Climatological Report (Monthly)
Issued by NWS Portland, OR
Issued by NWS Portland, OR
956
CXUS56 KPQR 011548
CLMHIO
CLIMATE REPORT
NATIONAL WEATHER SERVICE PORTLAND OREGON
748 AM PST THU JAN 01 2026
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...THE HILLSBORO OR CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2025...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1929 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
HIGHEST 63 58 12/17
12/18
LOWEST 26 23 12/02
AVG. MAXIMUM 51.7 46.2 5.5 49.4
AVG. MINIMUM 39.5 33.3 6.2 35.6
MEAN 45.6 39.8 5.8 42.5
DAYS MAX >= 90 0 0.0 0.0 0
DAYS MAX <= 32 0 1.0 -1.0 0
DAYS MIN <= 32 5 13.7 -8.7 9
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 14.60 2015
MINIMUM 1.08 2013
TOTALS 7.05 6.05 1.00 6.40
DAYS >= .01 22 19.9 2.1 23
DAYS >= .10 10 12.8 -2.8 19
DAYS >= .50 3 3.9 -0.9 3
DAYS >= 1.00 3 0.9 2.1 0
GREATEST
24 HR. TOTAL 1.97 12/18 TO 12/18
DEGREE DAYS
HEATING TOTAL 578 783 -205 689
SINCE 7/1 1537 1992 -455 MM
COOLING TOTAL 0 0 0 0
SINCE 1/1 483 275 208 MM
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WIND (MPH)
AVERAGE WIND SPEED 5.1
RESULTANT WIND SPEED/DIRECTION 3/200
HIGHEST WIND SPEED/DIRECTION 23/170 DATE 12/22
HIGHEST GUST SPEED/DIRECTION 48/290 DATE 12/17
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.73
AVERAGE RH (PERCENT) 86
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 9
LIGHT RAIN 22 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 23 FOG W/VIS <= 1/4 MILE 5
HAZE 0
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$