Cool and Dry Conditions Characterize Delaware Climate During November 2013

Figure 1. Delaware statewide mean November temperature (°F) 1895-2013.

Figure 2. Delaware statewide November precipitation (inches) 1895-2013.

November Temperatures

Statewide average temperature in November was 46.5°F according to preliminary data from the National Climatic Data Center (NCDC). This was 1.5°F below the 1981-2010 normal of 48.0°F (Figure 1) and was the fourth month this year with below normal temperatures.

November Precipitation

Statewide precipitation in November averaged 2.65 inches, 0.90 inches below the 1981-2010 mean of 3.55 inches (Figure 2). Much of this month’s precipitation fell on the 27th in association with a strong coastal storm.

Statewide Spatial Averages

Mean monthly temperatures were well below normal across the entire DEOS (deos.udel.edu) network in November, with the largest departures found in southern and coastal Sussex County (Figure 3). Maximum temperatures were uniformly below normal across the entire State (Figure 4), while average minimum temperatures were below normal at all locations except portions of Chester County, PA where they were near normal (Figure 5).

Precipitation was below normal throughout the State, except for stations in the northeastern portion of New Castle County (Figure 6). The largest negative precipitation anomalies were found across inland, southern Delaware and across portions of Chester County, PA.

Figure 3. November 2013 average temperature departures from the 1981-2010 mean based upon DEOS station data.

Figure 4. November 2013 maximum temperature departures from the 1981-2010 mean based upon DEOS station data

Figure 5. November 2013 minimum temperature departures from the 1981-2010 mean based upon DEOS station data

Figure 6. November 2013 precipitation departures from the 1981-2010 mean based upon DEOS station data