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990
CXUS55 KBYZ 011630
CLMBIL

CLIMATE REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
419 AM MST THU JAN 1 2015

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

...THE BILLINGS MT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1934 TO 2014

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
HIGHEST            60   12/13
LOWEST            -10   12/01
AVG. MAXIMUM     37.6              35.2     2.4
AVG. MINIMUM     22.3              17.8     4.5
MEAN             29.9              26.5     3.4
DAYS MAX >= 90      0
DAYS MAX <= 32     11
DAYS MIN <= 32     25
DAYS MIN <= 0       3

PRECIPITATION (INCHES)
TOTALS           0.67              0.50    0.17
DAYS >= .01         7
DAYS >= .10         4
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.29   12/14 TO 12/15

SNOWFALL (INCHES)
TOTALS            8.4               8.2     0.2
SINCE 7/1        21.6              19.9     1.7
SNOWDEPTH AVG.      1
DAYS >= TRACE      12
DAYS >= 1.0         4
GREATEST
 SNOW DEPTH         5   12/30
 24 HR TOTAL      2.7   MM

DEGREE_DAYS
HEATING TOTAL    1082              1193    -111
 SINCE 7/1       2683              2821    -138
COOLING TOTAL       0                 0       0
 SINCE 1/1        618               636     -18
.................................................

WIND (MPH)
AVERAGE WIND SPEED              12.7
HIGHEST WIND SPEED/DIRECTION    44/240    DATE  12/30
HIGHEST GUST SPEED/DIRECTION    58/300    DATE  12/21

AVERAGE RH (PERCENT)     61

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                0     SNOW                       1
LIGHT SNOW               12     SLEET                      0
FOG                      12     FOG W/VIS <= 1/4 MILE      1
HAZE                      3

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

&&

...DECEMBER 2014 MONTH IN REVIEW FOR BILLINGS...

BELOW IS A SUMMARY OF THE TEMPERATURE...PRECIPITATION...AND WIND
STATISTICS FOR BILLINGS FOR DECEMBER 2014. 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...SNOWFALL...AND TEMPERATURES USE A PERIOD OF RECORD
THAT STARTED IN AUGUST 1934 AT THE BILLINGS AIRPORT. MONTHLY RANKINGS
FOR WIND USE A PERIOD OF RECORD THAT STARTED IN 1984.

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

...BILLINGS MONTHLY PRECIPITATION...

 MONTH   2014 VALUES  NORMALS    DEPARTURE  RANKING

DECEMBER     0.67     0.50       +0.17      32ND WETTEST OUT OF 81 YEARS
                                            (RECORD WETTEST WAS 2.00 IN 1973)
                                            (WETTEST SINCE 1.98 IN 2013)

...BILLINGS DECEMBER 2014 BROKEN OR TIED DAILY PRECIPITATION RECORDS...

0.27 ON DECEMBER 14 (OLD RECORD 0.23 IN 1989)

...BILLINGS MONTHLY SNOWFALL...

 MONTH   2014 VALUES  NORMALS    DEPARTURE  RANKING

DECEMBER      8.4       8.2       +0.2      TIED FOR THE 35TH SNOWIEST OUT OF 81 YEARS
                                            (RECORD SNOWIEST WAS 28.8 IN 1955)
                                            (SNOWIEST SINCE 23.9 IN 2013)

...BILLINGS DECEMBER 2014 BROKEN OR TIED DAILY SNOWFALL RECORDS...

NONE

...BILLINGS AVERAGE TEMPERATURES...

 MONTH   2014 VALUES  NORMALS   DEPARTURE  RANKING

DECEMBER     30.0      26.5      +3.5      TIED FOR THE 32ND WARMEST OUT OF 81 YEARS
                                           (RECORD WARMEST WAS 37.3 IN 1957)
                                           (WARMEST SINCE 30.8 IN 2011)

...BILLINGS AVERAGE HIGH TEMPERATURES...

 MONTH   2014 VALUES  NORMALS   DEPARTURE  RANKING

DECEMBER     37.6      35.2      +2.4      37TH WARMEST OUT OF 81 YEARS
                                           (RECORD WARMEST WAS 48.9 IN 1939)
                                           (WARMEST SINCE 39.2 IN 2011)

...BILLINGS DECEMBER 2014 BROKEN OR TIED WARMEST DAILY HIGH TEMPERATURE RECORDS...

60 ON DECEMBER 13 (OLD RECORD 59 IN 1988)

...BILLINGS DECEMBER 2014 BROKEN OR TIED COLDEST DAILY HIGH TEMPERATURE RECORDS...

NONE

...BILLINGS AVERAGE LOW TEMPERATURES...

 MONTH   2014 VALUES  NORMALS   DEPARTURE  RANKING

DECEMBER     22.3      17.8      +4.5      TIED FOR THE 25TH WARMEST OUT OF 81 YEARS
                                           (RECORD WARMEST WAS 28.0 IN 1957)
                                           (WARMEST SINCE 22.4 IN 2011)

...BILLINGS DECEMBER 2014 BROKEN OR TIED WARMEST DAILY LOW TEMPERATURE RECORDS...

44 ON DECEMBER 12 (OLD RECORD 39 IN 1966)
40 ON DECEMBER 13 (OLD RECORD 39 IN 1966)

...BILLINGS DECEMBER 2014 BROKEN OR TIED COLDEST DAILY LOW TEMPERATURE RECORDS...

NONE

...BILLINGS MONTHLY WIND AVERAGES...

 MONTH   2014 VALUES  NORMALS    DEPARTURE  RANKING

DECEMBER     12.7      12.9       -0.2      26TH LEAST WINDIEST OUT OF 66 YEARS
                                            (RECORD LEAST WINDIEST WAS 10.3 IN 1983)
                                            (LEAST WINDIEST SINCE 11.2 IN 2012)

$$




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