Climatological Report (Monthly)
Issued by NWS Spokane, WA
Issued by NWS Spokane, WA
456
CXUS46 KOTX 011254
CLMLWS
CLIMATE REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
554 AM PDT SUN JUN 01 2025
...................................
...THE LEWISTON ID AIRPORT CLIMATE SUMMARY FOR THE MONTH OF MAY 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 104 05/28/1934
LOW 23 05/01/1954
HIGHEST 94 05/28 MM MM MM 05/11
05/12
LOWEST 40 05/06 MM MM 35 05/01
05/02
AVG. MAXIMUM 75.4 72.0 3.4 72.1
AVG. MINIMUM 48.8 48.1 0.7 47.5
MEAN 62.1 60.0 2.1 59.8
DAYS MAX >= 90 3 1.0 2.0 0
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 3.78 1978
MINIMUM T 1924
TOTALS 0.51 1.69 -1.18 0.79
DAILY AVG. 0.02 0.05 -0.03 0.03
DAYS >= .01 7 10.6 -3.6 6
DAYS >= .10 2 5.6 -3.6 1
DAYS >= .50 0 0.6 -0.6 1
DAYS >= 1.00 0 0.1 -0.1 0
GREATEST
24 HR. TOTAL 0.18 05/11 TO 05/12 0.59
SNOWFALL (INCHES)
RECORDS
TOTAL 0.3 1916
TOTALS 0.0 0.0 0.0 0.0
SINCE 7/1 11.6 12.7 -1.1 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 134 187 -53 178
SINCE 7/1 4525 4921 -396 MM
COOLING TOTAL 51 34 17 23
SINCE 1/1 52 36 16 MM
................................................................
WIND (MPH)
AVERAGE WIND SPEED 6.0
HIGHEST WIND SPEED/DIRECTION 36/300 DATE 05/31
HIGHEST GUST SPEED/DIRECTION 51/290 DATE 05/31
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.32
NUMBER OF DAYS FAIR 18
NUMBER OF DAYS PC 7
NUMBER OF DAYS CLOUDY 6
AVERAGE RH (PERCENT) 53
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 1 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 1
LIGHT RAIN 13 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 1
HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$
MAY 2025 BROUGHT NEAR NORMAL TEMPERATURES AND BELOW NORMAL
PRECIPITATION TO SOUTHEAST WASHINGTON AND THE SOUTH IDAHO PANHANDLE.
THE MONTH STARTED OFF MILD AND DRY WITH HIGH TEMPERATURES MAINLY IN
THE 70S AND 80S THROUGH THE 10TH. ON THE 11TH THROUGH THE 20TH A
COOLER AND SHOWERY PATTERN RETURNED WITH HIGHS MAINLY IN THE 60S.
ISOLATED THUNDERSTORMS OCCURRED AS WELL. ON THE 12TH THUNDERSTORMS
TRACKED SOUTH AND EAST OF LEWISTON, WHILE ON THE 19TH THUNDERSTORMS
WITH ABUNDANT LIGHTNING TRACKED FROM RITZVILLE EAST TO ST JOHN. ON
THE 31ST A STRONG COLD FRONT ARRIVED TO CLOSE OUT THE MONTH BRINGING
WINDY CONDITIONS, AND BLOWING DUST FROM CONNELL THROUGH THE PALOUSE.
PEAK WIND GUSTS INCLUDE 52 MPH AT THE LEWISTON AIRPORT, 48 MPH
WASHTUNCA, AND 45 MPH ON SHIRROD HILL.
NO RECORDS WERE SET DURING THE MONTH AT THE LEWISTON AIRPORT.