Climatological Report (Annual)
Issued by NWS Spokane, WA

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930
CXUS55 KOTX 011807
CLALWS


CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE, WA
954 AM PST TUE JAN 1 2019

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

...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE YEAR OF 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1881 TO 2018

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   08/09
LOWEST             11   02/20
AVG. MAXIMUM     65.2              63.5     1.7
AVG. MINIMUM     44.0              42.5     1.5
MEAN             54.6              53.0     1.6
DAYS MAX >= 90     45              40.1     4.9
DAYS MAX <= 32      8              12.7    -4.7
DAYS MIN <= 32     70              75.9    -5.9
DAYS MIN <= 0       0               0.7    -0.7

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        21.76   1884
 MINIMUM         7.73   2007
TOTALS          12.90             12.31    0.59
DAILY AVG.         MM              0.03      MM
DAYS >= .01       104             102.8     1.2
DAYS >= .10        43              39.7     3.3
DAYS >= .50         3               3.1    -0.1
DAYS >= 1.00        0               0.2    -0.2
GREATEST
 24 HR. TOTAL    0.99   MM

SNOWFALL (INCHES)
RECORDS
 TOTAL           62.2   1916
TOTALS            1.6              10.5    -8.9
DAYS >= TRACE      19              10.6     8.4
DAYS >= 1.0         0               3.9    -3.9
GREATEST
 24 HR TOTAL      0.7   MM

DEGREE_DAYS
HEATING TOTAL    4563              5167    -604
COOLING TOTAL     934               807     127

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

WIND (MPH)
AVERAGE WIND SPEED              5.1
HIGHEST WIND SPEED/DIRECTION    45/300    DATE  04/07
HIGHEST GUST SPEED/DIRECTION    61/290    DATE  04/07

SKY COVER
AVERAGE SKY COVER           0.40

AVERAGE RH (PERCENT)     59

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              9     MIXED PRECIP              MM
HEAVY RAIN                9     RAIN                      27
LIGHT RAIN              117     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW               16     SLEET                      0
FOG                      80     FOG W/VIS <= 1/4 MILE     26
HAZE                     33

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

$$




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