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CLIMATE REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
644 PM MST WED JAN 5 2011

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

...THE HELENA MT CLIMATE SUMMARY FOR THE YEAR OF 2010...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1866 TO 2010

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH             105   07/12/2002
                        08/24/1969
 LOW              -42   02/02/1996
                        01/25/1957
                        01/31/1893
HIGHEST            97   08/26        MM      MM
LOWEST            -20   01/07        MM      MM
AVG. MAXIMUM     55.2              56.8    -1.6
AVG. MINIMUM     32.0              31.3     0.7
MEAN             43.6              44.1    -0.5
DAYS MAX >= 90     12              18.6    -6.6
DAYS MAX <= 32     55              47.3     7.7
DAYS MIN <= 32    175             181.0    -6.0
DAYS MIN <= 0      15              22.3    -7.3

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        20.94   1975
 MINIMUM         6.26   1973
TOTALS          12.97             11.32    1.65
DAILY AVG.       0.03              0.03    0.00
DAYS >= .01       100              94.1     5.9
DAYS >= .10        42              33.5     8.5
DAYS >= .50         3               4.0    -1.0
DAYS >= 1.00        1               0.5     0.5
GREATEST
 24 HR. TOTAL    1.15   MM
 STORM TOTAL       MM
 (MM/DD(HH))            MM

SNOWFALL (INCHES)
RECORDS
 TOTAL          118.4   1924
 24 HR TOTAL     18.8   11/11/1959
TOTALS           30.2              43.3   -13.1
 LIQUID EQUIV    3.02                MM      MM
SINCE 7/1        17.6              17.1     0.5
SNOWDEPTH AVG.      1                 0       1
DAYS >= TRACE      58              36.0    22.0
DAYS >= 1.0        14              12.9     1.1
GREATEST
 SNOW DEPTH         7   01/24
                        01/06
                        01/07
 24 HR TOTAL      2.6   MM
 STORM TOTAL       MM
 (MM/DD(HH))            MM

DEGREE_DAYS
HEATING TOTAL    7904              7975     -71
 SINCE 7/1       3382              3378       4
COOLING TOTAL     232               277     -45
 SINCE 1/1        232               277     -45

FREEZE DATES
RECORD
 EARLIEST     08/25/1992
 LATEST       06/20/1902
EARLIEST                        09/20
LATEST                          05/19
.................................................

WIND (MPH)
AVERAGE WIND SPEED              5.8
RESULTANT WIND SPEED/DIRECTION   3/277
HIGHEST WIND SPEED/DIRECTION    44/270    DATE  05/03
HIGHEST GUST SPEED/DIRECTION    61/280    DATE  05/03

SKY COVER


AVERAGE RH (PERCENT)     60

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             25     MIXED PRECIP               0
HEAVY RAIN                5     RAIN                      15
LIGHT RAIN              102     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                3     SNOW                      11
LIGHT SNOW               57     SLEET                      0
FOG                     125     FOG W/VIS <= 1/4 MILE     22
HAZE                     72

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

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