COMPARATIVE CLIMATE DATA

These data tables of meteorological elements outline the climatic conditions at major weather observing stations in all 50 states, Puerto Rico, and Pacific Islands. The data are from observing sites presently in use or include data from former sites that are comparable in exposure. Stations having less than three years of data for the current operating site are omitted from the tables of observed data. Data in this publication have been extracted from the Normals Means and Extremes table contained in the Local Climatological Data Annual Summary, published for individual stations.

Stations are listed alphabetically by state. The tables are arranged so that values of the same element can be compared for different locations by use of a single table. Some weather stations do not regularly report various elements and will therefore not be listed in the table for that element. Asterisks (*) denote average frequency of occurrence greater than zero, but smaller than one half.

Data Tables

• Observed Data
  
  • Temperature - Highest of Record, Degrees F
  • Temperature - Lowest of Record, Degrees F
  • Mean Number of Days Maximum Temperature 90 Deg. F or Higher
  • Mean Number of Days Minimum Temperature 32 Deg. F or Less
  • Mean Number of Days with Precipitation 0.01 Inch or More
  • Snowfall (Including Ice Pellets and Sleet) - Average Total in Inches
  • Wind - Average Speed (MPH)
  • Wind - Maximum Speed (MPH)
  • Sunshine - Average Percent of Possible
  • Cloudiness - Mean Number of Days (Clear, Partly Cloudy, Cloudy)
  • Average Relative Humidity - Morning (M), Afternoon (A)

  Climatological Normals
  

  • Normal Daily Maximum Temperature, Degrees F
  • Normal Daily Minimum Temperature, Degrees F
  • Normal Daily Mean Temperature, Degrees F
  • Normal Heating Degree Days (July-June) Base 65 Degrees F
  • Normal Cooling Degree Days (Jan-Dec) Base 65 Degrees F
  • Normal Precipitation, Inches

Table Notes

• The following gives a full explanation of all symbols and caveats used to explain the data values in the above data tables.

  I.Observed Data (Monthly and Annual) - These values are the
  means and extremes for the Period of Record (number of
  years) indicated. Period of record are documented in the
  Local Climatological Data annual publications.
  
     A.        Temperature - Highest of Record, Degrees
               Fahrenheit (F)
  
     B.        Temperature - Lowest of Record, Degrees
               Fahrenheit (F)
  
               The annual temperature entry for each station
               represents the highest or lowest observed
               temperature in any month.
  
     C.        Mean Number of Days with Minimum Temperature
               32 Degrees F or less.
  
               The mean number of days with a minimum
               temperature of 32 degrees F or lower indicates
               the frequency of occurrence of days with
               freezing temperatures.
  
     D.        Mean number of Days with Precipitation 0.01
               Inches or More
  
               This table shows mean number of days per month
               with at least 0.01 inch of precipitation. 
               This is the smallest amount of precipitation
               numerically recorded, and includes the liquid
               water equivalent of frozen precipitation.  The
               frequency of days with precipitation should
               not be considered as frequency of cloudy days.
  
     E.        Snowfall (including ICE PELLETS and SLEET) -
               Average Total in Inches.
  
               NOTE:     Beginning in April 1988 HAIL is
                         also included under Snowfall. 
                         Therefore, some stations may
                         show snowfall during the warm
                         months.
  
     F.        Wind - Average Speed (MPH)
  
               The average wind speed is based on the speed
               of the wind regardless of direction.
  
     G.        Wind - Maximum Speed (MPH)
  
               This table expresses both a maximum wind speed
               for the stations and, where available, the
               direction (referenced to true North) from
               which it blew.  Short gusts are listed only
               for stations denoted with a (G).
  
               If the direction is expressed as one of the 16
               compass points (N, NNE, NE, etc.) the maximum
               speed is calculated from the minimum time
               during which one mile of wind passed the
               station.  Note that some stations that report
               short gusts (G) may also use the 16 compass
               point reference for wind direction.
  
               If the direction is expressed numerically, the
               maximum speed is the highest one minute
               average value recorded by the observer. 
               Direction is given in tens of degrees
               clockwise from true North.
  
     H.        Sunshine - Average Percentage of Possible
  
               The total time that sunshine reaches the