| May 1968 | Tornado (F1) | not stated | 4 killed, 50 hurt, $2,500,000 | no account filed |
| May 2003 | Tornado (F2) | Hallville | 4 hurt, $9,300,000 | As the first tornado was weakening on the west side of Hallsville another more significant tornado developed on the east side of town. It quickly intensified to F2 intensity, destroying two homes and causing damage to several others. In one home, a family of four sought shelter in the hallway. They were briefly trapped after the walls collapsed around them, but only sustained minor injuries. The tornado maintained its intensity and traveled to the southeast towards the south side of Clinton. As it approached US 51 numerous homes and businesses were severely damaged. Seven businesses were destroyed. The tornado finally weakened and lifted one mile south of Lane. Numerous trees, power lines and power poles were blown down as well. No other injuries were reported. |
| November 1988 | Thunderstorm Wind | not stated | 4 hurt | no account filed |
| August 2014 | Flash Flood | Clinton | $5,000,000 | A severe thunderstorm produced 2.50 to 3.00 of rain within one hour in parts of central DeWitt County, including the city of Clinton. The flash flooding resulted in the closure of numerous streets and viaducts in Clinton, as well as basement flooding to numerous homes and businesses. The flash flooding also impacted several rural roads between Clinton and Weldon Springs State Park. The flooding subsided by late evening. |
| May 1977 | Tornado (F4) | not stated | $2,500,000 | no account filed |
| June 1998 | Thunderstorm Wind | Countywide | $1,000,000 | In DeWitt County, a strong microburst (100 to 110 mph) hit around the Clinton Nuclear Power Plant facility and the adjacent Clinton Lake recreation area. The nuclear plant lost three high voltage transmission lines, though there was no structural damage to the facility. Nearby at the marina, the roof on the west side was blown off and several large boats (not in the water) were blown over. Also, hundreds of trees were blown down, some of which blocked Routes 54 and 10 for a time. No injuries were reported. |
| April 1987 | Tornado (F1) | not stated | $250,000 | no account filed |
| May 1995 | Tornado (F1) | Wapella to | $150,000 | no account filed |
| June 2010 | Tornado (EF0) | Kenney | $90,000 | A tornado crossed into DeWitt County from Logan County 3.2 miles west-southwest of Kenney. A barn was blown down and two machine sheds were damaged. In addition, a trailer was rolled over. The tornado lifted 3.5 miles southeast of Kenney. |
| July 2014 | Thunderstorm Wind | Clinton | $80,000 | Numerous trees and power lines were blown down across Clinton. |
| May 2009 | Thunderstorm Wind | Weldon | $75,000 | Numerous trees were uprooted or snapped off by strong winds across Weldon Springs State Park. |
| May 2018 | Thunderstorm Wind | Waynesville | $70,000 | Several power poles were blown down. |
| May 2015 | Thunderstorm Wind | Clinton | $60,000 | Numerous trees and tree branches were blown down across DeWitt County from Clinton to Farmer City. More than 2000 residents lost power. |
| August 2009 | Thunderstorm Wind | Ospur | $60,000 | Several trees were blown down across the road between Weldon Springs State Park and Lane. A few homes and a shed were also damaged. |
| July 2020 | Thunderstorm Wind | Clinton | $50,000 | Multiple trees were blown down. |
| July 2017 | Thunderstorm Wind | Clinton | $50,000 | Several trees and power lines were blown down across Clinton. |
| October 2009 | Flood | Wapella | $50,000 | Heavy rainfall around 3.00 inches in a 24 hour period, on already saturated ground, caused a portion of Sumpter Road, just south of its intersection with Carle Springs Road, to wash out. Standing water over the road hid the damage to the road. A truck trying to cross the water covered road fell into the hole created by washed out surface. The driver was not injured. |
| June 2014 | Thunderstorm Wind | Fullerton | $40,000 | Trees and power lines were blown down at the intersection of Route 48 and Route 54 southwest of Farmer City. |
| June 2009 | Thunderstorm Wind | Farmer City | $40,000 | Numerous trees and power lines were blown down in Farmer City. |
| June 2009 | Thunderstorm Wind | Clinton | $40,000 | Several trees were blown down. |
| June 2014 | Thunderstorm Wind | Clinton | $35,000 | Power lines were blown down and the Township Shed was damaged off the Route 51 bypass north of Clinton. |
| August 2020 | Thunderstorm Wind | Lane | $25,000 | Two large trees were blown down, one of which fell onto a grain bin. |
| August 2014 | Thunderstorm Wind | Clinton | $25,000 | A few trees and power lines were blown down in Clinton. |
| July 2014 | Thunderstorm Wind | Birkbeck | $25,000 | Several trees and tree branches were blown down. |
| May 2013 | Thunderstorm Wind | Wapella | $25,000 | Power lines were blown down in Wapella. |
| June 2009 | Thunderstorm Wind | Clinton | $25,000 | A portion of a motel roof was blown off. A 10-inch diameter tree was snapped, and a power pole was broken. |
| June 2009 | Thunderstorm Wind | Clinton | $25,000 | Numerous trees were blown down at the Clinton Nuclear Plant. |
| April 1986 | Tornado (F1) | not stated | $25,000 | no account filed |
| June 1981 | Tornado (F1) | not stated | $25,000 | no account filed |
| April 1956 | Tornado (F2) | not stated | $25,000 | no account filed |
| August 1955 | Tornado (F1) | not stated | $25,000 | no account filed |
| June 2011 | Thunderstorm Wind | Farmer City | $22,000 | Numerous trees were blown down in Farmer City. A tree limb fell onto a car, shattering the windshield. |
| April 2020 | Thunderstorm Wind | Kenney | $20,000 | Several trees were blown down. |
| June 2018 | Thunderstorm Wind | Clinton | $20,000 | The roof of a shed was damaged near Adams and Portland in Clinton. Cable wires were blown down on Isabella. |
| April 2017 | Thunderstorm Wind | Wapella | $20,000 | A power pole was snapped and power lines were blown down in Wapella. |
| December 2015 | Thunderstorm Wind | De Witt | $20,000 | A grain bin was thrown into a field. |
| May 2009 | Thunderstorm Wind | Clinton | $20,000 | Numerous 5-inch tree limbs were blown down around Clinton. |
| July 2008 | Lightning | Kenney | $20,000 | Lightning struck the water plant in the village of Kenney destroying a transformer for the water tower's pump. Several electrical devices within the plant were also damaged. There were no injuries. |
| October 2018 | Thunderstorm Wind | Midland City | $15,000 | Numerous tree limbs and power lines were blown down in Midland City. |
| June 2016 | Thunderstorm Wind | Farmer City | $15,000 | Power lines were blown down in Farmer City. |
| July 2016 | Thunderstorm Wind | Waynesville | $15,000 | Several large tree branches were blown down in Waynesville. |
| May 2013 | Thunderstorm Wind | Kenney | $15,000 | Several power lines were blown down around town. A tree fell on a house. |
| June 2011 | Thunderstorm Wind | Rowell | $15,000 | Power lines were blown down south of Kenney. |
| June 2018 | Thunderstorm Wind | Farmer City | $12,000 | A tree was blown onto a house. |
| June 2016 | Thunderstorm Wind | Clinton | $12,000 | A large tree and a few power lines were blown down in Clinton. |
| July 2014 | Thunderstorm Wind | Lane | $11,000 | A large tree and several tree branches were blown down about 7 miles east of Clinton. |
| April 2020 | Thunderstorm Wind | Clinton | $10,000 | A tree was blown onto a trailer. |
| May 2018 | Thunderstorm Wind | Waynesville | $10,000 | Several 6-inch diameter tree limbs were blown down across Thorps Road. |
| March 2009 | Thunderstorm Wind | Clinton | $10,000 | Strong winds ripped the siding off an apartment building. |
| June 2009 | Thunderstorm Wind | Clinton | $10,000 | Several large tree limbs were blown down, causing scattered power outages around Clinton. |
| August 2009 | Tornado (EF0) | Midland City | $10,000 | A tornado developed in an open field about 5.2 miles south-southwest of Waynesville, or about 0.2 mile east of the Logan/DeWitt County line and 1 mile north of Illinois Route 10. The tornado did damage to crops and trees before it dissipated about 3.5 miles south-southeast of Waynesville. |
| May 2013 | Thunderstorm Wind | Wapella | $8,000 | Several tree limbs were blown down in Wapella. |
| August 2009 | Thunderstorm Wind | Clinton | $8,000 | A tree was blown onto Rt 54 near the Clinton Power Plant. Several tree limbs and power lines were knocked down across Clinton. |
| May 2018 | Thunderstorm Wind | Waynesville | $6,000 | A power pole was blown down. |
| June 2015 | Thunderstorm Wind | Jenkins | $6,000 | A power pole was blown down at Green Valley Road south of Tabor Road. |
| July 2009 | Thunderstorm Wind | Clinton | $6,000 | A two-foot diameter tree was blown down across a road in Clinton. Another tree was blown onto power lines. |
| April 2017 | Thunderstorm Wind | Jenkins | $5,000 | Trees were blown down across Seven Hills Road about 2 miles southwest of Clinton. |
| July 2014 | Thunderstorm Wind | Fullerton | $4,000 | Several tree limbs were blown down. |
| May 2011 | Thunderstorm Wind | Clinton | $4,000 | A tree was blown onto a powerline, causing a brief power outage. |
| August 2016 | Thunderstorm Wind | Weldon | $3,000 | A tree was blown down at Route 10 and West Street in Weldon. A tree was also blown down onto Lynn Street. |