Climatological Report (Monthly)
Issued by NWS

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CXUS55 KTFX 041621
CLMHLN

CLIMATE REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
1020 AM MDT THU JUN 4 2015

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

...THE HELENA MT CLIMATE SUMMARY FOR THE MONTH OF MAY 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1866 TO 2015

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            81   05/31        70      11       85  05/23
LOWEST             30   05/10        36      -6       26  05/12
AVG. MAXIMUM     65.3              67.1    -1.8     68.7
AVG. MINIMUM     42.7              40.8     1.9     40.9
MEAN             54.0              54.0     0.0     54.8
DAYS MAX >= 90      0               0.4    -0.4        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      1               3.0    -2.0        4
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         6.67   1927
 MINIMUM         0.24   1928
TOTALS           2.36              1.87    0.49     0.28
DAYS >= .01        12              11.1     0.9
DAYS >= .10         6               5.1     0.9
DAYS >= .50         2               0.9     1.1
DAYS >= 1.00        0               0.1    -0.1
GREATEST
 24 HR. TOTAL    0.86   05/16 TO 05/16

SNOWFALL (INCHES)
RECORDS
 TOTAL           13.9   1927
 24 HR TOTAL       MM
TOTALS            0.0               0.9    -0.9        T
SINCE 7/1        24.3              38.1   -13.8
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     330               351     -21      312
 SINCE 7/1       6525              7405    -880     7323
COOLING TOTAL       0                 8      -8        4
 SINCE 1/1          0                 8      -8        4
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.1
HIGHEST WIND SPEED/DIRECTION    30/130    DATE  05/29
HIGHEST GUST SPEED/DIRECTION    38/080    DATE  05/20

SKY COVER
AVERAGE SKY COVER           0.50

AVERAGE RH (PERCENT)     57

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       5
LIGHT RAIN               14     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                      3

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

$$

AFTER A DRY START TO THE MONTH...RAINFALL PICKED UP DURING THE 2ND
HALF OF MAY IN THE HELENA AREA...WITH A MONTHLY TOTAL OF 2.36
INCHES. THIS RESULTED IN THE 33RD WETTEST MAY ON RECORD. HELENA DID
SET A RECORD RAINFALL ON SATURDAY MAY 16TH WITH A RAINFALL OF 0.86
INCHES. THE AVERAGE TEMPERATURE FOR THE MONTH WAS EXACTLY AVERAGE
FOR MAY...WITH AN AVERAGE TEMPERATURE OF 54.0 DEGREES.



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