Climatological Report (Monthly)
Issued by NWS Spokane, WA

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CXUS46 KOTX 010853
CLMLWS

CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
153 AM PDT SAT OCT 01 2022

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

...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2022...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1881 TO 2022

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            108   09/06/1944
 LOW              27   09/24/1926
HIGHEST          102   09/02         MM      MM       92  09/08
LOWEST            48   09/17         MM      MM       46  09/29
AVG. MAXIMUM    82.5               79.5     3.0     80.0
AVG. MINIMUM    55.3               52.3     3.0     53.4
MEAN            68.9               65.9     3.0     66.7
DAYS MAX >= 90     6                4.4     1.6        4
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.0     0.0        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        4.37   1940
 MINIMUM           T   2012
TOTALS          1.38               0.60    0.78     0.69
DAILY AVG.      0.05               0.02    0.03     0.02
DAYS >= .01        7                4.7     2.3        6
DAYS >= .10        3                1.8     1.2        2
DAYS >= .50        2                0.2     1.8        0
DAYS >= 1.00       0                0.0     0.0        0
GREATEST
 24 HR. TOTAL   0.62   09/29 TO 09/30               0.39

SNOWFALL (INCHES)
RECORDS
 TOTAL             T   1926
TOTALS           0.0                0.0     0.0      0.0
SINCE 7/1        0.0                0.0     0.0       MM
SNOWDEPTH AVG.     0                                   0
DAYS >= 1.0        0                0.0     0.0        0
GREATEST
 SNOW DEPTH        0                                   0  MM
 24 HR TOTAL      MM                                  MM

DEGREE DAYS
HEATING TOTAL     15                 76     -61       38
 SINCE 7/1        15                 88     -73       MM
COOLING TOTAL    138                102      36       97
 SINCE 1/1      1139                908     231       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              3.9
HIGHEST WIND SPEED/DIRECTION    24/050    DATE  09/03
HIGHEST GUST SPEED/DIRECTION    32/050    DATE  09/03

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.21
NUMBER OF DAYS FAIR           22
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY          2

AVERAGE RH (PERCENT)     46

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       5
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       4     FOG W/VIS <= 1/4 MILE      0
HAZE                     12

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

$$

SEPTEMBER 2022 FINISHED WARMER THAN NORMAL ACROSS THE REGION.
PRECIPITATION WAS ABOVE NORMAL ACROSS SOUTHEAST WASHINGTON INTO THE
SOUTH IDAHO PANHANDLE. THE MONTH STARTED OFF HOT WITH HIGH
TEMPERATURES ON THE 2ND REACHING 102F IN LEWISTON. THE HEAT CAME TO
AN END ON THE 3RD WITH ISOLATED THUNDERSTORMS OVER THE REGION.
MEANWHILE FIRES IN NE WASHINGTON AND MUCH OF IDAHO CONTINUED TO BURN
ACTIVE DURING THE FIRST HALF OF SEPTEMBER.  FROM THE 10TH THROUGH
THE 14TH SMOKE INCREASED OVER THE REGION AS EAST WINDS BROUGHT IN
SMOKE FROM SEVERAL WILDFIRES INTO EASTERN WASHINGTON. FOR LEWISTON
THE WORST OF THE AIR QUALITY WAS FROM THE 10TH THROUGH THE 13TH WITH
VALUES REACHED UNHEALTHY LEVELS. THUNDERSTORMS ON THE 14TH BROUGHT
SOME RELIEF FROM THE SMOKE.  FOR THE REMAINDER OF THE MONTH HIGHS
WERE MAINLY IN THE 70S TO LOWER 80S, WITH A FEW EXCEPTIONS. A BRIEF
AND RAPID WARMUP OCCURRED ON THE 26TH AND 27TH WHERE LEWISTON
REACHED 90F. MEANWHILE ON THE 22ND AND 29TH COOL AND WET DAYS
BROUGHT OVER A HALF INCH OF RAIN TO LEWISTON WITH HIGHS IN THE 60S.
PULLMAN RECEIVED HEAVIER RAIN ON THE 29TH WITH 1.25 INCHES.  THIS
MADE IT THE 4TH WETTEST SEPTEMBER DAY ON RECORD.

NO RECORDS WERE SET DURING THE MONTH AT THE LEWISTON AIRPORT.


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