Climatological Report (Monthly)
Issued by NWS Missoula, MT

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000
CXUS55 KMSO 011739
CLMMSO


CLIMATE REPORT
NATIONAL WEATHER SERVICE MISSOULA, MT
1039 AM MST MON JAN 1 2018

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

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

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1893 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              60   12/03/1956
                        12/08/1938
                        12/14/1924
 LOW              -30   12/23/1983
                        12/17/1964
HIGHEST            42   12/19        MM      MM       41
                        12/18
LOWEST             -7   12/24        MM      MM      -16
AVG. MAXIMUM     29.0              31.0    -2.0     26.1
AVG. MINIMUM     17.8              16.7     1.1     11.7
MEAN             23.4              23.9    -0.5     18.9
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     18              15.1     2.9       20
DAYS MIN <= 32     31              29.5     1.5       31
DAYS MIN <= 0       1               2.4    -1.4        4

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         7.09   1917
 MINIMUM         0.11   1909
TOTALS           1.62              1.04    0.58     1.49
DAILY AVG.       0.05              0.03    0.02     0.05
DAYS >= .01        16              12.3     3.7       17
DAYS >= .10         6               3.5     2.5        4
DAYS >= .50         1               0.1     0.9        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.64   12/29 TO 12/30              0.44

SNOWFALL (INCHES)
TOTALS           21.2              11.0    10.2     27.8
SINCE 7/1        27.3              17.0    10.3     29.1
DAYS >= TRACE      26               9.8    16.2       26
DAYS >= 1.0         6               3.6     2.4        6
GREATEST
 SNOW DEPTH         9   12/31                         13
                        12/30
 24 HR TOTAL      6.3   MM                           6.6

DEGREE_DAYS
HEATING TOTAL    1284              1276       8
 SINCE 7/1       3174              3172       2
COOLING TOTAL       0                 0       0
 SINCE 1/1        509               332     177
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              3.2
HIGHEST WIND SPEED/DIRECTION    30/100    DATE  12/30
HIGHEST GUST SPEED/DIRECTION    37/100    DATE  12/30

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.80
NUMBER OF DAYS FAIR            3
NUMBER OF DAYS PC              5
NUMBER OF DAYS CLOUDY         23

AVERAGE RH (PERCENT)     83

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                4     FREEZING RAIN              1
LT FREEZING RAIN          2     HAIL                       0
HEAVY SNOW                0     SNOW                       3
LIGHT SNOW               21     SLEET                      1
FOG                      22     FOG W/VIS <= 1/4 MILE      6
HAZE                      8

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

$$



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