Climatological Report (Monthly)
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CXUS55 KTFX 011312
CLMHLN


CLIMATE REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
605 AM MST SUN JAN 1 2017

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

...THE HELENA MT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1866 TO 2016

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
HIGHEST            48   12/20        35      13       58  12/09
LOWEST            -28   12/17         9     -37       -3  12/01
AVG. MAXIMUM     24.3              31.7    -7.4     32.3
AVG. MINIMUM      5.8              11.9    -6.1     15.5
MEAN             15.0              21.8    -6.8     23.9
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     21              14.1     6.9       16
DAYS MIN <= 32     31              29.8     1.2       27
DAYS MIN <= 0      11               5.5     5.5        3

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.64   1880
 MINIMUM            T   1935
                        1930
TOTALS           1.28              0.40    0.88     0.74
DAYS >= .01         9               6.6     2.4
DAYS >= .10         4               1.5     2.5
DAYS >= .50         0               0.0     0.0
DAYS >= 1.00        0               0.0     0.0
GREATEST
 24 HR. TOTAL    0.45   12/14 TO 12/15
                        12/15 TO 12/15

SNOWFALL (INCHES)
TOTALS           23.8               7.3    16.5      7.6
SINCE 7/1        25.1              16.1     9.0
SNOWDEPTH AVG.      4
DAYS >= TRACE      18               6.0    12.0
DAYS >= 1.0         5               2.3     2.7
GREATEST
 SNOW DEPTH        10   12/13
 24 HR TOTAL      6.6   MM

DEGREE_DAYS
HEATING TOTAL    1542              1339     203     1266
 SINCE 7/1       3017              3221    -204     2895
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        455               406      49      564
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.2
HIGHEST WIND SPEED/DIRECTION    43/270    DATE  12/21
HIGHEST GUST SPEED/DIRECTION    55/270    DATE  12/21

SKY COVER
AVERAGE SKY COVER           0.60

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                0     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                1     SNOW                       3
LIGHT SNOW               19     SLEET                      0
FOG                       9     FOG W/VIS <= 1/4 MILE      1
HAZE                     12

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

$$




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