| April 1974 | Tornado (F3) | not stated | 1 killed, 26 hurt, $2,500,000 | no account filed |
| April 1996 | Tornado (F3) | Niantic | 29 hurt, $9,000,000 | no account filed |
| April 1996 | Tornado (F1) | Decatur | 9 hurt, $1,500,000 | no account filed |
| August 2003 | Thunderstorm Wind | Warrensburg | 5 hurt | Downburst winds blew through portions of Macon County. In Warrensburg, a large tree was blown down. In downtown Decatur, the winds destroyed several booths at the Decatur Celebration and injured 5 people, none seriously. |
| May 1978 | Tornado (F2) | not stated | 3 hurt, $250,000 | no account filed |
| April 2006 | Tornado (F1) | Elwin | 3 hurt | The tornado snapped power poles and blew down numerous trees along its path. It damaged the roof of several structures and broke a window and signs at a strip mall. Three injuries (direct) were reported due to flying glass. |
| June 1990 | Thunderstorm Wind | not stated | 3 hurt | no account filed |
| March 1976 | Tornado (F4) | not stated | 2 hurt, $2,500,000 | no account filed |
| March 2007 | Tornado (EF0) | Elwin | 1 hurt, $37,000 | The tornado touched down 1/2 mile southwest of the intersection of Elwin Road and Rt. 51 and ended 1/2 mile to the north northeast. The tornado caused damage to a house porch and church chimney as well as numerous trees. A two foot diameter tree fell on three cars causing severe damage. One minor injury occurred to an 18 year old female when she was blown to the ground. Maximum wind speed with the tornado was estimated at 80 MPH. |
| May 2025 | Thunderstorm Wind | (Dec)Decatur Arpt | 1 hurt | A tree was blown onto a house on Bayview Drive. One person sustained a head injury. |
| May 2006 | Lightning | Decatur | 1 hurt | A man was slightly injured by lightning on the east side of Decatur when the car he was riding in was struck. |
| June 1999 | Thunderstorm Wind | Blue Mound | 1 hurt | As a line of severe storms moved through Macon County, four sheds, several garages and a barn were destroyed. Also, numerous trees and power lines were blown down in Niantic, Elwin, and Mt. Zion areas. In Niantic, a live power line fell onto a person causing minor injuries. |
| November 1998 | Thunderstorm Wind | Macon | 1 hurt | As a line of thunderstorms moved through the area a 30 foot travel trailer was tipped over in Macon, injuring one person. The man sustained a dislocated hip. Then 4 miles east of Macon, a large tree was blown onto a house causing moderate damage. Also, two machine sheds sustained damage in the area. In Forsyth, a garage and an above ground swimming pool sustained damage from a fallen tree. No damage estimate was available. |
| August 2014 | Flash Flood | Warrensburg | $20,000,000 | A severe thunderstorm produced 2.00 to 3.00 of rain within one hour in parts of central Macon County, including the cities of Decatur and Mt. Zion. The flash flooding resulted in the closure of numerous streets and viaducts in Decatur, as well as basement flooding to numerous homes and businesses. The flash flooding also impacted several rural roads from Harristown through Decatur to Mt. Zion. The flooding subsided by late evening. |
| November 1975 | Tornado (F2) | not stated | $2,500,000 | no account filed |
| April 1974 | Tornado (F3) | not stated | $2,500,000 | no account filed |
| May 1995 | Thunderstorm Wind | Forsyth | $1,400,000 | A downburst occurred in Forsyth damaging 43 homes (one home was destroyed, three homes had major damage, and four businesses had minor damage). There was also some minor damage to a public park. Damage was estimated around $1,400,000. |
| August 2025 | Thunderstorm Wind | Maroa | $1,000,000 | Extensive wind damage occurred across Maroa. The roof of a township building on South Wood Street was blown off and approximately 100 trees were blown down across town. A camper was blown over and crops near town were flattened. In addition, a solar farm on the south side of Maroa was destroyed. |
| May 2013 | Tornado (EF1) | Decatur | $500,000 | A tornado touched down at 10:03 PM CDT on the northwest side of Decatur near the intersection of Division Street and Summit Avenue. The tornado tracked northeastward through Graceland Cemetery, across Oakland Avenue, and just south of the Decatur Memorial Hospital before dissipating near East Maywood Court at 10:07 PM CDT. Numerous trees and tree branches were blown down along the path of the tornado, with the most significant tree damage occurring in Graceland Cemetery. The Plaza TV shop on Oakland Avenue lost its roof and suffered broken windows and siding damage. Other minor roofing damage occurred along the path of the tornado, with numerous trees and tree branches knocked down for several blocks south of the tornado as well. No injuries were reported. |
| June 1998 | Thunderstorm Wind | Countywide | $500,000 | As the bow echo moved through Macon County, the Maroa area sustained considerable damage. A high-tension transmission line was blown down across US 51. Eight structures which carried the line were damaged and a nearby barn and shed were destroyed. No injuries were reported. |
| December 2015 | Flood | Prairie Hall | $400,000 | An extended period of heavy rain during the late evening of December 26th in Macon County combined with an already saturated ground to produce flash flooding. Rainfall amounts ranged from 3.00 to 3.50 inches in less than six hours, with the heaviest rain in the southern half of the county. Most rural roads and state highways were flooded and impassable. Locations from Blue Mound through Macon toward Dalton City and south toward the county line with Christian and Shelby County were the most impacted. The flooding continued through all of December 27th. Additional rainfall of 2.30 to 2.70 from December 28th into the 29th aggravated the flooding situation significantly, and spread into the central part of the county, resulting in basement flooding in many parts of Decatur. Nearly every road between State Route 48 and 121 in southern Macon County was flooded for about three days. The flood water finally subsided by the afternoon of December 30th. |
| December 2018 | Tornado (EF1) | Blackland | $325,000 | A tornado touched down 3.2 miles north-northwest of Blue Mound at 5:53 PM CST. The tornado pushed a manufactured home off of its foundation on Zion Chapel Road as it moved to the north-northeast. Several outbuildings were destroyed by the tornado about 1-2 miles northeast of the house damage. Numerous trees were snapped before the tornado dissipated after crossing the Sangamon River near the Lincoln Trail Homestead State Park about 3.3 miles south-southwest of Harristown at 5:59 PM CST. |
| February 1996 | Thunderstorm Wind | Decatur | $250,000 | no account filed |
| November 1984 | Tornado (F0) | not stated | $250,000 | no account filed |
| April 1963 | Tornado (F3) | not stated | $250,000 | no account filed |
| April 1963 | Tornado (F3) | not stated | $250,000 | no account filed |
| May 2013 | Thunderstorm Wind | Argenta | $213,000 | The roof of a house was severely damaged in Argenta. A large tree fell on a house and several other trees were damaged as well. |
| May 2011 | Tornado (EF1) | Sangamon | $165,000 | A tornado touched down in eastern Macon County about 6 miles east-northeast of Decatur at 7:35 AM CDT. The tornado travelled 1 mile to the northeast, damaging grain bins and outbuildings before lifting at 7:37 AM CDT. |
| December 2018 | Tornado (EF1) | Maroa | $150,000 | A tornado touched down a half mile east of IL Highway 51 along East School Road about 2.2 miles south of Maroa at 6:31 PM CST. The tornado destroyed a large outbuilding and snapped off many trees in that area, then moved to the northeast, causing periodic tree damage and some home roofing damage before dissipating as it reached the intersection of East Duroc Road and Sawyer Road 1.4 miles southeast of Maroa at 6:33 PM CST. |
| July 2016 | Thunderstorm Wind | Decatur | $140,000 | Twenty five trees and hundreds of large tree branches were blown down across the city of Decatur. |
| May 1995 | Thunderstorm Wind | Decatur | $135,000 | A Decatur Sanitary District storage building was destroyed by thunderstorm winds. Four detached garages were blown down and three businesses had minor roof damage. Also, numerous trees and power lines were blown down. Damage was estimated around $135,000. |
| July 2020 | Thunderstorm Wind | Decatur | $125,000 | Numerous trees and power lines were blown down throughout Decatur. |
| April 2011 | Thunderstorm Wind | Oakley | $125,000 | Numerous power poles were blown down along County Highway 24 near Oakley. Two grain bins and a large shed were knocked down and the roof of a house was blown off. |
| May 2009 | Thunderstorm Wind | Mt Zion | $110,000 | Damaging winds associated with the rear flank downdraft of a strong thunderstorm created a swath of wind damage across parts of Mt. Zion. Shingle and siding damage occurred to a number of homes in the area. Power poles were broken off, portable sheds and outbuildings were destroyed, and the metal roof of a car wash was peeled back. |
| April 2020 | Thunderstorm Wind | Warrensburg | $100,000 | Several trees were blown down and roof damage occurred. |
| May 2011 | Tornado (EF1) | Oakley | $100,000 | A tornado touched down in eastern Macon County about 1.7 miles east of Oakley at 7:39 AM CDT. The tornado travelled 1.5 miles to the northeast, damaging grain bins and outbuildings before lifting at 7:42 AM CDT. |
| June 2011 | Thunderstorm Wind | Niantic | $95,000 | A large tree was blown onto a trailer, causing significant damage to the trailer. Two small outbuildings were also destroyed. |
| May 2013 | Thunderstorm Wind | Niantic | $90,000 | Numerous power poles and power lines were blown down. The roof of a machine shed was torn off. |
| July 2015 | Thunderstorm Wind | Long Creek | $80,000 | Shingles were blown off several homes, small sheds were damaged, numerous trees were damaged, and power lines were knocked down in Long Creek. |
| July 2010 | Flash Flood | Niantic | $75,000 | A thunderstorm produced a heavy downpour with more than 1.50 of rain in 30 minutes across central Macon County, including the city of Decatur. Numerous streets were flooded and the roof of a food pantry collapsed, which damaged the contents of the building. |
| October 2010 | Thunderstorm Wind | Decatur | $75,000 | An outbuilding roof was peeled half way off and the west wall of a church was pushed in and damaged at 2954 West Ash Avenue. |
| December 2015 | Thunderstorm Wind | Oakley | $65,000 | Shingles were blown off the roof of a house and two sheds were knocked down. |
| June 2019 | Thunderstorm Wind | Casner | $60,000 | Twelve power poles were blown down along US-36 between Shaw Road and Coffee Pot Circle. |
| May 2013 | Thunderstorm Wind | Argenta | $60,000 | Outbuildings and grain bins were damaged 2 miles south of Argenta. |
| October 2007 | Thunderstorm Wind | Decatur | $60,000 | Trees were blown down on Lake Shore Drive. A hospital roof was damaged, and debris broke car windows. |
| June 2010 | Thunderstorm Wind | Niantic | $55,000 | A camper and barn were damaged due to strong winds. A few trees were blown down as well. |
| November 2016 | Thunderstorm Wind | Decatur | $50,000 | Numerous tree limbs and power lines were blown down on the south side of Decatur. |
| February 2009 | Lightning | Forsyth | $50,000 | Lightning struck a house on the west side of Forsyth causing a fire, and extensive damage to the home. There were no injuries, although the family dog had to be rescued by fire personnel. |
| April 2011 | Thunderstorm Wind | Decatur | $45,000 | A shed and 2 large trees were blown down. 3 houses and 2 garages suffered minor damage. |
| April 2020 | Thunderstorm Wind | Argenta | $40,000 | Power poles were blown down. |
| April 2020 | Thunderstorm Wind | Maroa | $40,000 | Power poles were blown down. |
| December 2015 | Thunderstorm Wind | Oakley | $40,000 | The roof of a church was partially blown off. |
| April 2011 | Thunderstorm Wind | Elwin | $40,000 | Several large trees were blown down and 3 houses suffered minor damage. |
| August 2009 | Thunderstorm Wind | Decatur | $40,000 | Numerous trees and power lines were blown down across Decatur. |
| December 2008 | Thunderstorm Wind | Mt Zion | $40,000 | A pole barn was blown down. |
| April 2020 | Thunderstorm Wind | Emery | $35,000 | The Topflight Grain Elevator was damaged between Maroa and Forsyth. |
| August 2014 | Thunderstorm Wind | Decatur | $35,000 | Several trees and power lines were blown down across Decatur. |
| May 2013 | Thunderstorm Wind | Forsyth | $35,000 | Windows were blown out at the Best Buy store in Forsyth. A piece of roof was torn off Lowes. |
| July 2018 | Thunderstorm Wind | Decatur | $32,000 | A tree was blown over onto a house. |
| May 2013 | Thunderstorm Wind | Decatur | $30,000 | Multiple tree limbs were blown down on Regal Avenue in Decatur. |
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