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
May 1 7.2° 17.8° -2° (1954) 29° (1998) 0.08" NA
May 2 7.2° 17.8° 0° (1964) 26° (1992) 0.08" NA
May 3 7.2° 17.8° 1° (1964) 32° (1992) 0.08" NA
May 4 7.2° 17.8° 1° (1962) 32° (1992) 0.08" NA
May 5 7.2° 17.8° 2° (1978) 31° (1992) 0.08" NA
May 6 7.8° 18.3° 2° (1965) 33° (1987) 0.08" NA
May 7 7.8° 18.3° 2° (1965) 34° (1987) 0.08" NA
May 8 7.8° 18.3° 2° (1965) 33° (1987) 0.08" NA
May 9 7.8° 18.3° 2° (1955) 30° (1987) 0.08" NA
May 10 7.8° 18.9° 3° (1999) 29° (1993) 0.08" NA
May 11 8.3° 18.9° 3° (1985) 33° (1971) 0.08" NA
May 12 8.3° 18.9° 3° (1985) 31° (1973) 0.08" NA
May 13 8.3° 18.9° 2° (1963) 33° (1973) 0.08" NA
May 14 8.3° 18.9° 1° (1964) 30° (1973) 0.08" NA
May 15 8.3° 19.4° 2° (1964) 34° (2006) 0.08" NA
May 16 8.9° 19.4° 4° (1950) 31° (1985) 0.08" NA
May 17 8.9° 19.4° 3° (1966) 32° (1958) 0.08" NA
May 18 8.9° 19.4° 3° (2003) 30° (1963) 0.08" NA
May 19 8.9° 19.4° 4° (2003) 33° (1961) 0.08" NA
May 20 8.9° 20° 3° (1975) 33° (1963) 0.08" NA
May 21 8.9° 20° 3° (1955) 31° (1988) 0.08" NA
May 22 9.4° 20° 1° (1960) 35° (2001) 0.07" NA
May 23 9.4° 20° 2° (1964) 32° (2001) 0.07" NA
May 24 9.4° 20° 3° (1955) 34° (1992) 0.07" NA
May 25 9.4° 20° 3° (1975) 31° (1979) 0.07" NA
May 26 9.4° 20.6° 5° (1973) 32° (2005) 0.07" NA
May 27 9.4° 20.6° 4° (1966) 35° (2005) 0.07" NA
May 28 10° 20.6° 3° (1954) 38° (1983) 0.07" NA
May 29 10° 20.6° 5° (1978) 32° (1973) 0.07" NA
May 30 10° 20.6° 4° (1955) 33° (1986) 0.07" NA
May 31 10° 21.1° 4° (1966) 34° (2001) 0.07" NA
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