Climatological Report (Monthly)
Issued by NWS Billings, MT

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000
CXUS55 KBYZ 011047
CLMMLS


CLIMATE REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
342 AM MST MON JAN 1 2018

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

...THE MILES CITY MT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1937 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
HIGHEST            60   12/12
LOWEST            -27   12/31
AVG. MAXIMUM     32.0              30.9     1.1
AVG. MINIMUM     12.1               9.7     2.4
MEAN             22.1              20.3     1.8
DAYS MAX >= 90      0
DAYS MAX <= 32     11
DAYS MIN <= 32     31
DAYS MIN <= 0       8

PRECIPITATION (INCHES)
TOTALS           0.22              0.29   -0.07
DAYS >= .01         4
DAYS >= .10         0
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.09   12/30 TO 12/30

DEGREE_DAYS
HEATING TOTAL    1324              1385     -61
 SINCE 7/1       3067              3184    -117
COOLING TOTAL       0                 0       0
 SINCE 1/1        985               730     255
.................................................

WIND (MPH)
AVERAGE WIND SPEED              10.7
HIGHEST WIND SPEED/DIRECTION    46/330    DATE  12/05
HIGHEST GUST SPEED/DIRECTION    60/320    DATE  12/05

AVERAGE RH (PERCENT)     68

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                3     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                2     SNOW                       3
LIGHT SNOW               12     SLEET                      0
FOG                       8     FOG W/VIS <= 1/4 MILE      2
HAZE                      2

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

&&

THIS IS AN AUTOMATED...UNATTENDED WEATHER STATION AND MAY
UNDERESTIMATE WINTER PRECIPITATION.

...DECEMBER 2017 MONTH IN REVIEW FOR MILES CITY...

BELOW IS A SUMMARY OF THE TEMPERATURE AND PRECIPITATION
STATISTICS FOR MILES CITY FOR DECEMBER 2017. ALL TEMPERATURES ARE IN
DEGREES FAHRENHEIT AND ALL PRECIPITATION AMOUNTS ARE IN INCHES. NORMALS
ARE 30 YEAR AVERAGES CALCULATED FROM 1981 TO 2010. MONTHLY RANKINGS
FOR PRECIPITATION AND TEMPERATURES USE A PERIOD OF RECORD
THAT STARTED IN FEBRUARY 1937 AT THE MILES CITY AIRPORT.

NUMBERS DENOTED WITH AN * IS MISSING DATA IN THE CALCULATION.

...MILES CITY MONTHLY PRECIPITATION...

 MONTH   2017 VALUES  NORMALS    DEPARTURE  RANKING

DECEMBER     0.22     0.29       -0.07      TIED FOR THE 28TH DRIEST OUT OF 80 YEARS
                                            (RECORD DRIEST WAS 0.02 TIED IN 2015)
                                            (DRIEST SINCE 0.12 IN 2016)

...MILES CITY DECEMBER 2017 BROKEN OR TIED DAILY PRECIPITATION RECORDS...

NONE

NOTE: SINCE THE LATE 1990S...MILES CITY BECAME AN AUTOMATED AND UNATTENDED
WEATHER STATION. PRECIPITATION AMOUNTS IN THE WINTER MAY BE UNDERESTIMATED.

...MILES CITY AVERAGE TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

DECEMBER     22.1      20.3      +1.8      TIED FOR THE 36TH COLDEST OUT OF 80 YEARS
                                           (RECORD COLDEST WAS 0.9 IN 1983)
                                           (COLDEST SINCE 13.9 IN 2016)

...MILES CITY AVERAGE HIGH TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

DECEMBER     32.0      30.9      +1.1      39TH COLDEST OUT OF 80 YEARS
                                           (RECORD COLDEST WAS 9.2 IN 1983)
                                           (COLDEST SINCE 23.4 IN 2016)

...MILES CITY DECEMBER 2017 BROKEN OR TIED WARMEST DAILY HIGH TEMPERATURE RECORDS...

60 ON DECEMBER 12 (OLD RECORD 55 IN 1953)

...MILES CITY DECEMBER 2017 BROKEN OR TIED COLDEST DAILY HIGH TEMPERATURE RECORDS...

-7 ON DECEMBER 31 (OLD RECORD -6 IN 1951)

...MILES CITY AVERAGE LOW TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

DECEMBER     12.1      9.7      +2.4      34TH COLDEST OUT OF 80 YEARS
                                           (RECORD COLDEST WAS -7.5 IN 1983)
                                           (COLDEST SINCE 4.3 IN 2016)

...MILES CITY DECEMBER 2017 BROKEN OR TIED WARMEST DAILY LOW TEMPERATURE RECORDS...

32 ON DECEMBER 13 (TIED RECORD IN 2014)

...MILES CITY DECEMBER 2017 BROKEN OR TIED COLDEST DAILY LOW TEMPERATURE RECORDS...

NONE

$$




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