Preliminary data indicates that the statewide average temperature in June was 73.7°F; this was 1.6°F above the 1981-2010 normal of 72.1°F (Figure 1). June 2017 was the 10th warmest June since statewide records began in 1895.
Delaware’s statewide precipitation for June 2017 averaged 2.28 inches, 1.45 inches below the 1981-2010 mean of 3.73 inches (Figure 2). Seven of the last nine months have seen below normal precipitation values across Delaware.
Statewide Spatial Averages
Data from the Delaware Environmental Observing System (DEOS) shows that temperatures were generally above normal across the State, although some stations actually recorded below normal temperatures for the month (Figure 3). Precipitation was below the long-term mean at a majority of sites statewide, with the largest negative anomalies found in Kent and Sussex counties (Figure 4).