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
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