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) 5.07" 1.6"
February 10° -19.4° (1950) 21.7° (1988) 4.18" 1.6"
March 13° -7.2° (1989) 28.3° (1947) 3.71" 0.1"
April 16° -1.7° (1955) 32.2° (1998) 2.64" 0"
May 19° -1.7° (1954) 37.8° (1983) 2.38" 0"
June 12° 23° 3.9° (1966) 38.9° (2006) 1.59" 0"
July 14° 26° 6.1° (1955) 41.7° (1965) 0.72" 0"
August 14° 27° 6.7° (1980) 41.7° (1981) 0.93" 0"
September 12° 24° 1.1° (1965) 40.6° (1988) 1.65" 0"
October 17° -3.3° (1971) 33.3° (1987) 2.88" 0"
November 11° -10.6° (1985) 22.8° (1975) 5.61" 0.6"
December -14.4° (1964) 18.3° (1993) 5.71" 1.3"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 13.3° 25.6° 7° (1973) 37° (1988) 0.04" NA
Sep 2 12.8° 25.6° 6° (1960) 41° (1988) 0.04" NA
Sep 3 12.8° 25.6° 7° (1980) 34° (2003) 0.05" NA
Sep 4 12.8° 25.6° 6° (1956) 37° (1955) 0.05" NA
Sep 5 12.8° 25° 7° (1956) 34° (1987) 0.05" NA
Sep 6 12.8° 25° 7° (1960) 36° (1958) 0.05" NA
Sep 7 12.2° 25° 6° (1992) 37° (1981) 0.05" NA
Sep 8 12.2° 25° 6° (1961) 34° (1993) 0.05" NA
Sep 9 12.2° 25° 6° (1962) 34° (1948) 0.05" NA
Sep 10 12.2° 24.4° 6° (1964) 35° (1973) 0.05" NA
Sep 11 12.2° 24.4° 6° (1964) 32° (1975) 0.05" NA
Sep 12 11.7° 24.4° 5° (1955) 33° (1975) 0.05" NA
Sep 13 11.7° 24.4° 3° (1970) 34° (1999) 0.05" NA
Sep 14 11.7° 23.9° 6° (1992) 33° (1995) 0.06" NA
Sep 15 11.7° 23.9° 4° (1970) 36° (1981) 0.06" NA
Sep 16 11.1° 23.9° 5° (1965) 33° (1994) 0.06" NA
Sep 17 11.1° 23.3° 1° (1965) 34° (1962) 0.06" NA
Sep 18 11.1° 23.3° 2° (1965) 34° (1991) 0.06" NA
Sep 19 11.1° 23.3° 4° (1957) 34° (1974) 0.06" NA
Sep 20 11.1° 23.3° 4° (1957) 36° (1952) 0.06" NA
Sep 21 10.6° 22.8° 4° (1964) 34° (1952) 0.06" NA
Sep 22 10.6° 22.8° 1° (1961) 34° (1994) 0.06" NA
Sep 23 10.6° 22.8° 4° (2000) 34° (1974) 0.06" NA
Sep 24 10.6° 22.2° 2° (1970) 36° (1974) 0.06" NA
Sep 25 10° 22.2° 3° (1955) 34° (1991) 0.06" NA
Sep 26 10° 21.7° 3° (1961) 33° (1967) 0.06" NA
Sep 27 10° 21.7° 3° (1961) 35° (2003) 0.06" NA
Sep 28 10° 21.7° 3° (1983) 32° (1989) 0.06" NA
Sep 29 9.4° 21.1° 3° (1954) 32° (1993) 0.06" NA
Sep 30 9.4° 21.1° 2° (1954) 31° (1987) 0.06" NA
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