Climatological Report (Annual)
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CLIMATE REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
654 PM MST WED JAN 5 2011

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

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

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1880 TO 2010

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH             111   08/05/1961
 LOW              -57   01/27/1916
HIGHEST           103   08/26        MM      MM
LOWEST            -37   01/07        MM      MM
AVG. MAXIMUM     52.7              56.7    -4.0
AVG. MINIMUM     27.6              29.4    -1.8
MEAN             40.2              43.1    -2.9
DAYS MAX >= 90     17              24.5    -7.5
DAYS MAX <= 32     90              57.5    32.5
DAYS MIN <= 32    186             178.4     7.6
DAYS MIN <= 0      52              35.2    16.8

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        25.67   1884
 MINIMUM         4.99   1990
TOTALS          14.81             11.46    3.35
DAILY AVG.       0.04              0.03    0.01
DAYS >= .01       102              89.7    12.3
DAYS >= .10        46              31.9    14.1
DAYS >= .50         9               4.5     4.5
DAYS >= 1.00        0               1.1    -1.1
GREATEST
 24 HR. TOTAL    1.34   MM
 STORM TOTAL       MM
 (MM/DD(HH))            MM

SNOWFALL (INCHES)
RECORDS
 TOTAL           82.1   1975
 24 HR TOTAL     24.8   05/02/1899
 SNOW DEPTH        19   01/10/2009
                        01/09/2009
TOTALS           58.4              45.4    13.0
 LIQUID EQUIV    5.84                MM      MM
SINCE 7/1        35.6              15.7    19.9
 LIQUID 7/1      3.56
SNOWDEPTH AVG.      4                MM      MM
DAYS >= TRACE      62              36.6    25.4
DAYS >= 1.0        15              13.9     1.1
GREATEST
 SNOW DEPTH        18   12/31
                        12/30
 24 HR TOTAL     12.0   MM
 STORM TOTAL       MM
 (MM/DD(HH))            MM

DEGREE_DAYS
HEATING TOTAL    9146              8250     896
 SINCE 7/1       3763              3453     310
COOLING TOTAL     237               377    -140
 SINCE 1/1        237               377    -140

FREEZE DATES
RECORD
 EARLIEST     09/03/1962
 LATEST       09/30/1985
EARLIEST                        09/19
LATEST                          09/25
.................................................

WIND (MPH)
AVERAGE WIND SPEED              8.9
RESULTANT WIND SPEED/DIRECTION   3/254
HIGHEST WIND SPEED/DIRECTION    52/280    DATE  04/08
HIGHEST GUST SPEED/DIRECTION    67/260    DATE  08/01

SKY COVER


AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             26     MIXED PRECIP               0
HEAVY RAIN               11     RAIN                      21
LIGHT RAIN               99     FREEZING RAIN              0
LT FREEZING RAIN          2     HAIL                       0
HEAVY SNOW                5     SNOW                      12
LIGHT SNOW               68     SLEET                      0
FOG                     145     FOG W/VIS <= 1/4 MILE     40
HAZE                     41

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

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