Climatological Report (Monthly)
Issued by NWS Billings, MT

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CXUS55 KBYZ 011232
CLMMLS


CLIMATE REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
528 AM MST TUE JAN 1 2019

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

...THE MILES CITY MT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1937 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
HIGHEST            47   12/19
                        12/18
LOWEST            -10   12/07
AVG. MAXIMUM     34.6              30.9     3.7
AVG. MINIMUM     15.7               9.7     6.0
MEAN             25.1              20.3     4.8
DAYS MAX >= 90      0
DAYS MAX <= 32     14
DAYS MIN <= 32     31
DAYS MIN <= 0       3

PRECIPITATION (INCHES)
TOTALS           0.67              0.29    0.38
DAYS >= .01         7
DAYS >= .10         3
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.33   12/01 TO 12/01

DEGREE_DAYS
HEATING TOTAL    1232              1385    -153
 SINCE 7/1       3107              3184     -77
COOLING TOTAL       0                 0       0
 SINCE 1/1        667               730     -63
.................................................

WIND (MPH)
AVERAGE WIND SPEED              8.7
HIGHEST WIND SPEED/DIRECTION    30/360    DATE  12/30
HIGHEST GUST SPEED/DIRECTION    36/310    DATE  12/19

AVERAGE RH (PERCENT)     79

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                1     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                1     SNOW                       3
LIGHT SNOW                9     SLEET                      0
FOG                      12     FOG W/VIS <= 1/4 MILE      6
HAZE                      1

-  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 2018 MONTH IN REVIEW FOR MILES CITY...

BELOW IS A SUMMARY OF THE TEMPERATURE AND PRECIPITATION
STATISTICS FOR MILES CITY FOR DECEMBER 2018. 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   2018 VALUES  NORMALS    DEPARTURE  RANKING

DECEMBER     0.67     0.29       +0.38      13TH WETTEST OUT OF 81 YEARS
                                            (RECORD WETTEST WAS 1.78 IN 1968)
                                            (WETTEST SINCE 1.01 IN 1982)

...MILES CITY DECEMBER 2018 BROKEN OR TIED DAILY PRECIPITATION RECORDS...

0.33 ON DECEMBER  1 (OLD RECORD 0.20 IN 1947)

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   2018 VALUES  NORMALS   DEPARTURE  RANKING

DECEMBER     25.1      20.3      +4.8      TIED FOR THE 31ST WARMEST OUT OF 81 YEARS
                                           (RECORD WARMEST WAS 33.3 IN 1957)
                                           (WARMEST SINCE 26.4 IN 2015)

...MILES CITY AVERAGE HIGH TEMPERATURES...

 MONTH   2018 VALUES  NORMALS   DEPARTURE  RANKING

DECEMBER     34.5      30.9      +3.6      TIED FOR THE 35TH WARMEST OUT OF 81 YEARS
                                           (RECORD WARMEST WAS 45.0 IN 1957)
                                           (WARMEST SINCE 36.6 IN 2015)

...MILES CITY DECEMBER 2018 BROKEN OR TIED WARMEST DAILY HIGH TEMPERATURE RECORDS...

NONE

...MILES CITY DECEMBER 2018 BROKEN OR TIED COLDEST DAILY HIGH TEMPERATURE RECORDS...

NONE

...MILES CITY AVERAGE LOW TEMPERATURES...

 MONTH   2018 VALUES  NORMALS   DEPARTURE  RANKING

DECEMBER     15.6      9.7      +5.9      25TH WARMEST OUT OF 81 YEARS
                                           (RECORD WARMEST WAS 22.4 IN 1999)
                                           (WARMEST SINCE 16.1 IN 2015)

...MILES CITY DECEMBER 2018 BROKEN OR TIED WARMEST DAILY LOW TEMPERATURE RECORDS...

NONE

...MILES CITY DECEMBER 2018 BROKEN OR TIED COLDEST DAILY LOW TEMPERATURE RECORDS...

NONE

$$




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