The file weather.data.09.09.dat
contains six columns of data.

Each row of data represents an observation taken
at the personal weather station KDENEWAR8, as
reported by the web site "Weather Underground" 
(wunderground.com).

http://www.wunderground.com/weatherstation/WXDailyHistory.asp?ID=KDENEWAR8&day=9&year=2007&month=9

This weather station is located at:

Lat: N 39 ? 43 ' 54 '' ( 39.732 ? )
Lon: W 75 ? 42 ' 40 '' ( -75.711 ? )

This is just off Ebenezer Church Road, in the Drummond Farms neighborhood
near Newark (in the Pike Creek Valley).

Each row contains six numbers, representing:

Hour of day at time of observation  (military time)
Minutes after the hour at time of observation
Temperature in Fahrenheit
Dewpoint in Fahrenheit
Barometric Pressure in Inches of Mercury
Relative Humidity (as a percentage)