November 2015: Very Warm with Near Normal Precipitation Across Delaware

Figure 1. Delaware statewide mean November temperature (°F) 1895-2015. Red line indicates 1981-2010 normal.

Figure 2. Delaware statewide November precipitation (inches) 1895-2015. Red line indicates 1981-2010 normal.

November Temperatures

Preliminary data indicates that the statewide average temperature in November was 51.5°F; this was 3.9°F above the 1981-2010 normal of 47.6°F (Figure 1), making November 2015 the fourth warmest on record since 1895. This November was the warmest since 2003.

November Precipitation

Delaware’s statewide precipitation for November 2015 averaged 3.24 inches, 0.16 inches below the 1981-2010 mean (Figure 2). November 2015 saw no snowfall accumulations anywhere in the State.

Statewide Spatial Averages

Data from the Delaware Environmental Observing System (DEOS) shows that November temperatures were above normal across all of Delaware and Chester County, PA (Figure 3). Several stations in northern New Castle County, DE and Chester County, PA saw anomalies between 4° and 6°F above the 30-year normal for November.

Precipitation was below normal at the majority of locations across the State, with larger negative departures across the northern portion of the region (Figure 4).

Figure 3. November 2015 average temperature departures (°F) from the 1981-2010 mean based upon DEOS station data.

Figure 4. November 2015 precipitation departures (inches) from the 1981-2010 mean based upon DEOS station data.