Preliminary data indicates that the statewide average temperature in June was 72.2o F, which is 0.4o F below the 1991-2020 mean value of 72.6o F (Figure 1). Although June was slightly cooler than normal compared to the 1991-2020 time period, June 2022 still ranked in the warmest one-third of all Junes since records began in 1895.
Delaware’s statewide precipitation for June 2022 averaged 3.51 inches, 0.58 inches below the 1991-2020 mean of 4.09 inches (Figure 2). This month’s precipitation total was in the “normal” category based upon records dating back to 1895.
Statewide Spatial Anomalies
Data from the Delaware Environmental Observing System (DEOS) show that temperature departures were uniformly negative across the State, with some stations as much as 2.5o F below normal for the month (Figure 3). Precipitation varied across Delaware, but most stations recorded below average rainfall for the month (Figure 4). Kent County saw the largest negative precipitation anomalies of over 2.5 inches in some locations. The positive precipitation departure at Seaford was the result of heavy convective rainfall that occurred with a frontal passage on June 27th.
Temperatures were above normal across the central and southern tier of the United States, with many areas seeing positive departures of 5o – 7o F. The northwest and northeast portions of the country saw near normal temperatures (Figure 5). Precipitation anomalies varied greatly across the country (Figure 6), with dry conditions across the majority of the nation except for Arizona and New Mexico, and the Pacific Northwest. The 500 hPa height pattern for June shows a jet stream ridge located over much of the United States (Figure 7) accounting for the positive temperature anomalies across much of the country (Figure 5).