Climatological Report (Annual)
Issued by NWS Spokane, WA

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CXUS56 KOTX 191625 CCA
CLALWS

CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE, WA
729 PM PST SAT JAN 11 2020

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

...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE YEAR OF 2019...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1881 TO 2020

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH             117   07/27/1939
 LOW              -23   12/13/1919
HIGHEST           104   08/07
LOWEST              9   03/04
AVG. MAXIMUM     62.6              63.5    -0.9
AVG. MINIMUM     42.6              42.5     0.1
MEAN             52.6              53.0    -0.4
DAYS MAX >= 90     42              40.1     1.9
DAYS MAX <= 32     22              12.7     9.3
DAYS MIN <= 32    106              75.9    30.1
DAYS MIN <= 0       0               0.7    -0.7

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        21.76   1884
 MINIMUM         7.73   2007
TOTALS          13.37             12.31    1.06
DAILY AVG.       0.04              0.03    0.01
DAYS >= .01       107             102.8     4.2
DAYS >= .10        41              39.7     1.3
DAYS >= .50         3               3.1    -0.1
DAYS >= 1.00        0               0.2    -0.2
GREATEST
 24 HR. TOTAL    0.94   MM

SNOWFALL (INCHES)
RECORDS
 TOTAL           62.2   1916
TOTALS           34.6              10.5    24.1
DAYS >= TRACE      33              10.6    22.4
DAYS >= 1.0        10               3.9     6.1
GREATEST
 24 HR TOTAL      5.9   MM

DEGREE_DAYS
HEATING TOTAL    5358              5167     191
COOLING TOTAL     964               807     157

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

WIND (MPH)
AVERAGE WIND SPEED              5.0
HIGHEST WIND SPEED/DIRECTION    38/220    DATE  07/23
HIGHEST GUST SPEED/DIRECTION    51/170    DATE  01/03

SKY COVER
AVERAGE SKY COVER           0.40

AVERAGE RH (PERCENT)     59

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             19     MIXED PRECIP              MM
HEAVY RAIN                6     RAIN                      20
LIGHT RAIN              111     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       7
LIGHT SNOW               38     SLEET                     MM
FOG                      90     FOG W/VIS <= 1/4 MILE     32
HAZE                     34

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

$$



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