WFO Denver/Boulder

DENCLMDEN 000
TTAA00 KBOU 180054

CLIMATE REPORT...CORRECTED
NATIONAL WEATHER SERVICE BOULDER, CO                                 
1130 AM MST THU FEB 03 2006

................................... 

...THE DENVER CLIMATE SUMMARY FOR THE YEAR OF 2005...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1872 TO 2005

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR'S         
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)      
                                          NORMAL                      
................................................................
TEMPERATURE (F)
RECORD
 HIGH             105   07/20/2005                                    
                        08/08/1878                                    
 LOW              -29   01/09/1875                                    
HIGHEST           105   07/20        MM      MM       99 07/13       
LOWEST            -13   12/07        MM      MM      -11 01/05        
AVG. MAXIMUM     65.7              64.3     1.4      64.0             
AVG. MINIMUM     37.2              35.9     1.3      36.7             
MEAN             51.5              50.2     1.3      50.3             
DAYS MAX >= 90     55              33.4    21.6        20             
DAYS MAX <= 32     16              22.1    -6.1        17             
DAYS MIN <= 32    155             156      -1.0       157             
DAYS MIN <= 0       4               9      -5.0         6             

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        23.31 1967                                           
 MINIMUM         7.48 2002                                            
TOTALS          12.80             15.81   -3.01      14.67            
DAILY AVG.       0.04              0.04   -0.01       0.04            
DAYS >= .01        75              88.9    -5.9         83            
DAYS >= .10        34                MM   -13.9         36            
DAYS >= .50         6                MM      MM          7            
DAYS >= 1.00        2                MM      MM          2            
GREATEST
 24 HR. TOTAL    1.27   04/09 TO 04/10               1.62  08/18
 STORM TOTAL       MM                                 MM              
 (MM/DD(HH))       MM                                 MM          
---------------------------------------------------------------------
SNOWFALL (INCHES)
RECORDS
 MAXIMUM         118.7 1908-09
 MINIMUM          20.8 1888-89                                       
 24 HR TOTAL      23.6 1982                                           
 SNOW DEPTH        MM   MM                                            
TOTALS           40.7 (JUL-JUN)     61.7   -21.0    38.0              
 LIQUID EQUIV     3.30               MM      MM      4.12             
SINCE 7/1        14.7               25.6   -10.9    15.4              
 LIQUID 7/1       2.56               MM      MM      1.01             
SNOWDEPTH AVG.      2                MM      MM        2              
DAYS >= TRACE      25                MM      MM       24              
DAYS >= 1.0        13               6.6     6.4       15              
GREATEST
 SNOW DEPTH      10     04/11                          5 11/29         
 24 HR TOTAL      9.9   04/10 TO 04/11                 5.5 04/10 TO 04/11
 STORM TOTAL       MM                                 MM              
 (MM/DD(HH))       MM                                 MM          

DEGREE_DAYS
HEATING TOTAL    5876              6128    -252      5758             
 SINCE 7/1       2236              2486    -250      2367             
COOLING TOTAL     927               696    +231       499             
 SINCE 1/1        927               696    +231       499             

FREEZE DATES
RECORD
 EARLIEST     09/08/1962                                              
 LATEST       06/02/1951                                              
EARLIEST                        10/07                                 
LATEST                          05/12                                 
.................................................................

WIND (MPH)
AVERAGE WIND SPEED             10.0
RESULTANT WIND SPEED/DIRECTION   4/298
HIGHEST WIND SPEED/DIRECTION    54/280    DATE 12/29
HIGHEST GUST SPEED/DIRECTION    64/280    DATE 12/29

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   70
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           71
NUMBER OF DAYS PC            222
NUMBER OF DAYS CLOUDY         72

AVERAGE RH (PERCENT)     53

WEATHER CONDITIONS. NUMBER OF DAYS WITH 
THUNDERSTORM             49     MIXED PRECIP               5
HEAVY RAIN                4     RAIN                      24
LIGHT RAIN               68     FREEZING RAIN              2
LT FREEZING RAIN          5     HAIL                       4
HEAVY SNOW                2     SNOW                      23
LIGHT SNOW               49     SLEET                      2
FOG                      99     FOG W/VIS <= 1/4 MILE     30
HAZE                     24     TORNADO                    1                   
     
-  INDICATES NEGATIVE NUMBERS.                                      
R  INDICATES RECORD WAS SET OR TIED.                                
MM INDICATES DATA IS MISSING.                                       
T  INDICATES TRACE AMOUNT.                                          

$$
                               ...HIGHLIGHTS FOR THE MONTHS OF 2005...

DENVER'S 2005 CAME IN AS A MEDIOCRE YEAR AS FAR AS CLIMATOLOGY IS CONCERNED. 
THE YEAR DID FINISH SLIGHTLY ABOVE NORMAL FOR TEMPERATURE.  THE AVERAGE
TEMPERATURE WAS 65.7 DEGREES...1.4 DEGREES ABOVE THE NORMAL OF 64.3 DEGREES. 
TEMPERATURES RANGED FROM A RECORD TYING 105 DEGREES SET ON JULY 20TH DOWN TO
ANOTHER RECORD -13 SET ON DECEMBER 7TH.   THERE WERE 23 RECORDS EITHER SET OR
TIED DURING THE YEAR.  16 RECORD HIGHS WERE SET OR TIED BUT ONLY 1 RECORD LOW
WAS ESTABLISHED.  ONE NOTEWORTHY RECORD WAS THE INTENSE JULY THAT WAS
EXPERIENCED.  THERE WERE 9 RECORD HIGHS SET...OF WHICH 7 WERE 100 DEGREES OR
HIGHER.  THE ALL TIME DENVER HIGH TEMPERATURE WAS TIED ON JULY 20TH WHEN THE
MERCURY SOARED TO 105 DEGREES.  THIS TIED THE RECORD DENVER HIGH SET WAY BACK
ON AUGUST 8TH 1878.  JULY 2005 BECAME THE 2ND ALL TIME HOTTEST JULY IN DENVER
WEATHER HISTORY BUT IT WAS ALSO THE 3RD DRIEST JULY.

      RECORD       RECORD      RECORD     RECORD     RECORD
      DAILY MAX    DAILY MIN   LOW MAX    HIGH MIN   24 HR PRECIP

JAN       1            0           0         0            0       
FEB       0            0           0         0            0           
MAR       0            0           0         0            0
APR       0            0           0         0            1
MAY       2            0           0         0            0
JUN       0            0           0         1            0
JUL       9            0           0         0            0
AUG       0            0           2         0            0 
SEP       0            0           0         1            0
OCT       2            0           1         0            2
NOV       0            0           0         0            0
DEC       2            1           1         1            0

ANNUAL   16            1           4         3            3            


                    NEW TOP 10 RECORDS

                    2ND DRIEST FEBRUARY
                    2ND LEAST SNOWIEST FEBRUARY
                    4TH WETTEST JUNE
                    2ND HOTTEST JULY
                    3RD DRIEST JULY
                    JULY...MOST 100 DEGREE DAYS (7) IN A MONTH OR SEASON 


PRECIPITATION ON THE OTHER HAND WAS QUITE DISMAL. ONLY A TOTAL OF 12.80 INCHES
OF LIQUID MOISTURE FELL INTO THE RAIN BUCKET.  THIS IS 3.01 INCHES BELOW THE
NORMAL OF 15.81 INCHES.  THERE WERE 9 MONTHS THAT WERE BELOW NORMAL AND ONLY 3
MONTHS THAT ACTUALLY COLLECTED ENOUGH WATER TO BE ABOVE NORMAL.  JUNE 2005
BECAME THE 4TH WETTEST JUNE WITH 3.99 INCHES WHICH WAS 2.43 INCHES ABOVE
NORMAL.  JUNE TALLIED MORE PRECIPITATION THAN JANUARY...FEBRUARY...MARCH...
MAY...JULY...SEPTEMBER...NOVEMBER AND DECEMBER COMBINED.  SNOWFALL ALSO FELL
IN THE BELOW NORMAL RANKS.  THE ACTUAL SNOW SEASON FROM JULY 2004 THROUGH JUNE
2005 ACCUMULATED ONLY 40.7 INCHES WHICH WAS 21.0 INCHES BELOW THE NORMAL OF
61.7 INCHES.  THE CALENDER YEAR SNOWFALL...JANUARY THROUGH DECEMBER 2005 WAS
ALSO DISAPPOINTING WITH ONLY 40.0 INCHES.  AN INTERESTING STATISTIC WAS THE 30
OCCURRENCES OF DENSE FOG (VISIBILITY 1/4 MILE OR LESS) COMPARED TO THE NORMAL
OF ONLY 9 OCCURRENCES.  THERE WERE 49 THUNDERSTORMS OBSERVED COMPARED TO THE
NORM OF 42.  THERE WERE 4 DAYS THAT RECORDED HAIL AND ONE TORNADO WAS OBSERVED
BY DENVER INTERNATIONAL AIRPORT OBSERVERS. IT APPEARED TO BE A WINDY YEAR AS
THE AVERAGE ANNUAL WIND SPEED TALLIED 10.0 MPH WHICH WAS ONLY 1.4 MPH ABOVE
THE AVERAGE.  THE MAXIMUM WIND GUST AT THE AIRPORT WAS 64 MPH FROM A WESTERLY
DIRECTION (280 DEGREES) ON DECEMBER 29TH.  BAROMETRIC PRESSURE THROUGHOUT THE
YEAR RANGED FROM A HIGH OF 30.69 INCHES IN JANUARY DOWN TO 29.20 INCHES IN
APRIL.

BENTON/BURROUGHS 

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.