WFO Denver/Boulder

CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO                                 
200 PM MST TUE FEB 2 2010

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

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2010...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1872 TO 2010

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR'S         
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)      
                                          NORMAL                      
................................................................
TEMPERATURE (F)
RECORD
 HIGH              76   01/27/1888                                    
 LOW              -29   01/09/1875                                    
HIGHEST            58   01/16        76     -18       71  01/21       
LOWEST            -16   01/07       -29      13      -11  01/27       
AVG. MAXIMUM     43.0              43.2    -0.2     48.2              
AVG. MINIMUM     17.7              15.2     2.5     21.6              
MEAN             30.4              29.2     1.2     34.9              
DAYS MAX >= 90      0               0.0     0.0        0              
DAYS MAX <= 32      2               6.5    -4.5        4              
DAYS MIN <= 32     31              29.8     1.2       26              
DAYS MIN <= 0       3               3.8    -0.8        1              

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.35   1883                                          
 MINIMUM         0.01   1933                                          
                        1934                                          
                        1952                                          
TOTALS           0.07              0.51   -0.44     0.13              
DAILY AVG.       TRACE             0.02   -0.02     0.00              
DAYS >= .01         2               5.8    -3.8        3              
DAYS >= .10         0                MM      MM        0              
DAYS >= .50         0                MM      MM        0              
DAYS >= 1.00        0                MM      MM        0              
GREATEST
 24 HR. TOTAL    0.05  01/06 TO 01/06      0.10  01/25 TO 01/26       

SNOWFALL (INCHES)
RECORDS
 TOTAL           24.3   1992                                          
TOTALS            2.6                7.7   -5.1        4.9              

DEGREE_DAYS
HEATING TOTAL    1069              1111     -42      926              
 SINCE 7/1       3808              3597     211     3293              
COOLING TOTAL       0                 0       0        0              
 SINCE 1/1          0                 0       0        0              

FREEZE DATES
RECORD
 EARLIEST     09/08/1962                                              
 LATEST       06/08/2007                                              
EARLIEST                        10/07                                 
LATEST                          05/05                                 
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.9                    10.7
RESULTANT WIND SPEED/DIRECTION   4/201                 MM
HIGHEST WIND SPEED/DIRECTION    29/060   DATE  01/06   43/350 
HIGHEST GUST SPEED/DIRECTION    35/310   DATE  01/12   49/350

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM                                      

NUMBER OF DAYS FAIR            7                        7
NUMBER OF DAYS PC             22                       23
NUMBER OF DAYS CLOUDY          2                        1

AVERAGE RH (PERCENT)     61

WEATHER CONDITIONS. NUMBER OF DAYS WITH 
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                0     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW                4     SLEET                      0
FOG                       8     FOG W/VIS <= 1/4 MILE      3
HAZE                      3                                           
                                                                    
-  INDICATES NEGATIVE NUMBERS.                                      
R  INDICATES RECORD WAS SET OR TIED.                                
MM INDICATES DATA IS MISSING.                                       
T  INDICATES TRACE AMOUNT.                                          

$$

...DENVER'S JANUARY 2010 WAS VERY DRY AND A LITTLE WARMER THAN NORMAL...


ONLY A TOTAL OF 0.07 INCH OF LIQUID EQUIVALENT WAS COLLECTED DURING
JANUARY 2010 WHICH CAME FROM MELTED SNOWFALL.  THIS IS 0.44 INCH BELOW
THE NORMAL OF 0.51 INCH.  IT ALSO TIED 1961 AS THE 6TH DRIEST DENVER
SINCE DENVER RECORDS KEEPING BEGAN IN 1872.  ONLY 2 DAYS RECORDED
MEASURABLE MOISTURE WITH THE 6TH COLLECTING THE MOST IN A 24 HOUR
PERIOD WITH ONLY 0.05 INCH.  IN THE SNOWFALL DEPARTMENT WHERE
MEASUREMENTS ARE TAKEN NEAR THE DENVER INTERNATIONAL AIRPORT (DIA)...
ONLY 2.6 INCHES OF THE WHITE STUFF WAS RECORDED.  THIS AGAIN WAS BELOW
THE NORMAL OF 7.7 INCHES. FOR THE SEASON...THE GOOD NEWS IS THAT THE
JULY THROUGH JANUARY'S SEASONAL TOTAL IS 40.2 INCHES WHICH IS 6.9 INCHES
ABOVE THE NORM OF 33.3 INCHES FOR THE PERIOD OF TIME.  40.2 INCHES IS FAR
BETTER THAN THE 2008-09 SEASONAL TOTAL THROUGH JANUARY OF A MERE 16.9
INCHES. THERE WERE NO PRECIPITATION RECORDS SET OR TIED DURING THE MONTH.

JANUARY 2009 TEMPERATURE STATISTICS TURNED OUT TO BE A NON-HEADLINE.
THE MONTH FINISHED WITH AN AVERAGE TEMPERATURE OF 30.4 DEGREES WHICH
IS 1.2 DEGREES ABOVE THE 29.2 NORMAL.  TEMPERATURES RANGED FROM A HIGH
OF 58 DEGREES DOWN TO A LOW OF A NON-RECORD -16 DEGREES.  IN FACT...
THERE WERE NO TEMPERATURE RECORDS SET OR TIED DURING JANUARY 2010.  ALL
31 DAYS HAD LOW TEMPERATURES AT OR BELOW FREEZING AND 3 DAYS HAD MINIMUM
TEMPERATURES BELOW ZERO.  TWO DAYS HAD HIGH MERCURY READINGS AT OR BELOW
FREEZING.  JANUARY 2009 SEEMED LIKE A COOL MONTH AS THERE WERE ONLY
7 READINGS THAT REACHED INTO THE FIFTIES.  OBVIOUSLY THE REST OF THE
MONTH ONLY SAW READINGS IN THE 40S OR BELOW.

THREE DAYS HAD DENSE FOG (VISIBILITY OF 1/4 MILE OR LESS) RECORDED AT DIA.
LIGHT FOG WAS OBSERVED ON 8 DAYS. THE PEAK WIND DURING THE MONTH WAS A
FAIRLY LIGHT GUST OF 35 MPH FROM A NORTHWESTERLY DIRECTION (310 DEGREES).

BENTON


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