July 2022 Weather and Its Impacts on Missouri

Pat Guinan
State Climatologist
University of Missouri Extension

Above average temperatures impacted Missouri in July, especially across the southern half of the state, where dry conditions prevailed. Preliminary data indicated a statewide average temperature of 79.7°F, or 2.0° above the long-term average. It was the hottest July in a decade, Figure 1, and third consecutive warmer than average month for the year, Figure 2. Maximum July temperatures reached the mid 90's or higher for several days in central and southern sections, Figure 3. Many central and southern locations reported triple-digit heat for the month, especially during the latter half of July. Some of the highest maximum temperatures for July are shown in Table 1.

JULY 2022
Station Name* County Highest Max Temp (°F) Date

Anderson 3W McDonald10827
Washburn 5W Barry 10827
Joplin Regional APJasper 10726
Ozark Beach Taney 10727
Carr Creek Shannon 10716
Salem Dent 10725
Stockton Dam Cedar 10627
Neshso Newton 10621
Big Spring Carter 10623
Round Spring 2SW Shannon 10627
*NWS Cooperative Network
Table 1.

Preliminary data indicate the statewide average rainfall total was 3.95 inches, or 0.24 inches above the long-term average, Figure 4. It was the driest July since 2018. Five out the past seven months have been wetter than average this year, Figure 5.

According to radar-estimates, rainfall was highly variable in Missouri, Figure 6. Heaviest rainfall occurred over portions of northern and east central sections where 5-8 inches were common. Additionally, there was corridor, 30-40 miles wide, of heavier rainfall, 5-8 inches, centered on the Cass County and Bates County line eastward to Cole County, near Jefferson City. Driest conditions were found across much of southern Missouri, especially southwestern sections where several locations reported less than 1-inch.

Some of the Heaviest and lightest monthly rain gauge reports are listed in Table 2.

JULY 2022
  Station Name* County Total Rainfall (in.)

HeaviestLadue 1.6 N St. Louis 16.94
  St. Peters 2.2 NE St. Charles 16.50
  West Plains 8.8E Howell 11.25
  Mac Kenzie 0.3 ESE St. Louis City10.97
  Windsor 4.2 SSE Henry 9.38
LightestMount Vernon 0.2 E Lawrence 0.52
  Carthage 1.5 S Jasper 0.53
  Buffalo 2 N Dallas 0.63
  Neosho 3.9 WNW Newton 0.78
  Springfield 5.5 SSWGreene 0.79
*Rain gauges are from the NWS Cooperative Network and CoCoRaHS
Table 2.

A historic extreme rainfall event impacted the St. Louis area on July 26 with some locations in St. Charles and St. Louis Counties reporting more than 1-foot of rain over a 24-hour period, according to radar estimates and rain gauge reports, Figures 7 and 8. The National Weather Service Office in St. Louis wrote an excellent storm analysis on the event titled: July 26th, 2022: Historic Flash Flooding in St. Louis. It was the first time the NWS office in St. Louis issued a flash flood emergency. There were numerous reports of flooded roads, residences and businesses. At least two flood related fatalities were reported.

According to the Missouri Agricultural Statistics Service report from July 31, 2022, 46% of the state reported topsoil moisture supplies in short to very short condition with 54% of the state reporting topsoil moisture in adequate condition. Statewide subsoil condition was reported 48% short to very short, and 52% adequate. Corn, soybean and pasture conditions were reported at 23%, 21%, and 51% in poor to very poor condition, respectively. Corn and soybean were reported in good to excellent condition at 52% and 49%, respectively. Pasture was in good to excellent condition at 22%. The majority of hay and other roughages were adequate to surplus (67%), as well as stock water supplies (70%).

Moderate to extreme drought was impacting much of the southern half of Missouri toward the end of July, according to the U.S. Drought Monitor released on July 28, 2022, Figure 9. Driest conditions were affecting all of southwestern Missouri and several counties on the Missouri-Arkansas border. More than 200 Condition Monitoring Observer Reports were submitted in July according to the National Drought Mitigation Center, Figure 10. Many of the impacts were affecting agriculture with numerous reports of crop, pasture and livestock stress. Hydrological concerns were also emerging with lowering surface water supplies.

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Missouri Average July Temperature 1895-2022

Figure 1.

Missouri Monthly Temperature Departure from Average January - July 2022*

Figure 2.

Columbia, MO July Daily Max/Min Temperature Normal vs 2022

Figure 3.

Missouri Average July Precipitation 1895-2022

Figure 4.

Missouri Monthly Precip. Departure from Average January - July 2022*

Figure 5.

Radar-Estimated July 2022 rainfall (in.)

Figure 6.

Multi-Radar Multi-Sensor (MRMS) Radar-Estimated Rainfall as of 12 p.m., July 26, 2022

Figure 7. Source: National Weather Service - St. Louis, MO

CoCoRaHS rain gauge reports for the 24-hour period ending 7 a.m. CDT, July 26, 2022 - St. Louis County and St. Charles County, Missouri<

Figure 8.

U.S. Drought Monitor - Missouri - July 2022

Figure 9.

Condition Monitoring Observer Reports (CMOR) July 2022

Figure 10.

Average Temperature (°F) July 01, 2022 to July 31, 2022

Average Temperature (°F): Departure from 1991-2020 Normals July 01, 2022 to July 31, 2022

Accumulated Precipitation (in) July 01, 2022 to July 31, 2022

Accumulated Precipitation (in): Departure from 1991-2020 Normals July 01, 2022 to July 31, 2022

Source: Pat Guinan, 573-882-5908