


Climatological Report (Monthly)
Issued by NWS
Issued by NWS
118 CXUS56 KSEW 011050 CLMOLM CLIMATE REPORT NATIONAL WEATHER SERVICE SEATTLE 350 AM PDT WED OCT 01 2025 ................................... ...THE OLYMPIA WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025... CLIMATE NORMAL PERIOD 1991 TO 2020 CLIMATE RECORD PERIOD 1941 TO 2025 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 98 09/02/1988 LOW 25 09/27/1972 HIGHEST 88 09/16 MM MM 95 09/05 LOWEST 40 09/19 MM MM 35 09/30 AVG. MAXIMUM 74.3 72.1 2.2 73.1 AVG. MINIMUM 49.0 46.2 2.8 49.3 MEAN 61.7 59.1 2.6 61.2 DAYS MAX >= 90 0 0.4 -0.4 2 DAYS MAX <= 32 0 0.0 0.0 0 DAYS MIN <= 32 0 0.2 -0.2 0 DAYS MIN <= 0 0 0.0 0.0 0 PRECIPITATION (INCHES) RECORD MAXIMUM 9.36 2013 MINIMUM T 2012 TOTALS 1.28 2.04 -0.76 1.91 DAILY AVG. 0.04 0.07 -0.03 0.06 DAYS >= .01 5 8.1 -3.1 10 DAYS >= .10 2 4.6 -2.6 5 DAYS >= .50 2 1.3 0.7 1 DAYS >= 1.00 0 0.3 -0.3 0 GREATEST 24 HR. TOTAL 0.60 09/21 TO 09/21 DEGREE DAYS HEATING TOTAL 102 183 -81 140 SINCE 7/1 174 325 -151 MM COOLING TOTAL 11 8 3 33 SINCE 1/1 201 113 88 MM ................................................................ WIND (MPH) AVERAGE WIND SPEED 4.0 HIGHEST WIND SPEED/DIRECTION 25/200 DATE 09/30 HIGHEST GUST SPEED/DIRECTION 37/210 DATE 09/30 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.32 NUMBER OF DAYS FAIR 17 NUMBER OF DAYS PC 10 NUMBER OF DAYS CLOUDY 3 AVERAGE RH (PERCENT) 74 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 2 MIXED PRECIP 0 HEAVY RAIN 1 RAIN 2 LIGHT RAIN 8 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 22 FOG W/VIS <= 1/4 MILE 6 HAZE 5 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$