Portland, Oregon
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January -18.9° (1950) 18.9° (2005) 4.88" 0.5"
February 11° -19.4° (1950) 21.7° (1988) 3.79" 2.1"
March 14° -7.2° (1989) 28.3° (1947) 3.68" 0.2"
April 16° -1.7° (1955) 32.2° (1998) 2.73" 0"
May 20° -1.7° (1954) 37.8° (1983) 2.47" 0"
June 12° 23° 3.9° (1966) 38.9° (2006) 1.7" 0"
July 14° 27° 6.1° (1955) 41.7° (1965) 0.65" 0"
August 15° 27° 6.7° (1980) 41.7° (1981) 0.67" 0"
September 12° 24° 1.1° (1965) 40.6° (1988) 1.47" 0"
October 18° -3.3° (1971) 33.3° (1987) 3" 0"
November 12° -10.6° (1985) 22.8° (1975) 5.63" 0.2"
December -14.4° (1964) 18.3° (1993) 5.49" 1.3"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 13° 26° -18° (1973) 37° (1988) 0.03" 0"
Sep 2 13° 26° -18° (1960) 41° (1988) 0.04" 0"
Sep 3 13° 26° -18° (1980) 34° (2003) 0.03" 0"
Sep 4 13° 26° -18° (1956) 37° (1955) 0.04" 0"
Sep 5 13° 26° -18° (1956) 38° (1944) 0.04" 0"
Sep 6 13° 26° -18° (1960) 36° (1958) 0.05" 0"
Sep 7 13° 26° -18° (1992) 37° (1981) 0.04" 0"
Sep 8 13° 26° -18° (1961) 34° (1993) 0.04" 0"
Sep 9 13° 25° -18° (1962) 34° (1948) 0.04" 0"
Sep 10 13° 25° -18° (1964) 37° (1944) 0.04" 0"
Sep 11 12° 25° -18° (1964) 34° (2009) 0.05" 0"
Sep 12 12° 25° -18° (1955) 33° (1975) 0.04" 0"
Sep 13 12° 25° -18° (1970) 34° (1999) 0.04" 0"
Sep 14 12° 25° -18° (1992) 33° (1995) 0.05" 0"
Sep 15 12° 25° -18° (1970) 36° (1981) 0.04" 0"
Sep 16 12° 25° -18° (1965) 33° (1994) 0.05" 0"
Sep 17 12° 24° -18° (1965) 34° (1962) 0.05" 0"
Sep 18 11° 24° -18° (1965) 34° (1991) 0.05" 0"
Sep 19 11° 24° -18° (1957) 34° (1974) 0.05" 0"
Sep 20 11° 24° -18° (1957) 36° (1952) 0.06" 0"
Sep 21 11° 24° -18° (1964) 34° (1952) 0.05" 0"
Sep 22 11° 23° -18° (1961) 34° (1994) 0.06" 0"
Sep 23 11° 23° -18° (2000) 34° (1974) 0.06" 0"
Sep 24 11° 23° -18° (1970) 36° (1974) 0.05" 0"
Sep 25 10° 23° -18° (1955) 34° (1991) 0.06" 0"
Sep 26 10° 23° -18° (1961) 33° (1967) 0.07" 0"
Sep 27 10° 22° -18° (1961) 35° (2003) 0.06" 0"
Sep 28 10° 22° -18° (1983) 32° (1989) 0.06" 0"
Sep 29 10° 22° -18° (1954) 32° (2008) 0.07" 0"
Sep 30 10° 22° -18° (1954) 31° (1987) 0.06" 0"
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