| January 2002 | Tornado (F2) | Calhoun | $1,000,000 | Top wind speeds in this F-2 tornado were estimated near 120 MPH. The damage path extended from the extreme northwest side of Calhoun to the extreme northeast side of town. A total of about 53 buildings were damaged or destroyed, of which 43 were homes and 10 were businesses. At least one home and one business was destroyed, 5 houses received major damage, and 4 businesses including a church and daycare center received major damage. The business that was destroyed was a TV antenna/satellite service on Kentucky Highway 81 at the northern city limit of Calhoun. Most of the remainder of the structures received minor damage. In addition to the damaged homes and businesses, barns, grain bins, and at least one shed were destroyed. At the city-owned cemetery, 300 to 350 tombstones were overturned, and 50 trees were uprooted. |
| March 1997 | Flash Flood | Calhoun | $800,000 | no account filed |
| June 2020 | Flash Flood | Calhoun | $250,000 | Widespread flash flooding was reported. Several water rescues were conducted, including a few from homes and a few from vehicles. Major roads were closed, including Highways 431, 136, and 81. The majority of emergencies were in the mid-morning hours. Some roads remained closed into the evening. A state of emergency was declared by county government officials. The mesonet site five miles northwest of Calhoun measured 6.74 inches in 48 hours, but much of that fell on the morning of the 28th. |
| December 2013 | Thunderstorm Wind | Calhoun | $80,000 | The roof of the county high school was partially torn off. The gymnasium sustained major water damage. |
| March 2018 | Flood | Calhoun | $50,000 | Moderate flooding continued from late February on the Green River. Flooding began in lower Calhoun. A large portion of Rumsey was flooded. Voluntary evacuations of homes were recommended. Thousands of acres were flooded in the Island, Rumsey, and Jewel City areas, but the cropland was mostly dormant. High water signs were posted on Kentucky Highway 81 near the Green River bridge. Numerous county roads and a few other state roads were closed. The river crested at 31.67 feet early on the 1st. Flood stage is 23 feet. |
| January 2016 | Flood | Calhoun | $20,000 | Moderate flooding continued into January on the Green River. At the Calhoun river gage, the river crested at 28.10 feet on New Years Eve. Flood stage there is 23 feet. Several county roads were closed. Kentucky Highway 85 near Island was closed, along with West Second Street in Rumsey. A couple of streets in Livermore were closed. In Livermore, the water levels came within a couple feet of shutting down the water plant that provides water to the city. A riverfront park in Calhoun was submerged. The Army Corps of Engineers Lock and Dam structure in Calhoun ceased operations after it went under water. Thousands of acres were flooded in the Island, Rumsey, and Jewel City areas. The acreage was mostly dormant cropland, woods, and fields. |
| June 2016 | Thunderstorm Wind | Calhoun | $15,000 | Four power poles were down on Highway 138 West on the outskirts of Rumsey. |
| December 2015 | Flood | Calhoun | $10,000 | Moderate flooding occurred on the Green River. At the Calhoun river gage, the river crested at 28.10 feet on New Years Eve. Flood stage there is 23 feet. Several county roads were closed. Kentucky Highway 85 near Island was closed, along with West Second Street in Rumsey. A couple of streets in Livermore were closed. In Livermore, the water levels came within a couple feet of shutting down the water plant that provides water to the city. A riverfront park in Calhoun was submerged. The Army Corps of Engineers Lock and Dam structure in Calhoun ceased operations after it went under water. Thousands of acres were flooded in the Island, Rumsey, and Jewel City areas. The acreage was mostly dormant cropland, woods, and fields. The flooding continued into January. |
| May 2010 | Flood | Calhoun | $10,000 | Moderate flooding of the Green River occurred in the Calhoun and Rumsey areas. Lower parts of Calhoun began flooding. A large portion of Rumsey was flooded. No mandatory evacuations were ordered, but firefighters went door-to-door in flood-prone neighborhoods in lower Calhoun, Rumsey, and the west side of Livermore. Around 60,000 acres of cropland were flooded in the Island, Rumsey, and Jewel City areas. About half of that land was planted, mostly with corn. |
| July 1996 | Thunderstorm Wind | Calhoun | $10,000 | no account filed |
| June 2006 | Thunderstorm Wind | Calhoun | $8,000 | Widespread tree damage and downed power lines were reported throughout Calhoun and in the Sacramento area. |
| May 2006 | Thunderstorm Wind | Calhoun | $5,000 | Several large tree limbs were down in Livermore and Calhoun, along with some power lines. |
| July 2004 | Thunderstorm Wind | Calhoun | $4,000 | Trees and power lines were blown down in Calhoun and Island. |
| November 2005 | Tornado (F1) | Calhoun | $3,000 | The front porch of a house was blown off. An outbuilding behind the house was moved slightly. Peak winds in this short-lived tornado were estimated near 75 MPH. This tornado was spawned by a supercell thunderstorm with a history of long-track tornadoes across western Kentucky, including the F-4 in neighboring Hopkins County. |
| December 2011 | Flood | Calhoun | $1,000 | Minor flooding of low-lying fields occurred along the Green River. Some river access roads were flooded. |
| January 2022 | Flood | Calhoun | - | Minor flooding occurred on the Green River. Low-lying farmland and fields were flooded, as well as some river access roads and public recreational land. |
| February 2022 | Flood | Calhoun | - | Minor flooding occurred on the Green River, inundating low-lying woods and fields near the river. The river remained above flood stage into March. |
| March 2020 | Flood | Calhoun | - | Minor flooding occurred on the Green River. The impact was mostly on low-lying fields and woods near the river. |
| February 2018 | Flood | Calhoun | - | Moderate flooding developed on the Green River. Flooding began in lower Calhoun. A large portion of Rumsey was flooded. Evacuation of homes became necessary. Thousands of acres were flooded in the Island, Rumsey, and Jewel City areas. The river continued rising into March. |
| February 2016 | Flood | Calhoun | - | Minor flooding occurred along the Green River. Some low-lying fields and woods near the river were underwater. |
| July 2016 | Flood | Calhoun | - | Minor flooding occurred on the Green River. Mainly agricultural bottomland and low-lying areas were affected. |
| August 2015 | Heavy Rain | Calhoun | - | The mesonet site on the Green River near Calhoun measured 1.86 inches within three hours. |
| April 2014 | Flood | Calhoun | - | Minor flooding occurred along the Green River. Low-lying fields and woodlands were underwater. |
| October 2014 | Hail | Calhoun | - | Large hailstones slightly larger than golf balls fell in Calhoun. The hailstones were photographed by at least two weather enthusiasts. |
| February 2014 | Flood | Calhoun | - | Minor flooding occurred along the Green River. Some low-lying fields and woodlands near the river were underwater. |
| August 2013 | Thunderstorm Wind | Calhoun | - | A Kentucky mesonet site measured a wind gust to 58 mph. |
| April 2011 | Heavy Rain | Calhoun | - | A total of 2.20 inches was recorded over the past four hours. |
| April 2011 | Flood | Calhoun | - | Green River floodwaters began to approach a lot of homes and roads. Farmers moved equipment to higher ground. |
| May 2009 | Flood | Calhoun | - | Minor flooding of the Green River occurred. At the Calhoun Lock and Dam gage, where flood stage is 23 feet, the river crested at 24.51 feet on the 13th. Agricultural bottomland and low-lying areas were flooded. |
| March 2009 | Hail | Calhoun | - | Quarter size hail and wind gusts to 55 mph were reported just north of Calhoun. Nickel size hail was reported west of town. |
| May 2009 | Flash Flood | Calhoun | - | Water was over many roads, including Highway 136. |
| February 2008 | Flood | Calhoun | - | At Calhoun, the Green River crested at 24.75 feet on the 14th. Minor flooding of low-lying fields and bottomlands occurred. |
| March 2008 | Flood | Calhoun | - | Moderate flooding of the Green River occurred. At the Calhoun gage, the river crested at 27.50 feet on March 24. Flood stage there is 23 feet, and moderate flooding begins at 26 feet. Thousands of acres were flooded in the Rumsey, Island, and Jewel City areas. Spring planting was not yet underway, so crop losses were negligible. |
| April 2008 | Flood | Calhoun | - | Moderate flooding of the Green River occurred. At the Calhoun gage, the river crested at 28.99 feet on the 10th. Flood stage at Calhoun is 23 feet. Thousands of acres were flooded in the Island, Rumsey, and Jewel City areas. The acreage was primarily farm fields. Since planting season was not underway when flooding began, there was little if any crop damage. |
| April 2006 | Heavy Rain | Calhoun | - | Minor flooding of Highway 136 occurred due to an overflowing creek nearby. |
| June 2006 | Flash Flood | Calhoun | - | Major street flooding occurred throughout Calhoun due to heavy thunderstorm rains. A trained spotter in Sacramento measured 2 inches of rain within an hour. |
| June 2023 | Hail | Calhoun | - | no account filed |
| July 2023 | Hail | Calhoun | - | no account filed |
| January 2022 | Flood | Calhoun | - | no account filed |
| March 2022 | Flood | Calhoun | - | no account filed |
| February 2020 | Flood | Calhoun | - | no account filed |
| April 2019 | Flood | Calhoun | - | no account filed |
| February 2011 | Flood | Calhoun | - | no account filed |
| March 2011 | Flood | Calhoun | - | no account filed |
| February 2008 | Hail | Calhoun | - | no account filed |
| March 2007 | Hail | Calhoun | - | no account filed |
| June 2006 | Hail | Calhoun | - | no account filed |
| June 2004 | Hail | Calhoun | - | no account filed |
| June 2004 | Funnel Cloud | Calhoun | - | no account filed |
| May 2002 | Hail | Calhoun | - | no account filed |
| September 1998 | Hail | Calhoun | - | no account filed |
| March 1997 | Flash Flood | Calhoun | - | no account filed |
| April 1996 | Flash Flood | Calhoun | - | no account filed |