June 2022 Weather and Its Impacts on Missouri

Pat Guinan
State Climatologist
University of Missouri Extension

Above average June temperatures were dominant for Missouri, especially after the 10th of the month, Figure 1. Preliminary data indicate a statewide average monthly temperature of 75.2°F, or 2.2 degrees above the baseline average (1901-2000). The warmer than average temperatures followed the trend over the past several years, where only one June since 2005 has been below average, Figure 2. It was also the third warmer than average month for the year, Figure 3.

Drier conditions emerged during June and producers were becoming concerned since critical corn growth stages were approaching and pasture growth was slowing. Monthly rainfall was below average statewide, but variable across Missouri, ranging from 3-5+ inches over much of northern Missouri, and 1-3 inches across much of the rest of the state, according to radar estimates, Figure 4. A sizeable portion of west central and southern Missouri reported less than 50% of normal rainfall for the month. Some counties in far south-central Missouri, bordering Arkansas, reported less than 0.10" for the month, including a CoCoRaHS observer southeast of Gatewood, MO, in Ripley County, who reported 0.00" for all of June.

The statewide average rainfall total was 2.81 inches, 1.81 inches below the baseline average (1901-2000), Figure 5. It was the driest June in Missouri since 2016. June was the second month this year with below average precipitation, Figure 6. Some of the heaviest and lightest June rain gauge totals are listed in Tables 1 and 2.

Highest June 2022 Rainfall (in) - NWS Coop and CoCoRaHS reports
Location*	County	June
Chillicothe 1.5 SE	Livingston	7.78
Liberty 4.0 NNW	Clay	7.38
Rock Port 0.5 E	Atchison	7.36
Sedalia 1.5 SSW	Pettis	7.36
Smithville Lake	Clay	7.09
Gladstone 2.6 N	Clay	7.02
Brookfield 3.7 NNE	Linn	6.84
Purdin 4.3 W	Linn	6.46
Carrollton	Carroll	6.17
Spickard 7 W	Grundy	6.12
Table 1.

Lowest June 2022 Rainfall (in.) - NWS Coop and CoCoRaHS reports
Location*	County	June
Gatewood 5.6 SSE	Ripley	0.00
Alton 1.7 NNW	Oregon	0.09
Round Spring 2 SW	Shannon	0.26
West Plains	Howell	0.33
Summersville 3 E	Shannon	0.35
Eminence 1 N	Shannon	0.37
Houston 5.0 SE	Texas	0.46
Summersville 3.6 S	Texas	0.48
Mountain Grove 2 N	Wright	0.49
Dora 3 SE	Ozark	0.53
Table 2.

Dry June weather resulted in abnormally dry conditions by the end of the month, especially across the southern half of the state, according to the U.S. Drought Monitor, Figure 7. There were a couple areas showing moderate drought in southeastern sections.

According to the Missouri Agricultural Statistics Service, for the week ending June 26, 1% of the corn was silking compared to a 5-year average of 8%. Soybean was 93% planted, compared to a 5-year average of 91%. Topsoil moisture supplies were rated 63% adequate and 32% short, while subsoil moisture was rated at 80% adequate and 16% short. Corn was rated mostly good at 61% and 25% fair, while soybean was reported at 54% good and 35 % fair. Pasture conditions were mostly good at 54%, and 36% fair. Hay supplies and other roughages were reported mostly adequate at 91%, and 8% short. Stock water supplies were reported to be in adequate (90%) or surplus (7%) condition.

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Source: Pat Guinan, 573-882-5908