Climatological Report (Monthly)
Issued by NWS Portland, OR
Issued by NWS Portland, OR
942
CXUS56 KPQR 011548
CLMSPB
CLIMATE REPORT
NATIONAL WEATHER SERVICE PORTLAND OREGON
748 AM PST THU JAN 01 2026
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...THE SCAPPOOSE OR CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2025...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 9999 TO 9999
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
HIGHEST 61 57 12/18
LOWEST 27 23 12/04
AVG. MAXIMUM 51.8 46.1 5.7 48.2
AVG. MINIMUM 40.0 33.7 6.3 35.0
MEAN 45.9 39.9 6.0 41.6
DAYS MAX >= 90 0 0.0 0.0 0
DAYS MAX <= 32 0 1.1 -1.1 0
DAYS MIN <= 32 6 13.3 -7.3 9
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 8.39 2022
MINIMUM 1.23 2020
TOTALS 7.76 7.25 0.51 8.17
DAYS >= .01 21 19.7 1.3 20
DAYS >= .10 10 13.5 -3.5 18
DAYS >= .50 8 4.8 3.2 4
DAYS >= 1.00 2 1.4 0.6 2
GREATEST
24 HR. TOTAL 2.07 12/08 TO 12/09
DEGREE DAYS
HEATING TOTAL 585 778 -193 716
SINCE 7/1 1533 1916 -383 MM
COOLING TOTAL 0 0 0 0
SINCE 1/1 515 334 181 MM
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WIND (MPH)
AVERAGE WIND SPEED 3.2
RESULTANT WIND SPEED/DIRECTION 1/180
HIGHEST WIND SPEED/DIRECTION 20/230 DATE 12/18
HIGHEST GUST SPEED/DIRECTION 32/290 DATE 12/18
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.78
AVERAGE RH (PERCENT) 87
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 4 RAIN 10
LIGHT RAIN 25 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 29 FOG W/VIS <= 1/4 MILE 6
HAZE 0
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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