WEATHER IN Portland
Climate tables. Data for Portland.
Monthly temperature
| Month | Record low | Average low | Average | Average high | Record high |
| january | -18.9 (1950) | 2.3 | 5.5 | 8.6 | 18.9 (2005) |
| february | -19.4 (1950) | 2.7 | 6.7 | 10.8 | 21.7 (1988) |
| march | -7.2 (1989) | 4.3 | 9.1 | 13.8 | 26.7 (1947) |
| april | -1.7 (1955) | 6.5 | 11.6 | 16.7 | 32.2 (1998) |
| may | -1.7 (1954) | 9.7 | 15.2 | 20.7 | 37.8 (1983) |
| june | 3.9 (1966) | 12.3 | 17.9 | 23.5 | 38.9 (2006) |
| july | 6.1 (1955) | 14.7 | 21.2 | 27.7 | 41.7 (1942) |
| august | 6.7 (1980) | 14.9 | 21.4 | 27.9 | 41.7 (1981) |
| september | 1.1 (1965) | 12.3 | 18.6 | 24.8 | 40.6 (1988) |
| october | -3.3 (1971) | 8.2 | 13.1 | 18.0 | 33.3 (1987) |
| november | -10.6 (1955) | 4.8 | 8.4 | 11.9 | 22.8 (1975) |
| december | -14.4 (1964) | 2.3 | 5.3 | 8.3 | 18.3 (1993) |
| year | -19.4 (1950) | 7.6 | 12.4 | 17.3 | 41.7 (1942) |
Monthly precipitation
| Month | Average | Record low | Record high | Daily high |
| january | 128 | 2 (1985) | 348 (1883) | 63 (2009) |
| february | 94 | 4 (1920) | 339 (1881) | 55 (1996) |
| march | 101 | 16 (1885) | 324 (1873) | 42 (2014) |
| april | 73 | 14 (1956) | 319 (1952) | 32 (1988) |
| may | 64 | 3 (1992) | 168 (1879) | 37 (1968) |
| june | 41 | 0.8 (1951) | 137 (1888) | 43 (1958) |
| july | 13 | 0.0 (1883) | 68 (1983) | 27 (1995) |
| august | 14 | 0.0 (1885) | 115 (1968) | 37 (1977) |
| september | 39 | 0.0 (1873) | 140 (1927) | 57 (1969) |
| october | 87 | 0.0 (1895) | 295 (1882) | 62 (1994) |
| november | 138 | 9 (1936) | 401 (1875) | 68 (1996) |
| december | 147 | 22 (1876) | 512 (1882) | 55 (1942) |
| year | 915 | 571 (1985) | 1708 (1882) | 68 (1996) |
Number of days with solid, liquid, and mixed precipitation
| Type of precipitation | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Wind speed, m/s
| jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
The frequency of different wind directions, %
| direction | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Air humidity, %
| jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Snow cover
| Month | jul | aug | sep | oct | nov | dec | jan | feb | mar | apr | may | jun | Year |
| number of days | |||||||||||||
| height (sm) | |||||||||||||
| max height (sm) |
Cloudy, score
| month | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
| total | |||||||||||||
| low |
Number of clear, cloudy and cloudy days
| month | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
| Total cloud | |||||||||||||
| Low cloud | |||||||||||||
Number of days with different phenomena
| phenomenon | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
The frequency of different types of clouds, %
| type of clouds | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |