Climatological Report (Monthly)
Issued by NWS

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369
CXUS55 KTFX 010932
CLMHLN


CLIMATE REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
329 AM MDT THU JUN 1 2017

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

...THE HELENA MT CLIMATE SUMMARY FOR THE MONTH OF MAY 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1866 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              95   05/28/1919
 LOW               17   05/02/1954
HIGHEST            87   05/05        70      17       84  05/04
LOWEST             31   05/03        36      -5       31  05/11
AVG. MAXIMUM     70.4              67.1     3.3     65.5
AVG. MINIMUM     42.1              40.8     1.3     41.6
MEAN             56.2              54.0     2.2     53.6
DAYS MAX >= 90      0               0.4    -0.4        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      2               3.0    -1.0        2
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.67   1927
 MINIMUM         0.24   1928
TOTALS           1.39              1.87   -0.48     1.45
DAYS >= .01        11              11.1    -0.1
DAYS >= .10         3               5.1    -2.1
DAYS >= .50         1               0.9     0.1
DAYS >= 1.00        0               0.1    -0.1
GREATEST
 24 HR. TOTAL    0.84   05/17 TO 05/17

SNOWFALL (INCHES)
RECORDS
 TOTAL           13.9   1927
 24 HR TOTAL     12.5   05/10/1967 TO 05/10/1967
TOTALS            0.0               0.9    -0.9        T
SINCE 7/1        51.5              38.1    13.4
SNOWDEPTH AVG.      0
DAYS >= TRACE       0               0.8    -0.8
DAYS >= 1.0         0               0.3    -0.3
GREATEST
 SNOW DEPTH         0   MM
 24 HR TOTAL      0.0   05/31 TO 05/31

DEGREE_DAYS
HEATING TOTAL     273               351     -78      347
 SINCE 7/1       7350              7405     -55     6496
COOLING TOTAL       9                 8       1        0
 SINCE 1/1          9                 8       1        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.0
HIGHEST WIND SPEED/DIRECTION    39/270    DATE  05/24
HIGHEST GUST SPEED/DIRECTION    49/270    DATE  05/24

SKY COVER
AVERAGE SKY COVER           0.30

AVERAGE RH (PERCENT)     54

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN               12     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       6     FOG W/VIS <= 1/4 MILE      1
HAZE                      4

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

$$



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