Climatological Report (Annual)
Issued by NWS Spokane, WA

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431
CXUS55 KOTX 251702 CCA
CLALWS

CLIMATE REPORT...CORRECTED
NATIONAL WEATHER SERVICE SPOKANE, WA
420 AM PST FRI JAN 1 2016

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

...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE YEAR OF 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1881 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH             117   07/27/1939
 LOW              -23   12/13/1919
HIGHEST           111   06/28
LOWEST             11   01/01
AVG. MAXIMUM     67.3              63.5     3.8
AVG. MINIMUM     45.4              42.5     2.9
MEAN             56.4              53.0     3.4
DAYS MAX >= 90     53              40.1    12.9
DAYS MAX <= 32      9              12.7    -3.7
DAYS MIN <= 32     65              75.9   -10.9
DAYS MIN <= 0       0               0.7    -0.7

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        21.76   1884
 MINIMUM         7.73   2007
TOTALS          10.22             12.31   -2.09
DAILY AVG.       0.03              0.03    0.00
DAYS >= .01        88             102.8   -14.8
DAYS >= .10        30              39.7    -9.7
DAYS >= .50         5               3.1     1.9
DAYS >= 1.00        0               0.2    -0.2
GREATEST
 24 HR. TOTAL    1.18   MM

SNOWFALL (INCHES)
RECORDS
 TOTAL           62.2   1916
TOTALS            7.2              10.5    -3.3
DAYS >= TRACE      15              10.6     4.4
DAYS >= 1.0         2               3.9    -1.9
GREATEST
 24 HR TOTAL      2.6   MM

DEGREE_DAYS
HEATING TOTAL    4228              5167    -939
COOLING TOTAL    1215               807     408

FREEZE DATES
RECORD
 EARLIEST     09/17/1965
 LATEST       05/12/1985
EARLIEST                        10/24
LATEST                          04/07
.................................................

WIND (MPH)
AVERAGE WIND SPEED              5.3
HIGHEST WIND SPEED/DIRECTION    46/250    DATE  12/09
HIGHEST GUST SPEED/DIRECTION    73/180    DATE  08/29

SKY COVER
AVERAGE SKY COVER           0.30

AVERAGE RH (PERCENT)     56

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             20     MIXED PRECIP               0
HEAVY RAIN                5     RAIN                      19
LIGHT RAIN              126     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW               16     SLEET                      0
FOG                      80     FOG W/VIS <= 1/4 MILE     28
HAZE                     39

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

$$



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