Climatological Report (Monthly)
Issued by NWS Denver/Boulder, CO

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27

000
CXUS55 KBOU 011436
CLMDEN

CLIMATE REPORT
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
733 AM MST FRI DEC 1 2017

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

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF NOVEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              81   11/27/2017
 LOW              -18   11/29/1877
HIGHEST            81R  11/27        73       8       80  11/16
LOWEST             22   11/15        -6      28       10  11/30
                        11/12
AVG. MAXIMUM     61.1              52.1     9.0     59.9
AVG. MINIMUM     29.4              24.5     4.9     30.4
MEAN             45.3              38.3     7.0     45.1
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               2.3    -2.3        1
DAYS MIN <= 32     22              23.4    -1.4       15
DAYS MIN <= 0       0               0.6    -0.6        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.21   1946
 MINIMUM            T   1899
                        1901
                        1949
TOTALS           0.29              0.61   -0.32     0.52
DAILY AVG.       0.01              0.02   -0.01     0.02
DAYS >= .01         3               4.7    -1.7        2
DAYS >= .10         1               1.6    -0.6        2
DAYS >= .50         0               0.0     0.0        0
DAYS >= 1.00        0               0.0     0.0        0

GREATEST 24 HR. TOTAL    0.23   11/17 TO 11/17

SNOWFALL (INCHES)           T       8.7

SNOWFALL (INCHES) RECORDS TOTAL    42.5    1946

DEGREE_DAYS
HEATING TOTAL     586               801    -215      586
 SINCE 7/1       1171              1382    -211      896
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        881               769     112      878

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

WIND (MPH)
AVERAGE WIND SPEED              9.7
RESULTANT WIND SPEED/DIRECTION   3/214
HIGHEST WIND SPEED/DIRECTION    39/350    DATE  11/18
HIGHEST GUST SPEED/DIRECTION    52/270    DATE  11/01

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            5
NUMBER OF DAYS PC             21
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     50

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORMS             0     MIXED PRECIP             0
HEAVY RAIN                0     RAIN                     0
LIGHT RAIN                1     FREEZING RAIN            0
LT FREEZING RAIN          1     HAIL                     0
HEAVY SNOW                0     SNOW                     0
LIGHT SNOW                3     SLEET                    0
FOG                      10     FOG W/VIS <= 1/4 MILE    4
HAZE                      6

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

...NOVEMBER 2017...DRIER AND MUCH WARMER THAN NORMAL...

AFTER AN OCTOBER WHICH EXPERIENCED A WIDE TEMPERATURE RANGE WITHIN
THE MONTH, NOVEMBER 2017 RECORDED A FAIRLY NARROW RANGE IN
TEMPERATURE DUE TO LACK OF EXTREME COLD. TWO DAILY HIGH TEMPERATURE
RECORDS WERE SET IN NOVEMBER. THE HIGH ON THE 26TH REACHED A RECORD
SETTING 74 DEGREES WITH 81 DEGREES REACHED ON THE 27TH. THE HIGH OF
81 DEGREES ON THE 27TH ALSO ESTABLISHED AN ALL TIME MONTHLY HIGH
TEMPERATURE RECORD FOR NOVEMBER. THE HIGH OF 81 DEGREES ON THE 27TH
EXCEED THE PREVIOUS MONTHLY HIGH TEMPERATURE OF 80 SET ON BOTH THE
6TH OF THE MONTH IN 2006 AND THE 16TH OF THE MONTH IN 2016.

AS FOR PRECIPITATION, NOVEMBER 2017 LANDED SHORT OF THE MONTHLY
AVERAGE AS PREDOMINANT STRONG WEST TO NORTHWESTERLY FLOW ALOFT
PROVIDED FOR FREQUENT BOUTS OF DRY DOWNSLOPE FLOW ALONG THE NORTHERN
FRONT RANGE. A FEW WEAK COLD FRONTS PUSHED THEIR WAY INTO NORTHEAST
COLORADO DURING THE MONTH, HOWEVER WITH LIMITED MOISTURE ASSOCIATED
WITH EACH ONE, ONLY LIGHT PRECIPITATION AMOUNTS WERE RECORDED. A
STRONG AND FAST MOVING DISTURBANCE, WHICH PASSED ACROSS SOUTHERN
WYOMING AND NORTHERN COLORADO LATE IN THE DAY OF THE 17TH, PUSHED
RAIN SHOWERS ONTO THE LOWER ELEVATIONS AND GAVE DENVER THE HIGHEST
PRECIPITATION FOR THE MONTH WITH 0.23 ON THE 17TH.

AS THE THANKSGIVING HOLIDAY APPROACHED, A LARGE RIDGE OF STABLE HIGH
PRESSURE BEGAN TO DEVELOP OVER THE SOUTHWEST UNITED STATES ON THE
21ST. THIS STABLE RIDGE PERSISTED ACROSS THANKSGIVING AND INTO THE
NEXT WEEK WHILE KEEPING THE REGION AND DRY WITH WELL ABOVE AVERAGE
AND EVEN RECORD SETTING TEMPERATURES.

TEMPERATURES:

THE AVERAGE TEMPERATURE AT DENVER INTERNATIONAL AIRPORT FOR THE
MONTH WAS 45.3 DEGREES F, WHICH IS 7.0 DEGREES ABOVE NORMAL. THIS
NOW RANKS AS 10TH WARMEST NOVEMBER`S SINCE TEMPERATURES RECORDS
BEGAN IN 2017 1872. THE WARMEST NOVEMBER ON RECORD OCCURRED IN 1949
WITH AN AVERAGE MONTHLY TEMPERATURE OF 50.9 DEGREES F. THE COLDEST
NOVEMBER ON RECORD WAS OCCURRED IN 1880 WITH A MONTHLY AVERGAE OF
22.0 DEGREES.

TEN WARMEST NOVEMBER`S IN DENVER WEATHER HISTORY SINCE 1872:

50.9 1950
47.2 1999
46.2 1933, 1914
45.9 1981, 1927
45.6 1910, 1917
45.5 1917
45.3 2017

TEN COLDEST NOVEMBER`S IN DENVER WEATHER HISTORY SINCE 1872:

22.0 1880
28.9 2000
29.7 1985
31.5 1929
32.3 1952
32.5 1889
32.8 1972
33.0 1886
33.1 1872
33.3 1979

PRECIPITATION:

PRECIPITATION FOR THE MONTH OF NOVEMBER AT DENVER INTERNATIONAL
AIRPORT WAS 0.29 INCHES, WHICH IS 0.32 INCHES BELOW THE NORMAL OF
0.61 INCHES. THERE WERE 3 DAYS WITH MEASURABLE PRECIPITATION DURING
THE MONTH. 0.23 INCHES OF PRECIPITATION FELL ON THE 17TH, WHICH IS
THE GREATEST DAILY AMOUNT FOR THE MONTH.

TEN WETTEST NOVEMBER`S IN DENVER WEATHER HISTORY SINCE 1872:

3.21 INCHES 1946
2.67 INCHES 1991
2.63 INCHES 1983
2.13 INCHES 2015
1.95 INCHES 1922
1.93 INCHES 1886
1.88 INCHES 1975
1.74 INCHES 1908
1.69 INCHES 1972
1.68 INCHES 1881

TEN DRIEST NOVEMBER`S IN DENVER WEATHER HISTORY SINCE 1872:

TRACE 1949, 1901, 1889
0.01 INCHES 1939
0.03 INCHES 1917
0.04 INCHES 1905, 1904
0.05 INCHES 2003
0.07 INCHES 1903
0.08 INCHES 1920, 1874

NO THUNDER THUNDER WAS OBSERVED AT DENVER INTERNATIONAL AIRPORT AND
4 DAYS WITH DENSE FOG WITH A VISIBILITY AT OR BELOW 1/4 MILE DURING
THE MONTH. THE PEAK WIND GUST OF 52 MPH FROM THE NORTHWEST OCCURRED
ON THE 1ST.

$$



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