Climatological Report (Monthly) Issued by NWS Spokane, WA
000
CXUS46 KOTX 011301
CLMLWS
CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
601 AM PDT SUN OCT 01 2023
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...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2023...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1881 TO 2023
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 108 09/06/1944
LOW 27 09/24/1926
HIGHEST 97 09/16 MM MM 102 09/02
LOWEST 46 09/20 MM MM 48 09/17
09/29
AVG. MAXIMUM 78.5 79.5 -1.0 82.5
AVG. MINIMUM 54.2 52.3 1.9 55.3
MEAN 66.4 65.9 0.5 68.9
DAYS MAX >= 90 6 4.4 1.6 6
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 1.04 0.60 0.44 1.38
DAILY AVG. 0.03 0.02 0.01 0.05
DAYS >= .01 10 4.7 5.3 7
DAYS >= .10 4 1.8 2.2 3
DAYS >= .50 0 0.2 -0.2 2
DAYS >= 1.00 0 0.0 0.0 0
GREATEST
24 HR. TOTAL 0.49 09/20 TO 09/21 0.62
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 0.0
DEGREE DAYS
HEATING TOTAL 82 76 6 15
SINCE 7/1 83 88 -5 MM
COOLING TOTAL 128 102 26 138
SINCE 1/1 1312 908 404 MM
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WIND (MPH)
AVERAGE WIND SPEED 4.2
HIGHEST WIND SPEED/DIRECTION 29/280 DATE 09/07
HIGHEST GUST SPEED/DIRECTION 38/280 DATE 09/07
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.28
NUMBER OF DAYS FAIR 19
NUMBER OF DAYS PC 6
NUMBER OF DAYS CLOUDY 5
AVERAGE RH (PERCENT) 53
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 2
LIGHT RAIN 11 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 4
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$
SEPTEMBER 2023 BROUGHT NEAR NORMAL TEMPERATURES AND ABOVE NORMAL
PRECIPITATION TO SOUTHEAST WASHINGTON AND THE LEWISTON AREA WHILE
PRECIPITATION WAS BELOW NORMAL IN THE SOUTH IDAHO PANHANDLE. THERE
WRE JUST A COUPLE SIGNIFICANT WEATHER EVENTS DURING THE MONTH. THE
FIRST WAS SCATTERED THUNDERSTORMS ON THE 7TH WHICH TRACKED FROM THE
BLUE MOUNTAINS INTO THE PALOUSE. LEWISTON RECORDED A WIND GUST OF 38
MPH. SECOND WAS ABNORMALLY WARM TEMPERATURES FROM THE 15TH THROUGH
THE 17TH WITH LEWISTON WARMING INTO THE LOW TO MID 90S FROM THE 15TH
THROUGH THE 17TH. THE HEAT PEAKED ON THE 16TH WITH A HIGH
TEMPERATURE OF 97F, WHICH TIED A RECORD FOR THE DATE.