Climatological Report (Monthly)
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000
CXUS55 KBYZ 011047
CLMLVM


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

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

...THE LIVINGSTON MT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1948 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
HIGHEST            57   12/12
LOWEST            -22   12/31
AVG. MAXIMUM     35.6              35.5     0.1
AVG. MINIMUM     15.7              16.7    -1.0
MEAN             25.6              26.1    -0.5
DAYS MAX >= 90      0
DAYS MAX <= 32     11
DAYS MIN <= 32     27
DAYS MIN <= 0       7

PRECIPITATION (INCHES)
TOTALS           0.77              0.52    0.25
DAYS >= .01         9
DAYS >= .10         3
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.26   12/16 TO 12/16

DEGREE_DAYS
HEATING TOTAL    1213              1206       7
 SINCE 7/1       3036              3165    -129
COOLING TOTAL       0                 0       0
 SINCE 1/1        397               230     167
.................................................

WIND (MPH)
AVERAGE WIND SPEED              18.0
HIGHEST WIND SPEED/DIRECTION    64/220    DATE  12/18
HIGHEST GUST SPEED/DIRECTION    81/220    DATE  12/18

AVERAGE RH (PERCENT)     65

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                       9
LIGHT SNOW               15     SLEET                      0
FOG                      13     FOG W/VIS <= 1/4 MILE      3
HAZE                      7

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

&&

...DECEMBER 2017 MONTH IN REVIEW FOR LIVINGSTON...

BELOW IS A SUMMARY OF THE TEMPERATURE AND PRECIPITATION
STATISTICS FOR LIVINGSTON 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 JULY 1948 AT OR NEAR THE LIVINGSTON AIRPORT.

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

... MONTHLY PRECIPITATION...

 MONTH   2017 VALUES  NORMALS    DEPARTURE  RANKING

DECEMBER     0.77     0.52       +0.25      12TH WETTEST OUT OF 70 YEARS
                                            (RECORD WETTEST WAS 2.01 IN 1955)
                                            (WETTEST SINCE 0.97 IN 2015)

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

0.26 ON DECEMBER 16 (OLD RECORD 0.22 IN 1981)
0.18 ON DECEMBER 22 (OLD RECORD 0.12 IN 1979)

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

... AVERAGE TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

DECEMBER     25.7      26.1      -0.4      21ST COLDEST OUT OF 70 YEARS
                                           (RECORD COLDEST WAS 12.2 IN 1983)
                                           (COLDEST SINCE 18.8 IN 2016)

... AVERAGE HIGH TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

DECEMBER     35.6      35.5      +0.1      TIED FOR THE 26TH COLDEST OUT OF 70 YEARS
                                           (RECORD COLDEST WAS 21.4 IN 1983)
                                           (COLDEST SINCE 27.2 IN 2016)

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

NONE

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

-6 ON DECEMBER 31 (OLD RECORD -3 IN 1978)

... AVERAGE LOW TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

DECEMBER     15.7      16.7      -1.0      TIED FOR THE 16TH COLDEST OUT OF 70 YEARS
                                           (RECORD COLDEST WAS 2.9 IN 1983)
                                           (COLDEST SINCE 10.3 IN 2016)

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

NONE

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

-22 ON DECEMBER 31 (OLD RECORD -18 IN 1992)

$$





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