Climatological Report (Monthly)
Issued by NWS Missoula, MT

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CXUS55 KMSO 011739
CLMBTM


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

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

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

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1895 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              66   12/27/1917
 LOW              -52   12/23/1983
HIGHEST            42   12/18        MM      MM       42
LOWEST            -27   12/24        MM      MM      -37
AVG. MAXIMUM     29.2              29.5    -0.3     23.9
AVG. MINIMUM      7.7               5.4     2.3     -0.1
MEAN             18.4              17.4     1.0     11.9
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     17              17.3    -0.3       26
DAYS MIN <= 32     31              30.6     0.4       31
DAYS MIN <= 0       7              10.5    -3.5       17

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         1.99   1996
 MINIMUM         0.02   1918
TOTALS           0.53              0.51    0.02     0.44
DAILY AVG.       0.02              0.02    0.00     0.01
DAYS >= .01        10               7.7     2.3        8
DAYS >= .10         1               1.6    -0.6        1
DAYS >= .50         0               0.1    -0.1        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.15   12/22 TO 12/22              0.29
                        12/21 TO 12/22
                        12/22 TO 12/22

DEGREE_DAYS
HEATING TOTAL    1436              1474     -38
 SINCE 7/1       3831              3964    -133
COOLING TOTAL       0                 0       0
 SINCE 1/1        129                81      48
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              4.0
HIGHEST WIND SPEED/DIRECTION    28/310    DATE  12/20
HIGHEST GUST SPEED/DIRECTION    36/300    DATE  12/20

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            9
NUMBER OF DAYS PC             10
NUMBER OF DAYS CLOUDY         12

AVERAGE RH (PERCENT)     71

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                       5
LIGHT SNOW               14     SLEET                      0
FOG                      18     FOG W/VIS <= 1/4 MILE      3
HAZE                     13

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

$$


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