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000
CXUS46 KOTX 011301
CLMLWS

CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
601 AM PDT SUN OCT 01 2023

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

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

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.