Sanborn Field - Columbia

93F

34C
Heat Index97.0F
Humidity 44%
Wind Speed 3.9mph
Wind Dir. WSW
Pressure 29.95in.
Soil 2 in.98.7F
Rainfall 0.00in.

June 2018 Weather and Its Impacts on Missouri

Pat Guinan
State Climatologist
University of Missouri Extension

Warm spring weather persisted into June for Missouri with preliminary data indicating a statewide average temperature of 77.4°F, or 4.4 degrees above the long-term average. It was the 8th warmest June on record and warmest June in 65 years (1953), Figure 1. Only four months since January 2017 have been cooler than average, Figure 2, and the May-June average temperature this year was the warmest on record, Figure 3.

Dryness intensified across Missouri during June with most of state reporting below normal rainfall. It was the 3rd consecutive month with below normal precipitation, Figure 4, and driest April thru June period since 2012, Figure 5. The statewide average rainfall total was 3.68 inches, nearly 1-inch below the long-term average. It was the third consecutive June with below average rainfall, Figure 6.

June precipitation was below average, but highly variable across Missouri. With few exceptions, significant precipitation events were scarce during the month. A few small pockets of above normal rainfall are indicated by radar estimates for the month, Figure 7. Some of the heaviest and lightest monthly totals are listed in Tables 1 and 2.

Highest June 2018 Rainfall (NWS Coop and CoCoRaHS reports)
Location County
June 1-30
Rainfall (in.)
Ste. Genevieve 12.5WSW Ste. Genevieve 8.89
Cape Girardeau 1.8SE Cape Girardeau 8.73
Tecumseh 1NE Ozark 8.48
Scott City 0.9E Scott 8.24
Montauk State Park Dent 7.94
Linn 0.8SE Osage 7.84
Table 1.


Lowest June 2018 Rainfall (NWS Coop and CoCoRaHS reports)
Location County
June 1-30
Rainfall (in.)
Emerald Beach 5.5E Stone 0.93
Cassville Barry 1.10
Republic 0.8SE Greene 1.20
Keytesville 0.3E Chariton 1.29
Elm Johnson 1.38
Glasgow Howard 1.43
Table 2.

Widespread significant rain events were minimal during the month, with the biggest 1-day event occurring on June 26th. Figure 8 indicates radar estimated rainfall for the 24-hour period ending 7:00 a.m. CDT, June 27. Numerous locations across central and southeastern Missouri reported more than 1-inch of rain. Localized higher totals, exceeding 3-inches, were found in St. Clair, Benton, Morgan, Miller, Cole, Osage, Boone, Callaway and Montgomery Counties. The highest daily total for the month came from a CoCoRaHS observer in Callaway County, where 5.23 inches was reported 3.2 miles NNW of Kingdom City on June 27. A highly localized heavy rain event impacted Ozark County during the beginning of the month with a NWS cooperative observer reporting 5-inches 1 mile northeast of Tecumseh on June 1.

Missouri drought intensified and expanded during the month with moderate to severe drought impacting much of the northern half of the state as well as moderate drought over far southwestern sections by the last week of June, Figure 9.

According to the Missouri Agricultural Statistics Service, for the week ending July 1, 52% and 53% of the topsoil and subsoil moisture supplies, respectively, were in short to very short condition in the state. Corn and soybean was rated mostly good at 45% and 43%, respectively. Pasture conditions were mostly fair at 42%, but 35% of the state reported poor to very poor pastures. The majority of hay and other roughages remained low, with 74% of the state reporting short to very short supply. Stock water supplies were mostly adequate at 69% but nearly a third of the state, 31%, reported short to very short supply.


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Missouri Average June Temperature 1895-2018

Figure 1.


Missouri Monthly Temperature Departure from Average* January 2017 - June 2018**

Figure 2.


Missouri Average May - June Temperature 1895-2018

Figure 3.


Missouri Monthly Precip. Departure from Average* January 2017 - June 2018**

Figure 4.


Missouri Average Apr-Jun Precipitation (in.) 1895-2018

Figure 5.


Missouri Average June Precipitation 1895-2018*

Figure 6.


Missouri Radar Estimated Rainfall Departure from Normal (in.) June 1-30, 2018

Figure 7.


Missouri Radar Estimated Rainfall for the 24-hr period ending 7:00 a.m. CDT, June 27, 2018

Figure 8.


U.S. Drought Monitor - Missouri, June 26, 2018

Figure 9.



Average Temperature (°F) June 01, 2017 to June 30, 2018

Average Temperature (°F) Departure from 1981-2010 Normals June 01, 2017 to June 30, 2018

Accumulated Precipitation (in) June 01, 2017 to June 30, 2018

Accumulated Precipitation (in): Departure from 1981-2010 Normals June 01, 2017 to June 30, 2018

Source: Pat Guinan, 573-882-5908