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.

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