s12
Tornadoes by month
Bar chart of tornadoes by period. The most is 18 in May.Jan0Feb2Mar5Apr17May18Jun9Jul2Aug1Sep2Oct4Nov3Dec1
Show the numbers
PeriodCount
Jan0
Feb2
Mar5
Apr17
May18
Jun9
Jul2
Aug1
Sep2
Oct4
Nov3
Dec1

Records for St. Clair County

Notable tornadoes in St. Clair County

Many of these tornadoes killed or injured people. The numbers are the official record's, and they may be revised.

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