142
CXUS56 KOTX 140229
CLMGEG
CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
729 PM PDT MON OCT 13 2025
...............................
...THE SPOKANE WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1881 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
............................................................
TEMPERATURE (F)
RECORD
HIGH 99 09/01/2025
LOW 22 09/23/2000
09/24/1926
HIGHEST 99R 09/01 MM MM 97 09/01
09/02
LOWEST 42 09/26 MM MM 35 09/30
AVG. MAXIMUM 80.9 73.6 7.3 79.5
AVG. MINIMUM 56.6 48.6 8.0 53.9
MEAN 68.8 61.1 7.7 66.7
DAYS MAX >= 90 4 1.4 2.6 5
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 0.4 -0.4 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 5.58 1927
MINIMUM T 2012
TOTALS 0.43 0.58 -0.15 0.04
DAILY AVG. 0.01 0.02 -0.01 0.00
DAYS >= .01 5 4.7 0.3 2
DAYS >= .10 1 1.8 -0.8 0
DAYS >= .50 0 0.2 -0.2 0
DAYS >= 1.00 0 0.0 0.0 0
GREATEST
24 HR. TOTAL 0.35 09/14 TO 09/15 0.03
SNOWFALL (INCHES)
RECORDS
TOTAL 3.3 2019
TOTALS 0.0 0.1 -0.1 0.0
SINCE 7/1 0.0 0.1 -0.1 MM
SNOWDEPTH AVG. 0 0
DAYS >= 1.0 0 0.1 -0.1 0
GREATEST
SNOW DEPTH 0 0 MM
24 HR TOTAL 0.0 MM
DEGREE DAYS
HEATING TOTAL 49 162 -113 69
SINCE 7/1 50 216 -166 MM
COOLING TOTAL 170 45 125 128
SINCE 1/1 831 514 317 MM
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WIND (MPH)
AVERAGE WIND SPEED 6.5
HIGHEST WIND SPEED/DIRECTION 23/200 DATE 09/21
23/240 09/25
23/210 09/29
HIGHEST GUST SPEED/DIRECTION 30/210 DATE 09/21
30/270 09/25
30/270 09/30
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.40
NUMBER OF DAYS FAIR 15
NUMBER OF DAYS PC 11
NUMBER OF DAYS CLOUDY 4
AVERAGE RH (PERCENT) 47
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 1 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 1
LIGHT RAIN 6 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 10
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
SEPTEMBER 2025 FINISHED WITH MUCH ABOVE NORMAL TEMPERATURES FOR
NORTHEAST WASHINGTON AND THE NORTH IDAHO PANHANDLE. IT WAS THE
WARMEST SEPTEMBER ON RECORD FOR MUCH OF THE REGION, INCLUDING SPOKANE
WITH AN AVERAGE TEMPERATURE OF 68.8 DEGREES. PRECIPITATION
AMOUNTS VARIED ACROSS THE REGION. THE FIRST FOUR DAYS OF THE MONTH
BROUGHT THE HOTTEST STRETCH OF THE SUMMER. SPOKANE AIRPORT REACHED
99F ON THE 1ST AND 2ND, AND 98F ON THE 3RD. LIGHTNING ALSO STARTED
FIRES ACROSS NORTHEAST WASHINGTON DURING THIS PERIOD WHICH BECAME
ACTIVE. AIR QUALITY RANGED FROM UNHEALTHY TO HAZARDOUS FOR SEVERAL
DAYS IN COLVILLE. THE 9TH AND 12TH BROUGHT MORE ACTIVE WEATHER WITH
MORNING THUNDERSTORMS. ON THE 9TH ABUNDANT LIGHTNING OCCURRED
AROUND DEER PARK AND ELK. THE 13TH AND 14TH BROUGHT MUCH COOLER
TEMPERATURES AS HIGH TEMPERATURES DROPPED INTO THE 60S, ALONG WITH
MUCH NEEDED RAIN. ONE OF THE WETTEST SPOTS WAS CLARK FORK, IDAHO
WITH 1.15 INCHES. THE SPOKANE AREA RECEIVED AROUND A QUARTER INCH,
EXCEPT FOR SPOTTER REPORTS AROUND THREE QUARTERS OF AN INCH IN NORTH
SPOKANE. ON THE 21ST WET THUNDERSTORMS WITH ABUNDANT LIGHTNING HIT
THE NORTHERN MOUNTAINS. THUNDERSTORMS PRODUCED BRIEF HEAVY RAIN AND
SMALL HAIL. ON THE 25TH A STRONG DRY COLD FRONT PASSED THROUGH THE
REGION BRINGING WINDY CONDITIONS AND VERY LOW RELATIVE HUMIDITY.
VALUES WERE NOTEWORTHY FOR ANY TIME OF THE YEAR, WITH WELLPINIT DOWN
TO 5 PERCENT, AND FAIRCHILD AIR FORCE BASE 7 PERCENT. THE WINDS
PUSHED SMOKE FROM FIRES IN THE CASCADES INTO THE SPOKANE AREA WITH
AIR QUALITY BRIEFLY BECOMING UNHEALTHY.
SEVERAL HEAT RECORDS WERE TIED OR BROKEN DURING THE MONTH AT THE
SPOKANE AIRPORT. THIS INCLUDES A RECORD HIGH OF 99F ON BOTH THE 1ST
AND 2ND, AND A TIED RECORD OF 98F ON THE 3RD. THE 99F HIGH
TEMPERATURES ALSO SET A RECORD FOR THE MONTH OF SEPTEMBER.
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