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Climatological Report (Annual)
Issued by NWS Spokane, WA

000
CXUS56 KOTX 090213
CLALWS

CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
611 PM PST FRI JAN 08 2021

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

...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE YEAR OF 2020...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1881 TO 2021

WEATHER         OBSERVED          NORMAL  DEPART
                VALUE   DATE(S)   VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH            117   07/27/1939
 LOW             -23   12/13/1919
HIGHEST          105   07/31
                       07/30
LOWEST            13   01/15
AVG. MAXIMUM    61.0               63.5    -2.5
AVG. MINIMUM    41.2               42.5    -1.3
MEAN            51.1               53.0    -1.9
DAYS MAX >= 90    19               40.1   -21.1
DAYS MAX <= 32     3               12.7    -9.7
DAYS MIN <= 32    80               75.9     4.1
DAYS MIN <= 0      0                0.7    -0.7

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       21.76   1884
 MINIMUM        7.73   2007
TOTALS         14.50              12.31    2.19
DAILY AVG.      0.05               0.03    0.02
DAYS >= .01       94              102.8    -8.8
DAYS >= .10       41               39.7     1.3
DAYS >= .50        6                3.1     2.9
DAYS >= 1.00       1                0.2     0.8
GREATEST
 24 HR. TOTAL   1.24

SNOWFALL (INCHES)
RECORDS
 TOTAL          62.2   1916
TOTALS          16.6               10.5     6.1
DAYS >= TRACE     20               10.6     9.4
DAYS >= 1.0        5                3.9     1.1
GREATEST
 24 HR TOTAL     4.8

DEGREE DAYS
HEATING TOTAL   4630               5167    -537
COOLING TOTAL    475                807    -332

FREEZE DATES
RECORD
 EARLIEST     09/17/1965
 LATEST       05/12/1985
EARLIEST                        10/22
LATEST                          04/17
................................................

WIND (MPH)
AVERAGE WIND SPEED              5.7
HIGHEST WIND SPEED/DIRECTION    38/190    DATE  02/01
HIGHEST GUST SPEED/DIRECTION    51/260    DATE  10/13

SKY COVER
AVERAGE SKY COVER           0.44

AVERAGE RH (PERCENT)     60

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             13     MIXED PRECIP               0
HEAVY RAIN                5     RAIN                      26
LIGHT RAIN              115     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW               20     SLEET                      0
FOG                      84     FOG W/VIS <= 1/4 MILE     32
HAZE                     37

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

$$