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

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
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 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
499
CXUS55 KBOU 011349
CLMDEN

DENCLMDEN 000
TTAA00 KBOU 011325


CLIMATE REPORT
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
650 AM MST THU FEB 1 2018

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

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2018

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            68   01/09        76      -8       63  01/30
LOWEST             -4   01/16       -29      25       -7  01/06
AVG. MAXIMUM     49.2              44.0     5.2     42.3
AVG. MINIMUM     20.1              17.4     2.7     17.7
MEAN             34.7              30.7     4.0     30.0
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      3               5.5    -2.5        8
DAYS MIN <= 32     28              29.4    -1.4       30
DAYS MIN <= 0       2               1.7     0.3        2

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.35   1883
 MINIMUM         0.01   1933
                        1934
                        1952
TOTALS           0.54              0.41    0.13     0.54
DAILY AVG.       0.02              0.01    0.01     0.02
DAYS >= .01         5               4.1     0.9        3
DAYS >= .10         2               0.9     1.1        3
DAYS >= .50         0               0.0     0.0        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.30   01/21 TO 01/21

SNOWFALL (INCHES)
TOTALS            6.4               7.0
RECORD
 MAX TOTAL       24.3   1992

DEGREE_DAYS
HEATING TOTAL     932              1063    -131     1075
 SINCE 7/1       3082              3531    -449     3117
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              9.3
RESULTANT WIND SPEED/DIRECTION   4/193
HIGHEST WIND SPEED/DIRECTION    37/260    DATE  01/30
HIGHEST GUST SPEED/DIRECTION    48/270    DATE  01/30

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             21
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     49

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORMS 0
HEAVY RAIN             2    MIXED PRECIP            3
LIGHT RAIN           0    RAIN                    1
LT FREEZING RAIN       0    FREEZING RAIN           0
HEAVY SNOW             3    HAIL                    0
LIGHT SNOW             0    SNOW                    7
FOG                    1    FOG W/VIS <=1/4 MILE    1
HAZE                   4

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

...JANUARY 2018...ABOVE NORMAL TEMPERATURES AND PRECIPITATION

MUCH OF DECEMBER 2017 CONSISTED OF WARMER THAN AVERAGE TEMPERATURES,
ALONG WITH RELATIVELY DRY CONDITIONS. A COOLER PATTERN WOULD BEGIN
TO SETUP NEAR THE END OF DECEMBER, BUT WOULD NOT LAST LONG INTO
JANUARY. AFTER A COOL START TO THE NEW YEAR, TEMPERATURES ROSE TO
WELL ABOVE AVERAGE THROUGH THE 10TH, WITH VERY LITTLE PRECIPITATION
FALLING UNTIL THE 10TH, WHERE WE SAW OUR FIRST DECENT PRECIPITATION
EVENT OF THE MONTH, RECEIVING 0.17" OF PRECIPITATION AND A TRACE OF
SNOWFALL. AFTER THIS EVENT, TEMPERATURES WOULD RETURN CLOSER TO
AVERAGE, BUT STILL SLIGHTLY ABOVE. A WEAK WINTER STORM BROUGHT 0.7"
OF SNOW TO DENVER ON THE 15TH, ALONG WITH COOLER TEMPS, WHICH WOULD
CONTINUE INTO THE 16TH AS WELL. VERY WARM CONDITIONS WOULD RETURN
FOR THE NEXT SEVERAL DAYS FOLLOWING THIS EVENT, AHEAD OF THE BIG
STORM OF THE MONTH ON THE 21ST, WHICH BROUGHT 0.3"OF PRECIPITATION
TO DENVER, RESULTING IN 5.7" OF SNOW. WITH THIS STORM CAME BELOW
NORMAL TEMPERATURES, WHICH WOULD HANG AROUND THROUGH THE 23RD. THE
REST OF THE MONTH WOULD BE CHARACTERIZED BY AVERAGE TO ABOVE AVERAGE
TEMPERATURES WITH NO PRECIPITATION.

TEMPERATURES:

THE AVERAGE TEMPERATURE AT DENVER INTERNATIONAL AIRPORT FOR THE
MONTH WAS 34.7 DEGREES F, WHICH IS 4.0 DEGREES ABOVE NORMAL. THE
WARMEST JANUARY ON RECORD OCCURRED IN 1986 WITH AN AVERAGE MONTHLY
TEMPERATURE OF 40.3 DEGREES F. THE COLDEST JANUARY ON RECORD WAS
OCCURRED IN 1930 WITH A MONTHLY AVERAGE OF 16.8 DEGREES.

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

40.3 1986
40.1 1934
39.6 1953
39.4 1935
38.3 1893
38.2 1911
37.9 1923
37.4 2006
37.3 1981, 1896

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

16.8 1930
18.0 1979
18.1 1875
18.2 1937
19.1 1963
19.4 1949
19.5 1962
20.8 2007
21.7 1886
22.8 1916

PRECIPITATION:

JANUARY 2018 LANDED 0.13 INCHES ABOVE THE MONTHLY AVERAGE COMING IN
AT 0.54 INCHES. AFTER TWO SMALL SYSTEMS ON THE 1ST AND 7TH, 0.17"
FELL ON THE 10TH, BRINGING THE TOTAL TO 0.18". A FEW MORE SMALL
EVENTS WOULD OCCUR IN THE NEXT 10 DAYS, BUT OTHERWISE, RELATIVELY
DRY CONDITIONS DOMINATED THE REGION. A STORM SYSTEM ON THE 21ST
BROUGHT THE HIGHEST DAILY TOTAL OF THE MONTH OF 0.30" TO DENVER,
WHICH BROUGHT THE MONTHLY TOTAL TO 0.54".

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

2.35 INCHES 1883
1.90 INCHES 1877
1.60 INCHES 1891
1.46 INCHES 1949
1.43 INCHES 1948
1.33 INCHES 1962
1.31 INCHES 1973
1.24 INCHES 1959
1.19 INCHES 1992
1.14 INCHES 1989

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

0.01 INCHES 1952, 1934, 1933
0.02 INCHES 1931
0.03 INCHES 2003, 1935, 1914
0.04 INCHES 1904
0.05 INCHES 1998, 1901

SNOWFALL

DENVER RECEIVED 6.4 INCHES OF SNOW IN JANUARY, WHICH IS JUST 0.6
INCHES BELOW AVERAGE. THE MAJORITY OF THAT TOTAL CAME WITH THE ONE
DAY STORM ON THE 21ST, WHERE DENVER RECORDED 5.4 INCHES OF SNOW. THE
REST OF THE MONTH`S SNOW CAME IN THE FORM OF SEVERAL SMALLER EVENTS
THROUGHOUT THE MONTH.

TEN HIGHEST SNOW TOTALS FOR JANUARY IN DENVER WEATHER HISTORY

24.3 INCHES 1992
22.2 INCHES 1949
20.5 INCHES 1883
19.2 INCHES 1948
17.4 INCHES 1959
17.2 INCHES 1962
17.0 INCHES 1987 1891
15.9 INCHES 2007
15.7 INCHES 1951

TEN LOWEST SNOW TOTALS FOR JANUARY IN DENVER WEATHER HISTORY

TRACE       2003 1934
0.1 INCHES  1931
0.2 INCHES  1933
0.3 INCHES  1952
0.4 INCHES  1914
0.8 INCHES  1935
0.9 INCHES  1970
1.0 INCHES  1961 1893

NO THUNDER THUNDER WAS OBSERVED AT DENVER INTERNATIONAL AIRPORT AND
1 DAY WITH DENSE FOG WITH A VISIBILITY AT OR BELOW 1/4 MILE DURING
THE MONTH. THE PEAK WIND GUST OF 48 MPH FROM THE WEST OCCURRED ON
THE 30TH.

$$



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