July 2012 - Warmest on Record

........ JULY 2012...HOTTEST JULY ON RECORD............

 
JULY 2012 WAS THE HOTTEST JULY IN DENVER SINCE WEATHER RECORDS BEGAN
BACK IN 1872. THE MONTH GOT OFF TO A HOT START WITH MUCH ABOVE
NORMAL TEMPERATURES DURING THE FIRST 6 DAYS OF THE MONTH. A RECORD
MAXIMUM TEMPERATURES WAS SET ON THE 2ND. COOLER AND WETTER WEATHER
MOVED INTO THE FRONT RANGE OF COLORADO ON THE 7TH AS THE UPPER RIDGE
OF HIGH PRESSURE MIGRATED FROM THE CENTRAL PLAINS STATES INTO THE
MIDWESTERN STATES...AND A WEAK COLD FRONT MOVED INTO NORTHEASTERN
COLORADO. THIS PATTERN ALSO ALLOWED THE FLOW OF MONSOONAL MOISTURE
TO MOVE INTO COLORADO FROM THE SOUTH AND SOUTHWEST. THIS RESULTED IN
A STRETCH OF BELOW NORMAL TEMPERATURES FROM THE 7TH THROUGH THE
10TH. UPPER LEVEL HIGH PRESSURE THEN REESTABLISHED OVER THE REGION
BRINGING MUCH ABOVE NORMAL TEMPERATURES TO DENVER FROM THE 11TH
THROUGH THE END OF THE MONTH. NO ADDITIONAL RECORDS WERE SET DURING
THIS PERIOD...HOWEVER...THERE WERE 5 DAYS IN WHICH THE MAXIMUM
TEMPERATURE REACHED OR EXCEEDED ONE HUNDRED DEGREES.
 
TEMPERATURES:
 
THE AVERAGE TEMPERATURE FOR THE MONTH WAS 78.9 DEGREES WHICH WAS 4.7
DEGREES ABOVE NORMAL. THIS MAKES JULY OF 2012 THE HOTTEST JULY SINCE
RECORDS BEGAN IN 1872. THERE WERE 27 DAYS IN WHICH THE MAXIMUM
TEMPERATURE EXCEEDED 90 DEGREES...WHICH ESTABLISHES A NEW RECORD.
THE OLD RECORD WAS 26 DAYS BACK IN 2000 AND 2008. THERE WERE ALSO
SEVEN DAYS IN WHICH THE TEMPERATURE REACHED THE CENTURY MARK. THIS
TIES 2005 FOR THE MOST 100 DEGREE DAYS FOR THE MONTH OF JULY. THE
COOLEST TEMPERATURE OF THE MONTH WAS 57 DEGREES WHICH OCCURRED ON
THE MORNING OF THE 26TH. BELOW IS LIST OF TEMPERATURE RECORDS TIED
OR BROKEN DURING THE MONTH.
 
JULY 2012 MONTHLY TEMPERATURE RECORDS:
 
JULY 2012 WAS HOTTEST ON RECORD (AVERAGE TEMPERATURE WAS 78.9 DEGREES)
PREVIOUS RECORD WAS JULY 1934 (AVERAGE TEMPERATURE OF 77.8 DEGREES)
 
THERE WERE 27 DAYS IN WHICH THE TEMPERATURE REACHED OR EXCEEDED 90
DEGREES. THE OLD RECORD WAS 26 DAYS BACK IN 2000 AND 2008.
 
THERE WERE 7 DAYS IN WHICH THE TEMPERATURE REACHED OR EXCEEDED 100
DEGREES. THIS TIES 2005 FOR 100 DEGREE DAYS IN JULY.
 
JULY 2012 DAILY TEMPERATURE RECORDS:
 
 DATE    TEMPERATURE   TYPE OF RECORD     OLD RECORD YEAR SET
JULY 2ND 101 DEGREES   NEW RECORD MAX     100 DEGREES   2007          
 
PRECIPITATION.
 
PRECIPITATION FOR THE MONTH WAS 0.48 INCHES...WHICH IS 1.68 INCHES
BELOW THE NORMAL 0F 2.16 INCHES. MOST OF THIS PRECIPITATION FELL ON THE
6TH AND 7TH WHEN STRONG THUNDERSTORMS WITH HEAVY RAIN MOVED ACROSS THE
FRONT RANGE URBAN CORRIDOR. MOST AREAS RECEIVED ONE TO TWO INCHES OF
RAIN...HOWEVER DENVER INTERNATIONAL AIRPORT ONLY RECORDED 0.38 DURING
THE TWO DAY PERIOD. THERE WERE 12 THUNDERSTORMS OBSERVED AT DENVER
INTERNATIONAL AIRPORT DURING THE MONTH. THERE WAS ONE DAY WITH DENSE
FOG WITH A VISIBILITY AT OR BELOW 1/4 MILE DURING THE MONTH. THE PEAK
WIND OF 45 MPH FROM A NORTHWESTERLY DIRECTION OCCURRED ON THE 15TH.
 
____________________________________________________________________________
 
...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF JULY 2012...
 
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2012
 
WEATHER         OBSERVED          NORMAL DEPART LAST YEAR'S        
                 VALUE   DATE(S) VALUE   FROM    VALUE DATE(S)     
                                          NORMAL                     
................................................................
TEMPERATURE (F)
RECORD
 HIGH             105   07/20/2005                                    
 LOW               42   07/04/1903                                   
                        07/31/1873                                   
HIGHEST           102   07/21        90      12       99 07/31      
                                                          07/04      
LOWEST             57   07/26        42      15       56 07/01      
AVG. MAXIMUM     94.4              89.4     5.0     91.1             
AVG. MINIMUM     63.4              58.9     4.5     60.7              
MEAN             78.9              74.2     4.7     75.9             
DAYS MAX >= 90     27              16.0    11.0       20             
DAYS MAX <= 32      0               0.0     0.0        0             
DAYS MIN <= 32      0               0.0     0.0        0             
DAYS MIN <= 0       0               0.0     0.0        0             
 
PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.41   1965                                         
 MINIMUM         0.01   1901                                          
TOTALS           0.48              2.16   -1.68     3.41             
DAILY AVG.       0.02              0.07   -0.05     0.11             
DAYS >= .01         6               8.3    -2.3       11             
DAYS >= .10         2               4.3    -2.3        7             
DAYS >= .50         0               1.4    -1.4        2             
DAYS >= 1.00        0               0.7    -0.7        2             
GREATEST
 24 HR. TOTAL    0.25   07/06 TO 07/07           07/12 TO 07/13      
                                                          07/31 TO 07/31
                                                          07/31 TO 07/31
SNOWFALL (INCHES)
RECORDS
 TOTAL             0.0                                            
 
DEGREE_DAYS
HEATING TOTAL       0                 6      -6        0             
 SINCE 7/1          0                 6      -6        0             
COOLING TOTAL     438               289     149      346             
 SINCE 1/1        803               444     359      481             
 
FREEZE DATES
RECORD
 EARLIEST     09/08/1962                                             
 LATEST       06/08/2007                                             
EARLIEST                        10/07                                 
LATEST                          05/05                                
..................................................
 
WIND (MPH)
AVERAGE WIND SPEED              9.9
RESULTANT WIND SPEED/DIRECTION   3/179
HIGHEST WIND SPEED/DIRECTION    39/310    DATE 07/15
HIGHEST GUST SPEED/DIRECTION    45/300    DATE 07/15
 
SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM                                     
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            7
NUMBER OF DAYS PC             27
NUMBER OF DAYS CLOUDY          2
 
AVERAGE RH (PERCENT)     39
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             12     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN                7     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       4     FOG W/VIS <= 1/4 MILE      1
HAZE                      2                                          
                                                                   
- INDICATES NEGATIVE NUMBERS.                                     
R INDICATES RECORD WAS SET OR TIED.                               
MM INDICATES DATA IS MISSING.                                      
T INDICATES TRACE AMOUNT.


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