Delaware Climate Slightly Warm and Dry in June 2014

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Figure 1. Delaware statewide mean June temperature (°F) 1895-2014.
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Figure 2. Delaware statewide June precipitation (inches) 1895-2014.

June Temperatures

Preliminary data indicates that the statewide average temperature in June was 72.8°F; this was 0.7°F above the 1981-2010 normal of 72.1°F (Figure 1). Although slightly above normal, June 2014 was the coolest June across the First State since 2009.

June Precipitation

Delaware’s statewide precipitation for June 2014 averaged 2.28 inches, 1.45 inches below the 1981-2010 mean (Figure 2). Rainfall this June was 7 inches less than June 2013 when 9.57 inches of rain fell across the State.

Statewide Spatial Averages

Data from the Delaware Environmental Observing System (DEOS) shows that the mean June temperature anomalies across Delaware were generally small and varied by location. The greatest negative departures (coolest conditions) were found in coastal Sussex County, while the largest positive temperature departures were found across Chester County, PA (Figure 3).

Rainfall totals were very low across Sussex and Kent counties in Delaware, with totals of less than 1 inch in several locations. Much heavier precipitation fell across New Castle County, DE and Chester County, PA where some stations received more than 5 inches of rainfall during the month (Figure 4).

June 2014 average temperature departures from the 1981-2010 mean based upon DEOS station data.
Figure 3. June 2014 average temperature departures from the 1981-2010 mean based upon DEOS station data.
June 2014 total precipitation based upon DEOS station data.
Figure 4. June 2014 total precipitation based upon DEOS station data.
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