Portland, Oregon
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January -11.1° (1979) 18.3° (2005) 6.14" 0.8"
February 11° -13.3° (1989) 21.7° (1988) 4.79" 0.9"
March 13° -4.4° (1989) 26.1° (1994) 4.5" 0.1"
April 16° -0.6° (1975) 31.1° (2004) 3.4" 0"
May 20° 2.2° (1985) 39.4° (1983) 2.55" 0"
June 12° 23° 5° (1991) 38.3° (2006) 1.69" 0"
July 14° 26° 8.3° (1996) 40° (2006) 0.59" 0"
August 15° 27° 7.8° (1973) 41.1° (1981) 0.71" 0"
September 12° 24° 5° (1982) 39.4° (1988) 1.54" 0"
October 17° -0.6° (2002) 33.3° (1987) 3.42" 0"
November 11° -5° (1993) 21.7° (1999) 6.74" 0"
December -12.2° (1983) 19.4° (1993) 6.94" 1"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 14° 26° 7° (1973) 36° (1988) 0.03" 0"
Sep 2 14° 26° 9° (1975) 39° (1988) 0.04" 0"
Sep 3 14° 25° 9° (1980) 36° (2003) 0.04" 0"
Sep 4 14° 25° 9° (2002) 36° (1973) 0.04" 0"
Sep 5 13° 25° 9° (2001) 33° (1975) 0.04" 0"
Sep 6 13° 25° 8° (1992) 33° (1981) 0.04" 0"
Sep 7 13° 25° 8° (1976) 38° (1981) 0.04" 0"
Sep 8 13° 25° 8° (1973) 33° (1997) 0.04" 0"
Sep 9 13° 25° 8° (1985) 33° (1980) 0.04" 0"
Sep 10 13° 25° 9° (1999) 36° (1973) 0.05" 0"
Sep 11 13° 25° 8° (1986) 32° (1975) 0.04" 0"
Sep 12 13° 24° 9° (2010) 33° (1975) 0.05" 0"
Sep 13 13° 24° 9° (1992) 33° (1999) 0.05" 0"
Sep 14 13° 24° 7° (1986) 33° (1974) 0.04" 0"
Sep 15 13° 24° 6° (1996) 36° (1981) 0.05" 0"
Sep 16 12° 24° 7° (1978) 32° (1994) 0.05" 0"
Sep 17 12° 24° 8° (1983) 33° (1991) 0.05" 0"
Sep 18 12° 24° 7° (1988) 32° (1991) 0.06" 0"
Sep 19 12° 23° 6° (1983) 33° (1974) 0.05" 0"
Sep 20 12° 23° 8° (1989) 34° (1974) 0.06" 0"
Sep 21 12° 23° 7° (1993) 33° (1974) 0.06" 0"
Sep 22 12° 23° 7° (1981) 33° (1974) 0.06" 0"
Sep 23 12° 23° 6° (2000) 34° (1974) 0.06" 0"
Sep 24 11° 22° 6° (1984) 35° (1974) 0.06" 0"
Sep 25 11° 22° 7° (2000) 34° (1991) 0.07" 0"
Sep 26 11° 22° 8° (2000) 30° (1993) 0.06" 0"
Sep 27 11° 22° 6° (1999) 34° (2003) 0.07" 0"
Sep 28 11° 22° 6° (1983) 31° (1989) 0.07" 0"
Sep 29 11° 21° 5° (1982) 31° (1987) 0.07" 0"
Sep 30 11° 21° 6° (1983) 30° (1975) 0.06" 0"
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