Climatological Report (Monthly)
Issued by NWS

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CXUS55 KTFX 011244
CLMHLN


CLIMATE REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
642 AM MDT SAT OCT 1 2016

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

...THE HELENA MT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 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)
RECORD
 HIGH              99   09/05/1967
 LOW                6   09/24/1926
HIGHEST            92   09/01        77      15       91  09/12
LOWEST             36   09/13        36       0       36  09/17
AVG. MAXIMUM     70.8              72.6    -1.8     74.8
AVG. MINIMUM     45.6              43.1     2.5     45.8
MEAN             58.2              57.8     0.4     60.3
DAYS MAX >= 90      1               1.6    -0.6        1
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               1.6    -1.6        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.66   1882
 MINIMUM         0.00   2012
TOTALS           0.97              1.10   -0.13     2.08
DAYS >= .01         7               6.1     0.9
DAYS >= .10         4               2.8     1.2
DAYS >= .50         0               0.6    -0.6
DAYS >= 1.00        0               0.0     0.0
GREATEST
 24 HR. TOTAL    0.48   09/04 TO 09/05

SNOWFALL (INCHES)
RECORDS
 TOTAL           14.1   5
                        0
                        -26215
 24 HR TOTAL     13.3   09/18/1957 TO 09/19/1957
TOTALS            0.0               1.3    -1.3      0.0
SINCE 7/1         0.0               1.6    -1.6
SNOWDEPTH AVG.      0
DAYS >= TRACE       0               0.7    -0.7
DAYS >= 1.0         0               0.4    -0.4
GREATEST
 SNOW DEPTH         0   MM
 24 HR TOTAL      0.0   09/30 TO 09/30

DEGREE_DAYS
HEATING TOTAL     210               237     -27      157
 SINCE 7/1        254               306     -52      194
COOLING TOTAL      13                23     -10       25
 SINCE 1/1        455               406      49      563
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.1
HIGHEST WIND SPEED/DIRECTION    46/150    DATE  09/01
HIGHEST GUST SPEED/DIRECTION    62/170    DATE  09/01

SKY COVER
AVERAGE SKY COVER           0.40

AVERAGE RH (PERCENT)     54

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN               12     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       5     FOG W/VIS <= 1/4 MILE      0
HAZE                      3

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

&&

Summary...September began and ended with dry conditions and very
warm temperatures (highs in the 80s to lower 90s) for much of North
Central and Southwest Montana. However, a series of weather systems
brought periods of moderate rain and mountain snow with unseasonably
cold temperatures. Many locations had a few days that did not get
warmer than the 30s to lower 40s with 24 hour precipitation totals
of at least 0.50 inches. In between these systems, though,
temperatures generally warmed back above normal. Overall, most areas
had slightly above normal temperatures with above normal
precipitation.

$$



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